./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6f20249a191004f50add5285446ee5ffba043f1ff9b40e0e115c641082e595e2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:29:53,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:29:53,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:29:53,998 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:29:53,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:29:54,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:29:54,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:29:54,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:29:54,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:29:54,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:29:54,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:29:54,019 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:29:54,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:29:54,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:29:54,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:29:54,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:29:54,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:29:54,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:29:54,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:29:54,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:29:54,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:29:54,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:29:54,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:29:54,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:29:54,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:29:54,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:29:54,072 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:29:54,074 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:29:54,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:29:54,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:29:54,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:29:54,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:29:54,080 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:29:54,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:29:54,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:29:54,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:29:54,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:29:54,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:29:54,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:29:54,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:29:54,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:29:54,086 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:29:54,128 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:29:54,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:29:54,130 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:29:54,130 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:29:54,131 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:29:54,131 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:29:54,131 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:29:54,131 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:29:54,131 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:29:54,131 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:29:54,133 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:29:54,133 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:29:54,133 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:29:54,133 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:29:54,134 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:29:54,134 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:29:54,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:29:54,135 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:29:54,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:29:54,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:29:54,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:29:54,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:29:54,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:29:54,136 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:29:54,136 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:29:54,136 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:29:54,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:29:54,137 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:29:54,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:29:54,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:29:54,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:29:54,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:29:54,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:29:54,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:29:54,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:29:54,139 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:29:54,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:29:54,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:29:54,139 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:29:54,139 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:29:54,140 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_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f20249a191004f50add5285446ee5ffba043f1ff9b40e0e115c641082e595e2 [2021-11-19 13:29:54,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:29:54,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:29:54,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:29:54,437 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:29:54,438 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:29:54,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c [2021-11-19 13:29:54,515 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/data/c92592078/5b73506f02df4199842fb4bc60484ce6/FLAGdebf2db94 [2021-11-19 13:29:55,217 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:29:55,217 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c [2021-11-19 13:29:55,252 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/data/c92592078/5b73506f02df4199842fb4bc60484ce6/FLAGdebf2db94 [2021-11-19 13:29:55,396 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/data/c92592078/5b73506f02df4199842fb4bc60484ce6 [2021-11-19 13:29:55,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:29:55,400 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:29:55,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:29:55,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:29:55,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:29:55,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:29:55" (1/1) ... [2021-11-19 13:29:55,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72a55faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:29:55, skipping insertion in model container [2021-11-19 13:29:55,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:29:55" (1/1) ... [2021-11-19 13:29:55,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:29:55,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:29:55,815 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c[17414,17427] [2021-11-19 13:29:56,109 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:29:56,121 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 13:29:56,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@a4e2ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:29:56, skipping insertion in model container [2021-11-19 13:29:56,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:29:56,122 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:29:56,124 INFO L158 Benchmark]: Toolchain (without parser) took 723.48ms. Allocated memory is still 134.2MB. Free memory was 97.7MB in the beginning and 93.5MB in the end (delta: 4.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 13:29:56,125 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 94.4MB. Free memory is still 51.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:29:56,125 INFO L158 Benchmark]: CACSL2BoogieTranslator took 720.58ms. Allocated memory is still 134.2MB. Free memory was 97.7MB in the beginning and 93.5MB in the end (delta: 4.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 13:29:56,127 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 94.4MB. Free memory is still 51.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 720.58ms. Allocated memory is still 134.2MB. Free memory was 97.7MB in the beginning and 93.5MB in the end (delta: 4.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2603]: 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_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6f20249a191004f50add5285446ee5ffba043f1ff9b40e0e115c641082e595e2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:29:58,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:29:58,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:29:58,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:29:58,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:29:58,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:29:58,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:29:58,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:29:58,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:29:58,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:29:58,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:29:58,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:29:58,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:29:58,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:29:58,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:29:58,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:29:58,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:29:58,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:29:58,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:29:58,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:29:58,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:29:58,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:29:58,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:29:58,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:29:58,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:29:58,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:29:58,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:29:58,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:29:58,586 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:29:58,588 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:29:58,588 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:29:58,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:29:58,591 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:29:58,592 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:29:58,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:29:58,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:29:58,595 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:29:58,596 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:29:58,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:29:58,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:29:58,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:29:58,604 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:29:58,651 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:29:58,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:29:58,653 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:29:58,654 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:29:58,654 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:29:58,654 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:29:58,654 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:29:58,654 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:29:58,655 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:29:58,655 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:29:58,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:29:58,658 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:29:58,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:29:58,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:29:58,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:29:58,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:29:58,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:29:58,659 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:29:58,660 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:29:58,660 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:29:58,660 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:29:58,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:29:58,660 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:29:58,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:29:58,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:29:58,661 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:29:58,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:29:58,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:29:58,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:29:58,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:29:58,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:29:58,663 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:29:58,663 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:29:58,663 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:29:58,663 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:29:58,664 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:29:58,664 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_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f20249a191004f50add5285446ee5ffba043f1ff9b40e0e115c641082e595e2 [2021-11-19 13:29:59,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:29:59,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:29:59,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:29:59,091 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:29:59,091 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:29:59,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c [2021-11-19 13:29:59,159 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/data/a286f8cc2/8cab3a403f7a4a978ecb928ab0b25fad/FLAGe5467c2e6 [2021-11-19 13:29:59,763 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:29:59,764 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c [2021-11-19 13:29:59,799 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/data/a286f8cc2/8cab3a403f7a4a978ecb928ab0b25fad/FLAGe5467c2e6 [2021-11-19 13:30:00,001 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/data/a286f8cc2/8cab3a403f7a4a978ecb928ab0b25fad [2021-11-19 13:30:00,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:30:00,006 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:30:00,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:30:00,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:30:00,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:30:00,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:30:00" (1/1) ... [2021-11-19 13:30:00,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@604f0681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:00, skipping insertion in model container [2021-11-19 13:30:00,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:30:00" (1/1) ... [2021-11-19 13:30:00,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:30:00,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:30:00,479 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c[17414,17427] [2021-11-19 13:30:00,780 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:30:00,794 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:30:00,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:30:00,834 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c[17414,17427] [2021-11-19 13:30:00,920 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:30:00,925 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:30:00,950 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c[17414,17427] [2021-11-19 13:30:01,019 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:30:01,053 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:30:01,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:01 WrapperNode [2021-11-19 13:30:01,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:30:01,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:30:01,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:30:01,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:30:01,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:01" (1/1) ... [2021-11-19 13:30:01,099 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:01" (1/1) ... [2021-11-19 13:30:01,157 INFO L137 Inliner]: procedures = 101, calls = 352, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 879 [2021-11-19 13:30:01,158 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:30:01,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:30:01,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:30:01,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:30:01,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:01" (1/1) ... [2021-11-19 13:30:01,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:01" (1/1) ... [2021-11-19 13:30:01,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:01" (1/1) ... [2021-11-19 13:30:01,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:01" (1/1) ... [2021-11-19 13:30:01,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:01" (1/1) ... [2021-11-19 13:30:01,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:01" (1/1) ... [2021-11-19 13:30:01,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:01" (1/1) ... [2021-11-19 13:30:01,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:30:01,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:30:01,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:30:01,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:30:01,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:01" (1/1) ... [2021-11-19 13:30:01,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:30:01,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:30:01,320 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:30:01,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:30:01,377 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 13:30:01,378 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 13:30:01,378 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 13:30:01,378 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 13:30:01,378 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 13:30:01,378 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 13:30:01,378 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 13:30:01,378 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 13:30:01,378 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 13:30:01,379 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 13:30:01,379 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 13:30:01,379 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 13:30:01,380 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 13:30:01,380 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 13:30:01,380 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 13:30:01,380 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 13:30:01,380 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 13:30:01,380 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 13:30:01,380 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 13:30:01,380 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 13:30:01,381 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 13:30:01,381 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 13:30:01,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:30:01,381 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-19 13:30:01,381 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-19 13:30:01,381 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 13:30:01,381 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 13:30:01,381 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 13:30:01,382 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 13:30:01,382 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 13:30:01,382 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 13:30:01,382 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 13:30:01,382 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 13:30:01,382 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 13:30:01,382 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 13:30:01,383 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 13:30:01,383 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 13:30:01,383 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 13:30:01,383 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 13:30:01,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:30:01,383 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 13:30:01,383 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 13:30:01,383 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 13:30:01,384 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 13:30:01,384 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 13:30:01,384 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 13:30:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 13:30:01,385 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 13:30:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 13:30:01,385 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 13:30:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2021-11-19 13:30:01,385 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2021-11-19 13:30:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 13:30:01,385 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 13:30:01,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:30:01,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:30:01,386 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 13:30:01,386 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 13:30:01,386 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-19 13:30:01,386 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-19 13:30:01,536 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:30:01,538 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:30:02,988 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:30:03,014 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:30:03,015 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:30:03,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:30:03 BoogieIcfgContainer [2021-11-19 13:30:03,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:30:03,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:30:03,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:30:03,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:30:03,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:30:00" (1/3) ... [2021-11-19 13:30:03,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e6d25dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:30:03, skipping insertion in model container [2021-11-19 13:30:03,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:01" (2/3) ... [2021-11-19 13:30:03,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e6d25dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:30:03, skipping insertion in model container [2021-11-19 13:30:03,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:30:03" (3/3) ... [2021-11-19 13:30:03,030 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product32.cil.c [2021-11-19 13:30:03,036 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:30:03,036 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:30:03,092 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:30:03,098 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 13:30:03,098 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:30:03,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 600 states, 467 states have (on average 1.676659528907923) internal successors, (783), 490 states have internal predecessors, (783), 103 states have call successors, (103), 28 states have call predecessors, (103), 28 states have return successors, (103), 96 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 13:30:03,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 13:30:03,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:03,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:03,149 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:03,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:03,155 INFO L85 PathProgramCache]: Analyzing trace with hash -91382860, now seen corresponding path program 1 times [2021-11-19 13:30:03,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:03,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961621023] [2021-11-19 13:30:03,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:03,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:03,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:03,175 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:03,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:30:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:03,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 13:30:03,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:03,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:03,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:03,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961621023] [2021-11-19 13:30:03,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961621023] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:03,955 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:03,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 13:30:03,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387923095] [2021-11-19 13:30:03,958 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:03,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:30:03,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:04,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:30:04,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:30:04,037 INFO L87 Difference]: Start difference. First operand has 600 states, 467 states have (on average 1.676659528907923) internal successors, (783), 490 states have internal predecessors, (783), 103 states have call successors, (103), 28 states have call predecessors, (103), 28 states have return successors, (103), 96 states have call predecessors, (103), 103 states have call successors, (103) Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-19 13:30:04,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:04,162 INFO L93 Difference]: Finished difference Result 621 states and 1019 transitions. [2021-11-19 13:30:04,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:30:04,164 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 62 [2021-11-19 13:30:04,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:04,189 INFO L225 Difference]: With dead ends: 621 [2021-11-19 13:30:04,190 INFO L226 Difference]: Without dead ends: 592 [2021-11-19 13:30:04,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:30:04,197 INFO L933 BasicCegarLoop]: 980 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:04,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:30:04,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-19 13:30:04,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-19 13:30:04,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 461 states have (on average 1.6746203904555315) internal successors, (772), 482 states have internal predecessors, (772), 103 states have call successors, (103), 28 states have call predecessors, (103), 27 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-19 13:30:04,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 973 transitions. [2021-11-19 13:30:04,338 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 973 transitions. Word has length 62 [2021-11-19 13:30:04,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:04,340 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 973 transitions. [2021-11-19 13:30:04,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-19 13:30:04,341 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 973 transitions. [2021-11-19 13:30:04,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-19 13:30:04,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:04,347 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:04,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 13:30:04,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:04,564 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:04,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:04,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1386751384, now seen corresponding path program 1 times [2021-11-19 13:30:04,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:04,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818592160] [2021-11-19 13:30:04,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:04,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:04,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:04,567 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:04,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:30:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:04,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:30:04,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:05,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:05,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:05,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818592160] [2021-11-19 13:30:05,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818592160] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:05,365 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:05,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:30:05,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072380094] [2021-11-19 13:30:05,371 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:05,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:30:05,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:05,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:30:05,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:30:05,375 INFO L87 Difference]: Start difference. First operand 592 states and 973 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:30:05,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:05,558 INFO L93 Difference]: Finished difference Result 1168 states and 1924 transitions. [2021-11-19 13:30:05,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:30:05,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 64 [2021-11-19 13:30:05,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:05,570 INFO L225 Difference]: With dead ends: 1168 [2021-11-19 13:30:05,570 INFO L226 Difference]: Without dead ends: 592 [2021-11-19 13:30:05,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:30:05,581 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 15 mSDsluCounter, 2873 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3833 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:05,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 3833 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:30:05,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-19 13:30:05,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-19 13:30:05,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 461 states have (on average 1.6616052060737527) internal successors, (766), 482 states have internal predecessors, (766), 103 states have call successors, (103), 28 states have call predecessors, (103), 27 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-19 13:30:05,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 967 transitions. [2021-11-19 13:30:05,653 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 967 transitions. Word has length 64 [2021-11-19 13:30:05,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:05,654 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 967 transitions. [2021-11-19 13:30:05,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:30:05,655 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 967 transitions. [2021-11-19 13:30:05,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 13:30:05,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:05,667 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:05,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:05,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:05,889 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:05,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:05,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1396602603, now seen corresponding path program 1 times [2021-11-19 13:30:05,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:05,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053027797] [2021-11-19 13:30:05,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:05,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:05,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:05,892 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:05,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:30:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:06,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:30:06,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:06,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:06,741 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:06,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053027797] [2021-11-19 13:30:06,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053027797] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:06,741 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:06,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:30:06,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223749727] [2021-11-19 13:30:06,742 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:06,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:30:06,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:06,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:30:06,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:30:06,743 INFO L87 Difference]: Start difference. First operand 592 states and 967 transitions. Second operand has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 13:30:06,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:06,945 INFO L93 Difference]: Finished difference Result 1126 states and 1841 transitions. [2021-11-19 13:30:06,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:30:06,947 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 69 [2021-11-19 13:30:06,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:06,955 INFO L225 Difference]: With dead ends: 1126 [2021-11-19 13:30:06,955 INFO L226 Difference]: Without dead ends: 586 [2021-11-19 13:30:06,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:30:06,960 INFO L933 BasicCegarLoop]: 954 mSDtfsCounter, 214 mSDsluCounter, 5702 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 6656 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:06,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 6656 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:30:06,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-19 13:30:06,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-11-19 13:30:06,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 455 states have (on average 1.6549450549450548) internal successors, (753), 476 states have internal predecessors, (753), 103 states have call successors, (103), 28 states have call predecessors, (103), 27 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-19 13:30:06,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 954 transitions. [2021-11-19 13:30:06,999 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 954 transitions. Word has length 69 [2021-11-19 13:30:06,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:06,999 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 954 transitions. [2021-11-19 13:30:07,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 13:30:07,000 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 954 transitions. [2021-11-19 13:30:07,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 13:30:07,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:07,002 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:07,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-19 13:30:07,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:07,218 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:07,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:07,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1036648181, now seen corresponding path program 1 times [2021-11-19 13:30:07,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:07,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296842955] [2021-11-19 13:30:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:07,220 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:07,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:07,222 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:07,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:30:07,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:07,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:30:07,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:07,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:07,945 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:07,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296842955] [2021-11-19 13:30:07,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296842955] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:07,945 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:07,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:30:07,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129527424] [2021-11-19 13:30:07,946 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:07,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:30:07,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:07,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:30:07,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:30:07,948 INFO L87 Difference]: Start difference. First operand 586 states and 954 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:30:08,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:08,143 INFO L93 Difference]: Finished difference Result 1129 states and 1842 transitions. [2021-11-19 13:30:08,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:30:08,144 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 70 [2021-11-19 13:30:08,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:08,150 INFO L225 Difference]: With dead ends: 1129 [2021-11-19 13:30:08,150 INFO L226 Difference]: Without dead ends: 586 [2021-11-19 13:30:08,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:30:08,155 INFO L933 BasicCegarLoop]: 905 mSDtfsCounter, 121 mSDsluCounter, 2678 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 3583 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:08,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 3583 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:30:08,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-19 13:30:08,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-11-19 13:30:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 455 states have (on average 1.6021978021978023) internal successors, (729), 476 states have internal predecessors, (729), 103 states have call successors, (103), 28 states have call predecessors, (103), 27 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-19 13:30:08,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 930 transitions. [2021-11-19 13:30:08,187 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 930 transitions. Word has length 70 [2021-11-19 13:30:08,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:08,188 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 930 transitions. [2021-11-19 13:30:08,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:30:08,188 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 930 transitions. [2021-11-19 13:30:08,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-19 13:30:08,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:08,190 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:08,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-19 13:30:08,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:08,407 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:08,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:08,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1918577434, now seen corresponding path program 1 times [2021-11-19 13:30:08,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:08,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837455088] [2021-11-19 13:30:08,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:08,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:08,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:08,410 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:08,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:30:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:08,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:30:08,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:08,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:09,287 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:09,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837455088] [2021-11-19 13:30:09,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837455088] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:09,287 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:09,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 13:30:09,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360470656] [2021-11-19 13:30:09,288 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:09,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:30:09,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:09,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:30:09,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:30:09,290 INFO L87 Difference]: Start difference. First operand 586 states and 930 transitions. Second operand has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:30:09,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:09,429 INFO L93 Difference]: Finished difference Result 1120 states and 1804 transitions. [2021-11-19 13:30:09,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:30:09,430 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 72 [2021-11-19 13:30:09,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:09,437 INFO L225 Difference]: With dead ends: 1120 [2021-11-19 13:30:09,437 INFO L226 Difference]: Without dead ends: 565 [2021-11-19 13:30:09,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:30:09,441 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 117 mSDsluCounter, 4527 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 5445 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:09,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 5445 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:30:09,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-19 13:30:09,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-11-19 13:30:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 434 states have (on average 1.6221198156682028) internal successors, (704), 455 states have internal predecessors, (704), 103 states have call successors, (103), 28 states have call predecessors, (103), 27 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-19 13:30:09,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 905 transitions. [2021-11-19 13:30:09,471 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 905 transitions. Word has length 72 [2021-11-19 13:30:09,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:09,472 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 905 transitions. [2021-11-19 13:30:09,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:30:09,472 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 905 transitions. [2021-11-19 13:30:09,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 13:30:09,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:09,474 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:09,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:09,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:09,689 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:09,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:09,690 INFO L85 PathProgramCache]: Analyzing trace with hash 282402840, now seen corresponding path program 1 times [2021-11-19 13:30:09,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:09,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287338573] [2021-11-19 13:30:09,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:09,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:09,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:09,693 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:09,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:30:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:10,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:30:10,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:10,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:10,698 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:10,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287338573] [2021-11-19 13:30:10,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287338573] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:10,699 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:10,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:30:10,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189285467] [2021-11-19 13:30:10,699 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:10,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:30:10,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:10,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:30:10,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:30:10,701 INFO L87 Difference]: Start difference. First operand 565 states and 905 transitions. Second operand has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 13:30:10,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:10,891 INFO L93 Difference]: Finished difference Result 1093 states and 1768 transitions. [2021-11-19 13:30:10,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:30:10,893 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 75 [2021-11-19 13:30:10,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:10,899 INFO L225 Difference]: With dead ends: 1093 [2021-11-19 13:30:10,899 INFO L226 Difference]: Without dead ends: 565 [2021-11-19 13:30:10,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:30:10,904 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 45 mSDsluCounter, 7093 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 7983 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:10,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 7983 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:30:10,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-19 13:30:10,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-11-19 13:30:10,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 434 states have (on average 1.619815668202765) internal successors, (703), 455 states have internal predecessors, (703), 103 states have call successors, (103), 28 states have call predecessors, (103), 27 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-19 13:30:10,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 904 transitions. [2021-11-19 13:30:10,934 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 904 transitions. Word has length 75 [2021-11-19 13:30:10,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:10,934 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 904 transitions. [2021-11-19 13:30:10,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 13:30:10,935 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 904 transitions. [2021-11-19 13:30:10,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-19 13:30:10,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:10,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:10,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-19 13:30:11,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:11,153 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:11,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:11,153 INFO L85 PathProgramCache]: Analyzing trace with hash -22027596, now seen corresponding path program 1 times [2021-11-19 13:30:11,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:11,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881185879] [2021-11-19 13:30:11,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:11,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:11,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:11,156 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:11,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:30:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:11,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:30:11,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:12,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:12,506 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:12,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881185879] [2021-11-19 13:30:12,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881185879] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:12,506 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:12,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-19 13:30:12,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817668594] [2021-11-19 13:30:12,507 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:12,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:30:12,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:12,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:30:12,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:30:12,508 INFO L87 Difference]: Start difference. First operand 565 states and 904 transitions. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-19 13:30:22,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:22,076 INFO L93 Difference]: Finished difference Result 2837 states and 4677 transitions. [2021-11-19 13:30:22,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 13:30:22,077 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 76 [2021-11-19 13:30:22,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:22,101 INFO L225 Difference]: With dead ends: 2837 [2021-11-19 13:30:22,102 INFO L226 Difference]: Without dead ends: 2317 [2021-11-19 13:30:22,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:30:22,107 INFO L933 BasicCegarLoop]: 1619 mSDtfsCounter, 6049 mSDsluCounter, 2153 mSDsCounter, 0 mSdLazyCounter, 5932 mSolverCounterSat, 1693 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6237 SdHoareTripleChecker+Valid, 3772 SdHoareTripleChecker+Invalid, 7625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1693 IncrementalHoareTripleChecker+Valid, 5932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:22,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6237 Valid, 3772 Invalid, 7625 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1693 Valid, 5932 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2021-11-19 13:30:22,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-11-19 13:30:22,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2129. [2021-11-19 13:30:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 1632 states have (on average 1.6537990196078431) internal successors, (2699), 1697 states have internal predecessors, (2699), 403 states have call successors, (403), 90 states have call predecessors, (403), 93 states have return successors, (411), 368 states have call predecessors, (411), 398 states have call successors, (411) [2021-11-19 13:30:22,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 3513 transitions. [2021-11-19 13:30:22,251 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 3513 transitions. Word has length 76 [2021-11-19 13:30:22,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:22,252 INFO L470 AbstractCegarLoop]: Abstraction has 2129 states and 3513 transitions. [2021-11-19 13:30:22,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-19 13:30:22,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 3513 transitions. [2021-11-19 13:30:22,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 13:30:22,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:22,258 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:22,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:22,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:22,483 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:22,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:22,483 INFO L85 PathProgramCache]: Analyzing trace with hash 798323261, now seen corresponding path program 1 times [2021-11-19 13:30:22,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:22,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [616790605] [2021-11-19 13:30:22,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:22,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:22,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:22,494 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:22,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:30:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:22,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:30:22,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:30:23,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:30:23,875 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:23,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [616790605] [2021-11-19 13:30:23,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [616790605] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:23,876 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:23,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:30:23,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764838487] [2021-11-19 13:30:23,876 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:23,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:30:23,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:23,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:30:23,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:30:23,878 INFO L87 Difference]: Start difference. First operand 2129 states and 3513 transitions. Second operand has 13 states, 13 states have (on average 9.538461538461538) internal successors, (124), 11 states have internal predecessors, (124), 7 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-19 13:30:32,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:32,073 INFO L93 Difference]: Finished difference Result 5620 states and 9280 transitions. [2021-11-19 13:30:32,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 13:30:32,074 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 9.538461538461538) internal successors, (124), 11 states have internal predecessors, (124), 7 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 130 [2021-11-19 13:30:32,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:32,104 INFO L225 Difference]: With dead ends: 5620 [2021-11-19 13:30:32,104 INFO L226 Difference]: Without dead ends: 3536 [2021-11-19 13:30:32,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-19 13:30:32,125 INFO L933 BasicCegarLoop]: 1834 mSDtfsCounter, 3978 mSDsluCounter, 3099 mSDsCounter, 0 mSdLazyCounter, 7234 mSolverCounterSat, 1476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4068 SdHoareTripleChecker+Valid, 4933 SdHoareTripleChecker+Invalid, 8710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1476 IncrementalHoareTripleChecker+Valid, 7234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:32,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4068 Valid, 4933 Invalid, 8710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1476 Valid, 7234 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2021-11-19 13:30:32,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2021-11-19 13:30:32,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 3064. [2021-11-19 13:30:32,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3064 states, 2304 states have (on average 1.6189236111111112) internal successors, (3730), 2395 states have internal predecessors, (3730), 610 states have call successors, (610), 133 states have call predecessors, (610), 149 states have return successors, (646), 568 states have call predecessors, (646), 605 states have call successors, (646) [2021-11-19 13:30:32,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3064 states to 3064 states and 4986 transitions. [2021-11-19 13:30:32,367 INFO L78 Accepts]: Start accepts. Automaton has 3064 states and 4986 transitions. Word has length 130 [2021-11-19 13:30:32,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:32,368 INFO L470 AbstractCegarLoop]: Abstraction has 3064 states and 4986 transitions. [2021-11-19 13:30:32,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.538461538461538) internal successors, (124), 11 states have internal predecessors, (124), 7 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-19 13:30:32,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3064 states and 4986 transitions. [2021-11-19 13:30:32,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 13:30:32,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:32,376 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:32,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:32,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:32,596 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:32,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:32,597 INFO L85 PathProgramCache]: Analyzing trace with hash -766352287, now seen corresponding path program 1 times [2021-11-19 13:30:32,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:32,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714176904] [2021-11-19 13:30:32,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:32,598 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:32,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:32,599 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:32,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:30:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:32,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:30:32,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:33,267 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:30:33,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:30:33,836 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:33,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714176904] [2021-11-19 13:30:33,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714176904] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:30:33,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:30:33,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:30:33,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453301926] [2021-11-19 13:30:33,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:33,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:30:33,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:33,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:30:33,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:30:33,838 INFO L87 Difference]: Start difference. First operand 3064 states and 4986 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 13:30:34,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:34,865 INFO L93 Difference]: Finished difference Result 6123 states and 10170 transitions. [2021-11-19 13:30:34,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:30:34,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 131 [2021-11-19 13:30:34,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:34,889 INFO L225 Difference]: With dead ends: 6123 [2021-11-19 13:30:34,889 INFO L226 Difference]: Without dead ends: 3104 [2021-11-19 13:30:34,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:30:34,915 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 846 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:34,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 2249 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 13:30:34,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-11-19 13:30:35,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 3104. [2021-11-19 13:30:35,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 2334 states have (on average 1.610968294772922) internal successors, (3760), 2425 states have internal predecessors, (3760), 610 states have call successors, (610), 143 states have call predecessors, (610), 159 states have return successors, (652), 568 states have call predecessors, (652), 605 states have call successors, (652) [2021-11-19 13:30:35,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 5022 transitions. [2021-11-19 13:30:35,109 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 5022 transitions. Word has length 131 [2021-11-19 13:30:35,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:35,110 INFO L470 AbstractCegarLoop]: Abstraction has 3104 states and 5022 transitions. [2021-11-19 13:30:35,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 13:30:35,111 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 5022 transitions. [2021-11-19 13:30:35,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 13:30:35,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:35,118 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:35,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:35,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:35,331 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:35,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:35,331 INFO L85 PathProgramCache]: Analyzing trace with hash 2137448135, now seen corresponding path program 1 times [2021-11-19 13:30:35,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:35,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810951564] [2021-11-19 13:30:35,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:35,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:35,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:35,333 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:35,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:30:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:35,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:30:35,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:30:35,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:30:36,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:36,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810951564] [2021-11-19 13:30:36,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810951564] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:30:36,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:30:36,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:30:36,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061693806] [2021-11-19 13:30:36,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:36,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:30:36,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:36,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:30:36,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:30:36,484 INFO L87 Difference]: Start difference. First operand 3104 states and 5022 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 13:30:37,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:37,329 INFO L93 Difference]: Finished difference Result 6213 states and 10242 transitions. [2021-11-19 13:30:37,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:30:37,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 133 [2021-11-19 13:30:37,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:37,358 INFO L225 Difference]: With dead ends: 6213 [2021-11-19 13:30:37,359 INFO L226 Difference]: Without dead ends: 3154 [2021-11-19 13:30:37,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:30:37,385 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 831 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 2250 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:37,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 2250 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:30:37,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2021-11-19 13:30:37,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 3154. [2021-11-19 13:30:37,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3154 states, 2374 states have (on average 1.6006739679865207) internal successors, (3800), 2465 states have internal predecessors, (3800), 610 states have call successors, (610), 153 states have call predecessors, (610), 169 states have return successors, (658), 568 states have call predecessors, (658), 605 states have call successors, (658) [2021-11-19 13:30:37,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3154 states to 3154 states and 5068 transitions. [2021-11-19 13:30:37,631 INFO L78 Accepts]: Start accepts. Automaton has 3154 states and 5068 transitions. Word has length 133 [2021-11-19 13:30:37,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:37,632 INFO L470 AbstractCegarLoop]: Abstraction has 3154 states and 5068 transitions. [2021-11-19 13:30:37,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 13:30:37,632 INFO L276 IsEmpty]: Start isEmpty. Operand 3154 states and 5068 transitions. [2021-11-19 13:30:37,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-19 13:30:37,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:37,639 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:37,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:37,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:37,858 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:37,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:37,859 INFO L85 PathProgramCache]: Analyzing trace with hash -244087711, now seen corresponding path program 1 times [2021-11-19 13:30:37,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:37,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639263807] [2021-11-19 13:30:37,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:37,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:37,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:37,861 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:37,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:30:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:38,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:30:38,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:38,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:30:38,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:30:38,988 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:38,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639263807] [2021-11-19 13:30:38,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639263807] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:30:38,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:30:38,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:30:38,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581071843] [2021-11-19 13:30:38,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:38,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:30:38,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:38,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:30:38,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:30:38,991 INFO L87 Difference]: Start difference. First operand 3154 states and 5068 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 13:30:39,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:39,873 INFO L93 Difference]: Finished difference Result 6323 states and 10334 transitions. [2021-11-19 13:30:39,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:30:39,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 135 [2021-11-19 13:30:39,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:39,929 INFO L225 Difference]: With dead ends: 6323 [2021-11-19 13:30:39,930 INFO L226 Difference]: Without dead ends: 3214 [2021-11-19 13:30:39,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:30:39,954 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 832 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 2250 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:39,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 2250 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:30:39,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-11-19 13:30:40,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 3214. [2021-11-19 13:30:40,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3214 states, 2424 states have (on average 1.5882838283828382) internal successors, (3850), 2515 states have internal predecessors, (3850), 610 states have call successors, (610), 163 states have call predecessors, (610), 179 states have return successors, (664), 568 states have call predecessors, (664), 605 states have call successors, (664) [2021-11-19 13:30:40,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3214 states to 3214 states and 5124 transitions. [2021-11-19 13:30:40,156 INFO L78 Accepts]: Start accepts. Automaton has 3214 states and 5124 transitions. Word has length 135 [2021-11-19 13:30:40,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:40,156 INFO L470 AbstractCegarLoop]: Abstraction has 3214 states and 5124 transitions. [2021-11-19 13:30:40,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 13:30:40,157 INFO L276 IsEmpty]: Start isEmpty. Operand 3214 states and 5124 transitions. [2021-11-19 13:30:40,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 13:30:40,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:40,164 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:40,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:40,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:40,379 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:40,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:40,379 INFO L85 PathProgramCache]: Analyzing trace with hash 270880959, now seen corresponding path program 1 times [2021-11-19 13:30:40,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:40,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076804885] [2021-11-19 13:30:40,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:40,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:40,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:40,380 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:40,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:30:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:40,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:30:40,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:30:40,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:30:41,589 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:41,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076804885] [2021-11-19 13:30:41,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076804885] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:30:41,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:30:41,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:30:41,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436570959] [2021-11-19 13:30:41,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:41,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:30:41,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:41,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:30:41,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:30:41,593 INFO L87 Difference]: Start difference. First operand 3214 states and 5124 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 13:30:42,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:42,592 INFO L93 Difference]: Finished difference Result 6453 states and 10446 transitions. [2021-11-19 13:30:42,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:30:42,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 137 [2021-11-19 13:30:42,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:42,612 INFO L225 Difference]: With dead ends: 6453 [2021-11-19 13:30:42,612 INFO L226 Difference]: Without dead ends: 3284 [2021-11-19 13:30:42,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:30:42,626 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 841 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 2250 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:42,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 2250 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 13:30:42,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2021-11-19 13:30:42,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 3284. [2021-11-19 13:30:42,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3284 states, 2484 states have (on average 1.5740740740740742) internal successors, (3910), 2575 states have internal predecessors, (3910), 610 states have call successors, (610), 173 states have call predecessors, (610), 189 states have return successors, (670), 568 states have call predecessors, (670), 605 states have call successors, (670) [2021-11-19 13:30:42,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3284 states to 3284 states and 5190 transitions. [2021-11-19 13:30:42,817 INFO L78 Accepts]: Start accepts. Automaton has 3284 states and 5190 transitions. Word has length 137 [2021-11-19 13:30:42,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:42,818 INFO L470 AbstractCegarLoop]: Abstraction has 3284 states and 5190 transitions. [2021-11-19 13:30:42,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 13:30:42,818 INFO L276 IsEmpty]: Start isEmpty. Operand 3284 states and 5190 transitions. [2021-11-19 13:30:42,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 13:30:42,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:42,824 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:42,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:43,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:43,042 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:43,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:43,042 INFO L85 PathProgramCache]: Analyzing trace with hash -84626847, now seen corresponding path program 1 times [2021-11-19 13:30:43,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:43,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099746044] [2021-11-19 13:30:43,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:43,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:43,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:43,044 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:43,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:30:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:43,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:30:43,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:30:43,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:30:44,869 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:44,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099746044] [2021-11-19 13:30:44,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099746044] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:30:44,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [346646848] [2021-11-19 13:30:44,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:44,869 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:30:44,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:30:44,871 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:30:44,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 13:30:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:45,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:30:45,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 13:30:45,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:30:45,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [346646848] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:45,735 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:30:45,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-19 13:30:45,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626729135] [2021-11-19 13:30:45,736 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:45,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:30:45,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:45,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:30:45,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:30:45,737 INFO L87 Difference]: Start difference. First operand 3284 states and 5190 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 13:30:45,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:45,979 INFO L93 Difference]: Finished difference Result 9728 states and 15566 transitions. [2021-11-19 13:30:45,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:30:45,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 139 [2021-11-19 13:30:45,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:46,017 INFO L225 Difference]: With dead ends: 9728 [2021-11-19 13:30:46,018 INFO L226 Difference]: Without dead ends: 6491 [2021-11-19 13:30:46,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:30:46,032 INFO L933 BasicCegarLoop]: 1640 mSDtfsCounter, 850 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 2541 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:46,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [850 Valid, 2541 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:30:46,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6491 states. [2021-11-19 13:30:46,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6491 to 6446. [2021-11-19 13:30:46,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6446 states, 4885 states have (on average 1.5772773797338793) internal successors, (7705), 5058 states have internal predecessors, (7705), 1186 states have call successors, (1186), 335 states have call predecessors, (1186), 374 states have return successors, (1370), 1118 states have call predecessors, (1370), 1181 states have call successors, (1370) [2021-11-19 13:30:46,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6446 states to 6446 states and 10261 transitions. [2021-11-19 13:30:46,444 INFO L78 Accepts]: Start accepts. Automaton has 6446 states and 10261 transitions. Word has length 139 [2021-11-19 13:30:46,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:46,445 INFO L470 AbstractCegarLoop]: Abstraction has 6446 states and 10261 transitions. [2021-11-19 13:30:46,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 13:30:46,445 INFO L276 IsEmpty]: Start isEmpty. Operand 6446 states and 10261 transitions. [2021-11-19 13:30:46,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 13:30:46,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:46,452 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:46,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:46,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:46,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:30:46,868 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:46,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:46,869 INFO L85 PathProgramCache]: Analyzing trace with hash 616973027, now seen corresponding path program 1 times [2021-11-19 13:30:46,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:46,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762191589] [2021-11-19 13:30:46,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:46,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:46,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:46,870 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:46,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:30:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:47,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:30:47,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:30:47,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:30:48,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:48,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762191589] [2021-11-19 13:30:48,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762191589] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:30:48,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [278138855] [2021-11-19 13:30:48,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:48,713 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:30:48,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:30:48,714 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:30:48,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 13:30:49,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:49,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:30:49,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:30:49,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:30:49,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [278138855] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:49,526 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:30:49,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-19 13:30:49,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856567035] [2021-11-19 13:30:49,527 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:49,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:30:49,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:49,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:30:49,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:30:49,528 INFO L87 Difference]: Start difference. First operand 6446 states and 10261 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-19 13:30:49,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:49,884 INFO L93 Difference]: Finished difference Result 16704 states and 26842 transitions. [2021-11-19 13:30:49,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:30:49,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 139 [2021-11-19 13:30:49,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:49,981 INFO L225 Difference]: With dead ends: 16704 [2021-11-19 13:30:49,981 INFO L226 Difference]: Without dead ends: 10303 [2021-11-19 13:30:50,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:30:50,001 INFO L933 BasicCegarLoop]: 1089 mSDtfsCounter, 888 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1936 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:50,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 1936 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:30:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10303 states. [2021-11-19 13:30:50,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10303 to 10301. [2021-11-19 13:30:50,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10301 states, 7775 states have (on average 1.5741479099678457) internal successors, (12239), 8068 states have internal predecessors, (12239), 1932 states have call successors, (1932), 528 states have call predecessors, (1932), 593 states have return successors, (2333), 1836 states have call predecessors, (2333), 1927 states have call successors, (2333) [2021-11-19 13:30:50,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10301 states to 10301 states and 16504 transitions. [2021-11-19 13:30:50,614 INFO L78 Accepts]: Start accepts. Automaton has 10301 states and 16504 transitions. Word has length 139 [2021-11-19 13:30:50,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:50,615 INFO L470 AbstractCegarLoop]: Abstraction has 10301 states and 16504 transitions. [2021-11-19 13:30:50,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-19 13:30:50,615 INFO L276 IsEmpty]: Start isEmpty. Operand 10301 states and 16504 transitions. [2021-11-19 13:30:50,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-19 13:30:50,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:50,622 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:50,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:50,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-19 13:30:51,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:51,027 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:51,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:51,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1946006293, now seen corresponding path program 1 times [2021-11-19 13:30:51,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:51,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374971359] [2021-11-19 13:30:51,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:51,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:51,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:51,029 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:51,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:30:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:51,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:30:51,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:30:51,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:30:52,928 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:52,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374971359] [2021-11-19 13:30:52,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374971359] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:30:52,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [148803596] [2021-11-19 13:30:52,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:52,929 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:30:52,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:30:52,930 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:30:52,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 13:30:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:53,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:30:53,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:30:53,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:30:53,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [148803596] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:53,802 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:30:53,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-19 13:30:53,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653177367] [2021-11-19 13:30:53,803 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:53,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:30:53,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:53,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:30:53,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:30:53,804 INFO L87 Difference]: Start difference. First operand 10301 states and 16504 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-19 13:30:54,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:54,436 INFO L93 Difference]: Finished difference Result 28271 states and 45900 transitions. [2021-11-19 13:30:54,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:30:54,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 140 [2021-11-19 13:30:54,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:54,534 INFO L225 Difference]: With dead ends: 28271 [2021-11-19 13:30:54,534 INFO L226 Difference]: Without dead ends: 18015 [2021-11-19 13:30:54,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:30:54,564 INFO L933 BasicCegarLoop]: 1050 mSDtfsCounter, 887 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 1900 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:54,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 1900 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:30:54,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18015 states. [2021-11-19 13:30:55,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18015 to 18012. [2021-11-19 13:30:55,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18012 states, 13556 states have (on average 1.571333726763057) internal successors, (21301), 14089 states have internal predecessors, (21301), 3424 states have call successors, (3424), 914 states have call predecessors, (3424), 1031 states have return successors, (4451), 3272 states have call predecessors, (4451), 3419 states have call successors, (4451) [2021-11-19 13:30:55,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18012 states to 18012 states and 29176 transitions. [2021-11-19 13:30:55,895 INFO L78 Accepts]: Start accepts. Automaton has 18012 states and 29176 transitions. Word has length 140 [2021-11-19 13:30:55,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:55,896 INFO L470 AbstractCegarLoop]: Abstraction has 18012 states and 29176 transitions. [2021-11-19 13:30:55,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-19 13:30:55,896 INFO L276 IsEmpty]: Start isEmpty. Operand 18012 states and 29176 transitions. [2021-11-19 13:30:55,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-19 13:30:55,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:55,905 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:55,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:56,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:56,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:56,309 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:56,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:56,310 INFO L85 PathProgramCache]: Analyzing trace with hash 196368485, now seen corresponding path program 1 times [2021-11-19 13:30:56,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:56,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27349011] [2021-11-19 13:30:56,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:56,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:56,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:56,312 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:56,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 13:30:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:56,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:30:56,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:30:57,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:30:58,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:58,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27349011] [2021-11-19 13:30:58,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27349011] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:30:58,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1826722374] [2021-11-19 13:30:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:58,270 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:30:58,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:30:58,271 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:30:58,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 13:30:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:58,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:30:58,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:30:58,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:30:59,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1826722374] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:59,037 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:30:59,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-19 13:30:59,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649786909] [2021-11-19 13:30:59,037 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:59,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:30:59,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:59,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:30:59,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:30:59,039 INFO L87 Difference]: Start difference. First operand 18012 states and 29176 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-19 13:31:00,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:00,233 INFO L93 Difference]: Finished difference Result 51406 states and 84919 transitions. [2021-11-19 13:31:00,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:31:00,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 141 [2021-11-19 13:31:00,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:00,449 INFO L225 Difference]: With dead ends: 51406 [2021-11-19 13:31:00,450 INFO L226 Difference]: Without dead ends: 33439 [2021-11-19 13:31:00,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:31:00,523 INFO L933 BasicCegarLoop]: 1043 mSDtfsCounter, 886 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 1896 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:00,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 1896 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:31:00,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33439 states. [2021-11-19 13:31:02,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33439 to 33435. [2021-11-19 13:31:02,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33435 states, 25119 states have (on average 1.5684939687089454) internal successors, (39399), 26132 states have internal predecessors, (39399), 6408 states have call successors, (6408), 1686 states have call predecessors, (6408), 1907 states have return successors, (9287), 6144 states have call predecessors, (9287), 6403 states have call successors, (9287) [2021-11-19 13:31:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33435 states to 33435 states and 55094 transitions. [2021-11-19 13:31:02,802 INFO L78 Accepts]: Start accepts. Automaton has 33435 states and 55094 transitions. Word has length 141 [2021-11-19 13:31:02,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:02,803 INFO L470 AbstractCegarLoop]: Abstraction has 33435 states and 55094 transitions. [2021-11-19 13:31:02,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-19 13:31:02,804 INFO L276 IsEmpty]: Start isEmpty. Operand 33435 states and 55094 transitions. [2021-11-19 13:31:02,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 13:31:02,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:02,812 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:02,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:03,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:03,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:03,226 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:03,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:03,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1792175191, now seen corresponding path program 1 times [2021-11-19 13:31:03,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:03,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200333984] [2021-11-19 13:31:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:03,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:03,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:03,229 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:03,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 13:31:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:03,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:31:03,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:31:04,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:31:05,071 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:05,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200333984] [2021-11-19 13:31:05,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200333984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:31:05,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [439097314] [2021-11-19 13:31:05,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:05,072 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:31:05,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:31:05,074 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:31:05,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-19 13:31:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:05,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:31:05,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:31:05,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:31:05,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [439097314] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:31:05,933 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:31:05,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-19 13:31:05,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277516999] [2021-11-19 13:31:05,933 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:05,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:31:05,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:05,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:31:05,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:31:05,934 INFO L87 Difference]: Start difference. First operand 33435 states and 55094 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-19 13:31:08,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:08,834 INFO L93 Difference]: Finished difference Result 97677 states and 165924 transitions. [2021-11-19 13:31:08,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:31:08,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 142 [2021-11-19 13:31:08,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:09,250 INFO L225 Difference]: With dead ends: 97677 [2021-11-19 13:31:09,251 INFO L226 Difference]: Without dead ends: 64287 [2021-11-19 13:31:09,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 547 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:31:09,391 INFO L933 BasicCegarLoop]: 1037 mSDtfsCounter, 885 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 1893 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:09,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 1893 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:31:09,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64287 states. [2021-11-19 13:31:12,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64287 to 64282. [2021-11-19 13:31:12,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64282 states, 48246 states have (on average 1.565497657836919) internal successors, (75529), 50219 states have internal predecessors, (75529), 12376 states have call successors, (12376), 3230 states have call predecessors, (12376), 3659 states have return successors, (20927), 11888 states have call predecessors, (20927), 12371 states have call successors, (20927) [2021-11-19 13:31:13,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64282 states to 64282 states and 108832 transitions. [2021-11-19 13:31:13,635 INFO L78 Accepts]: Start accepts. Automaton has 64282 states and 108832 transitions. Word has length 142 [2021-11-19 13:31:13,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:13,636 INFO L470 AbstractCegarLoop]: Abstraction has 64282 states and 108832 transitions. [2021-11-19 13:31:13,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-19 13:31:13,637 INFO L276 IsEmpty]: Start isEmpty. Operand 64282 states and 108832 transitions. [2021-11-19 13:31:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-19 13:31:13,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:13,646 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:13,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:13,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:14,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:31:14,059 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:14,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:14,059 INFO L85 PathProgramCache]: Analyzing trace with hash -277420569, now seen corresponding path program 1 times [2021-11-19 13:31:14,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:14,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744172376] [2021-11-19 13:31:14,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:14,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:14,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:14,062 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:14,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 13:31:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:14,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:31:14,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:31:14,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:31:15,687 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:15,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744172376] [2021-11-19 13:31:15,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744172376] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:31:15,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1945526532] [2021-11-19 13:31:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:15,688 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:31:15,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:31:15,688 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:31:15,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-19 13:31:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:15,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:31:15,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:31:16,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:31:16,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1945526532] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:31:16,663 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:31:16,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-19 13:31:16,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897218026] [2021-11-19 13:31:16,663 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:16,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:31:16,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:16,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:31:16,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:31:16,665 INFO L87 Difference]: Start difference. First operand 64282 states and 108832 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-19 13:31:22,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:22,657 INFO L93 Difference]: Finished difference Result 190220 states and 338124 transitions. [2021-11-19 13:31:22,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:31:22,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 143 [2021-11-19 13:31:22,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:23,444 INFO L225 Difference]: With dead ends: 190220 [2021-11-19 13:31:23,444 INFO L226 Difference]: Without dead ends: 125751 [2021-11-19 13:31:23,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 551 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:31:23,934 INFO L933 BasicCegarLoop]: 1033 mSDtfsCounter, 884 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1892 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:23,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 1892 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:31:24,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125751 states. [2021-11-19 13:31:30,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125751 to 125739. [2021-11-19 13:31:30,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125739 states, 94306 states have (on average 1.5614701079464721) internal successors, (147256), 98201 states have internal predecessors, (147256), 24290 states have call successors, (24290), 6298 states have call predecessors, (24290), 7142 states have return successors, (50778), 23351 states have call predecessors, (50778), 24285 states have call successors, (50778) [2021-11-19 13:31:32,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125739 states to 125739 states and 222324 transitions. [2021-11-19 13:31:32,160 INFO L78 Accepts]: Start accepts. Automaton has 125739 states and 222324 transitions. Word has length 143 [2021-11-19 13:31:32,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:32,161 INFO L470 AbstractCegarLoop]: Abstraction has 125739 states and 222324 transitions. [2021-11-19 13:31:32,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-19 13:31:32,162 INFO L276 IsEmpty]: Start isEmpty. Operand 125739 states and 222324 transitions. [2021-11-19 13:31:32,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-19 13:31:32,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:32,207 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:32,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:32,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:32,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:31:32,623 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:32,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:32,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1228374368, now seen corresponding path program 1 times [2021-11-19 13:31:32,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:32,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732305641] [2021-11-19 13:31:32,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:32,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:32,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:32,625 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:32,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06012276-3e67-4c06-bdf4-df4dc9566ce4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 13:31:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:33,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:31:33,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-19 13:31:33,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:34,777 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-19 13:31:34,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:34,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732305641] [2021-11-19 13:31:34,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732305641] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:31:34,777 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:31:34,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2021-11-19 13:31:34,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838296781] [2021-11-19 13:31:34,778 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:34,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 13:31:34,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:34,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 13:31:34,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:31:34,780 INFO L87 Difference]: Start difference. First operand 125739 states and 222324 transitions. Second operand has 16 states, 16 states have (on average 9.875) internal successors, (158), 12 states have internal predecessors, (158), 6 states have call successors, (35), 4 states have call predecessors, (35), 8 states have return successors, (34), 10 states have call predecessors, (34), 5 states have call successors, (34)