./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product22.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_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/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_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/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_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/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 10f09c8c5639b403d441157c6cb90f176690981c36f4af5417d0103735cbe364 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:39:47,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:39:47,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:39:47,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:39:47,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:39:47,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:39:47,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:39:47,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:39:47,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:39:47,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:39:47,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:39:47,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:39:47,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:39:47,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:39:47,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:39:47,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:39:47,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:39:47,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:39:47,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:39:47,310 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:39:47,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:39:47,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:39:47,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:39:47,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:39:47,332 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:39:47,338 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:39:47,338 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:39:47,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:39:47,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:39:47,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:39:47,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:39:47,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:39:47,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:39:47,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:39:47,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:39:47,354 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:39:47,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:39:47,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:39:47,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:39:47,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:39:47,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:39:47,359 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:39:47,408 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:39:47,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:39:47,409 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:39:47,410 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:39:47,410 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:39:47,410 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:39:47,411 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:39:47,411 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:39:47,411 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:39:47,411 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:39:47,412 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:39:47,412 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:39:47,412 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:39:47,413 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:39:47,413 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:39:47,413 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:39:47,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:39:47,415 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:39:47,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:39:47,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:39:47,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:39:47,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:39:47,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:39:47,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:39:47,417 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:39:47,417 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:39:47,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:39:47,418 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:39:47,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:39:47,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:39:47,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:39:47,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:39:47,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:39:47,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:39:47,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:39:47,421 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:39:47,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:39:47,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:39:47,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:39:47,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:39:47,422 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_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f09c8c5639b403d441157c6cb90f176690981c36f4af5417d0103735cbe364 [2021-11-19 14:39:47,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:39:47,789 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:39:47,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:39:47,794 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:39:47,795 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:39:47,797 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c [2021-11-19 14:39:47,905 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/data/cde99c196/a82900b4b17a42509cbd407684c78496/FLAGbf3115151 [2021-11-19 14:39:48,724 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:39:48,725 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c [2021-11-19 14:39:48,750 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/data/cde99c196/a82900b4b17a42509cbd407684c78496/FLAGbf3115151 [2021-11-19 14:39:48,830 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/data/cde99c196/a82900b4b17a42509cbd407684c78496 [2021-11-19 14:39:48,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:39:48,836 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:39:48,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:39:48,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:39:48,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:39:48,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:39:48" (1/1) ... [2021-11-19 14:39:48,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b821dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:48, skipping insertion in model container [2021-11-19 14:39:48,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:39:48" (1/1) ... [2021-11-19 14:39:48,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:39:48,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:39:49,227 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_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c[3205,3218] [2021-11-19 14:39:49,713 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:39:49,727 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:39:49,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@792a2c1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:49, skipping insertion in model container [2021-11-19 14:39:49,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:39:49,728 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:39:49,731 INFO L158 Benchmark]: Toolchain (without parser) took 893.05ms. Allocated memory is still 117.4MB. Free memory was 79.2MB in the beginning and 78.5MB in the end (delta: 698.6kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:39:49,732 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 83.9MB. Free memory was 62.9MB in the beginning and 62.8MB in the end (delta: 30.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:39:49,733 INFO L158 Benchmark]: CACSL2BoogieTranslator took 889.42ms. Allocated memory is still 117.4MB. Free memory was 79.2MB in the beginning and 78.5MB in the end (delta: 698.6kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:39:49,735 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 83.9MB. Free memory was 62.9MB in the beginning and 62.8MB in the end (delta: 30.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 889.42ms. Allocated memory is still 117.4MB. Free memory was 79.2MB in the beginning and 78.5MB in the end (delta: 698.6kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 188]: 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_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/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_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/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_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/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 10f09c8c5639b403d441157c6cb90f176690981c36f4af5417d0103735cbe364 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:39:52,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:39:52,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:39:52,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:39:52,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:39:52,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:39:52,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:39:52,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:39:52,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:39:52,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:39:52,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:39:52,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:39:52,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:39:52,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:39:52,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:39:52,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:39:52,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:39:52,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:39:52,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:39:52,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:39:52,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:39:52,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:39:52,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:39:52,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:39:52,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:39:52,653 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:39:52,653 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:39:52,655 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:39:52,655 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:39:52,657 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:39:52,658 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:39:52,659 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:39:52,660 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:39:52,662 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:39:52,664 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:39:52,664 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:39:52,665 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:39:52,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:39:52,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:39:52,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:39:52,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:39:52,679 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:39:52,742 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:39:52,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:39:52,745 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:39:52,745 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:39:52,745 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:39:52,745 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:39:52,746 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:39:52,746 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:39:52,747 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:39:52,747 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:39:52,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:39:52,750 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:39:52,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:39:52,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:39:52,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:39:52,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:39:52,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:39:52,752 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:39:52,752 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:39:52,753 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:39:52,753 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:39:52,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:39:52,754 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:39:52,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:39:52,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:39:52,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:39:52,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:39:52,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:39:52,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:39:52,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:39:52,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:39:52,757 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:39:52,757 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:39:52,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:39:52,758 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:39:52,758 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:39:52,758 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_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f09c8c5639b403d441157c6cb90f176690981c36f4af5417d0103735cbe364 [2021-11-19 14:39:53,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:39:53,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:39:53,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:39:53,270 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:39:53,271 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:39:53,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c [2021-11-19 14:39:53,354 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/data/8d4d5613a/e19da1cb49424032885cc60cfcbd099d/FLAG7169d76ea [2021-11-19 14:39:54,316 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:39:54,317 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c [2021-11-19 14:39:54,358 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/data/8d4d5613a/e19da1cb49424032885cc60cfcbd099d/FLAG7169d76ea [2021-11-19 14:39:54,377 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/data/8d4d5613a/e19da1cb49424032885cc60cfcbd099d [2021-11-19 14:39:54,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:39:54,383 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:39:54,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:39:54,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:39:54,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:39:54,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:39:54" (1/1) ... [2021-11-19 14:39:54,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a7b58f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:54, skipping insertion in model container [2021-11-19 14:39:54,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:39:54" (1/1) ... [2021-11-19 14:39:54,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:39:54,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:39:54,728 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_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c[3205,3218] [2021-11-19 14:39:55,185 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:39:55,203 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:39:55,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:39:55,258 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_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c[3205,3218] [2021-11-19 14:39:55,463 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:39:55,476 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:39:55,494 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_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c[3205,3218] [2021-11-19 14:39:55,668 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:39:55,707 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:39:55,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:55 WrapperNode [2021-11-19 14:39:55,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:39:55,709 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:39:55,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:39:55,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:39:55,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:55" (1/1) ... [2021-11-19 14:39:55,761 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:55" (1/1) ... [2021-11-19 14:39:55,876 INFO L137 Inliner]: procedures = 94, calls = 351, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 847 [2021-11-19 14:39:55,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:39:55,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:39:55,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:39:55,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:39:55,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:55" (1/1) ... [2021-11-19 14:39:55,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:55" (1/1) ... [2021-11-19 14:39:55,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:55" (1/1) ... [2021-11-19 14:39:55,936 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:55" (1/1) ... [2021-11-19 14:39:55,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:55" (1/1) ... [2021-11-19 14:39:56,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:55" (1/1) ... [2021-11-19 14:39:56,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:55" (1/1) ... [2021-11-19 14:39:56,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:39:56,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:39:56,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:39:56,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:39:56,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:55" (1/1) ... [2021-11-19 14:39:56,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:39:56,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:39:56,139 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:39:56,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:39:56,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:39:56,197 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-19 14:39:56,197 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-19 14:39:56,198 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 14:39:56,198 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 14:39:56,198 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:39:56,198 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:39:56,199 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:39:56,199 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:39:56,199 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 14:39:56,199 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 14:39:56,199 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:39:56,200 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:39:56,200 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:39:56,200 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:39:56,200 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:39:56,200 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:39:56,201 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 14:39:56,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 14:39:56,201 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:39:56,203 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:39:56,203 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:39:56,203 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:39:56,203 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:39:56,203 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:39:56,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:39:56,204 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 14:39:56,204 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 14:39:56,204 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-19 14:39:56,205 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-19 14:39:56,205 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:39:56,205 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:39:56,206 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-19 14:39:56,207 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-19 14:39:56,207 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:39:56,208 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:39:56,208 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:39:56,208 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:39:56,208 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:39:56,208 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:39:56,209 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:39:56,209 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:39:56,209 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 14:39:56,209 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 14:39:56,210 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:39:56,210 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:39:56,210 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:39:56,211 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:39:56,212 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:39:56,213 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:39:56,213 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-11-19 14:39:56,215 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-11-19 14:39:56,215 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-19 14:39:56,215 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-19 14:39:56,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:39:56,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:39:56,216 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:39:56,216 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:39:56,465 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:39:56,468 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:39:58,029 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:39:58,050 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:39:58,051 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:39:58,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:39:58 BoogieIcfgContainer [2021-11-19 14:39:58,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:39:58,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:39:58,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:39:58,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:39:58,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:39:54" (1/3) ... [2021-11-19 14:39:58,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c781a59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:39:58, skipping insertion in model container [2021-11-19 14:39:58,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:55" (2/3) ... [2021-11-19 14:39:58,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c781a59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:39:58, skipping insertion in model container [2021-11-19 14:39:58,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:39:58" (3/3) ... [2021-11-19 14:39:58,066 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product22.cil.c [2021-11-19 14:39:58,072 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:39:58,073 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:39:58,162 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:39:58,179 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:39:58,184 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:39:58,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 596 states, 459 states have (on average 1.673202614379085) internal successors, (768), 479 states have internal predecessors, (768), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-19 14:39:58,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-19 14:39:58,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:58,258 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:39:58,258 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:58,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:58,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1321862527, now seen corresponding path program 1 times [2021-11-19 14:39:58,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:58,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [798145715] [2021-11-19 14:39:58,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:58,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:58,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:58,295 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:58,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:39:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:58,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:39:58,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:39:59,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:39:59,854 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:59,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [798145715] [2021-11-19 14:39:59,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [798145715] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:39:59,856 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:39:59,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:39:59,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786018391] [2021-11-19 14:39:59,859 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:59,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:39:59,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:59,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:39:59,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:39:59,908 INFO L87 Difference]: Start difference. First operand has 596 states, 459 states have (on average 1.673202614379085) internal successors, (768), 479 states have internal predecessors, (768), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 11 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:40:00,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:00,365 INFO L93 Difference]: Finished difference Result 1195 states and 1989 transitions. [2021-11-19 14:40:00,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:40:00,369 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 67 [2021-11-19 14:40:00,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:00,398 INFO L225 Difference]: With dead ends: 1195 [2021-11-19 14:40:00,398 INFO L226 Difference]: Without dead ends: 607 [2021-11-19 14:40:00,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:40:00,432 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 119 mSDsluCounter, 6593 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 7559 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:00,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 7559 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:40:00,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-19 14:40:00,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 599. [2021-11-19 14:40:00,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 462 states have (on average 1.6645021645021645) internal successors, (769), 482 states have internal predecessors, (769), 109 states have call successors, (109), 27 states have call predecessors, (109), 27 states have return successors, (108), 103 states have call predecessors, (108), 106 states have call successors, (108) [2021-11-19 14:40:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 986 transitions. [2021-11-19 14:40:00,629 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 986 transitions. Word has length 67 [2021-11-19 14:40:00,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:00,631 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 986 transitions. [2021-11-19 14:40:00,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:40:00,632 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 986 transitions. [2021-11-19 14:40:00,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 14:40:00,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:00,652 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:00,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:00,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:00,877 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:00,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:00,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1068252313, now seen corresponding path program 1 times [2021-11-19 14:40:00,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:00,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776541146] [2021-11-19 14:40:00,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:00,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:00,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:00,882 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:00,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:40:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:01,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:40:01,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:40:01,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:40:01,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:01,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776541146] [2021-11-19 14:40:01,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776541146] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:01,995 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:01,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:40:01,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988621232] [2021-11-19 14:40:01,996 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:01,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:40:01,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:01,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:40:01,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:40:01,999 INFO L87 Difference]: Start difference. First operand 599 states and 986 transitions. Second operand has 11 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:40:02,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:02,415 INFO L93 Difference]: Finished difference Result 1203 states and 1990 transitions. [2021-11-19 14:40:02,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:40:02,417 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 68 [2021-11-19 14:40:02,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:02,428 INFO L225 Difference]: With dead ends: 1203 [2021-11-19 14:40:02,428 INFO L226 Difference]: Without dead ends: 620 [2021-11-19 14:40:02,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:40:02,435 INFO L933 BasicCegarLoop]: 967 mSDtfsCounter, 105 mSDsluCounter, 7523 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 8490 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:02,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 8490 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:40:02,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-11-19 14:40:02,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 612. [2021-11-19 14:40:02,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 472 states have (on average 1.6610169491525424) internal successors, (784), 494 states have internal predecessors, (784), 110 states have call successors, (110), 27 states have call predecessors, (110), 29 states have return successors, (111), 104 states have call predecessors, (111), 107 states have call successors, (111) [2021-11-19 14:40:02,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1005 transitions. [2021-11-19 14:40:02,531 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1005 transitions. Word has length 68 [2021-11-19 14:40:02,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:02,533 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 1005 transitions. [2021-11-19 14:40:02,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:40:02,534 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1005 transitions. [2021-11-19 14:40:02,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 14:40:02,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:02,541 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:02,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:02,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:02,756 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:02,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:02,757 INFO L85 PathProgramCache]: Analyzing trace with hash 831976675, now seen corresponding path program 1 times [2021-11-19 14:40:02,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:02,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688221774] [2021-11-19 14:40:02,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:02,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:02,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:02,775 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:02,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:40:03,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:03,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:40:03,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:40:03,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:40:03,858 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:03,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688221774] [2021-11-19 14:40:03,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688221774] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:03,863 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:03,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:40:03,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126577109] [2021-11-19 14:40:03,864 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:03,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:40:03,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:03,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:40:03,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:40:03,869 INFO L87 Difference]: Start difference. First operand 612 states and 1005 transitions. Second operand has 11 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:40:04,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:04,244 INFO L93 Difference]: Finished difference Result 1229 states and 2029 transitions. [2021-11-19 14:40:04,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:40:04,246 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 69 [2021-11-19 14:40:04,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:04,254 INFO L225 Difference]: With dead ends: 1229 [2021-11-19 14:40:04,254 INFO L226 Difference]: Without dead ends: 633 [2021-11-19 14:40:04,259 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 14:40:04,261 INFO L933 BasicCegarLoop]: 968 mSDtfsCounter, 173 mSDsluCounter, 6655 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 7623 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:04,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 7623 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:40:04,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-11-19 14:40:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 625. [2021-11-19 14:40:04,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 482 states have (on average 1.657676348547718) internal successors, (799), 506 states have internal predecessors, (799), 111 states have call successors, (111), 27 states have call predecessors, (111), 31 states have return successors, (114), 105 states have call predecessors, (114), 108 states have call successors, (114) [2021-11-19 14:40:04,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1024 transitions. [2021-11-19 14:40:04,308 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1024 transitions. Word has length 69 [2021-11-19 14:40:04,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:04,310 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1024 transitions. [2021-11-19 14:40:04,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:40:04,311 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1024 transitions. [2021-11-19 14:40:04,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 14:40:04,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:04,316 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:04,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:04,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:04,538 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:04,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:04,539 INFO L85 PathProgramCache]: Analyzing trace with hash 2027962686, now seen corresponding path program 1 times [2021-11-19 14:40:04,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:04,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187757002] [2021-11-19 14:40:04,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:04,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:04,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:04,542 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:04,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:40:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:04,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:40:04,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:05,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:40:05,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:40:05,535 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:05,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187757002] [2021-11-19 14:40:05,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187757002] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:05,536 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:05,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:40:05,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636105792] [2021-11-19 14:40:05,537 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:05,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:40:05,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:05,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:40:05,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:40:05,539 INFO L87 Difference]: Start difference. First operand 625 states and 1024 transitions. Second operand has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:40:05,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:05,784 INFO L93 Difference]: Finished difference Result 1249 states and 2059 transitions. [2021-11-19 14:40:05,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:40:05,786 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2021-11-19 14:40:05,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:05,794 INFO L225 Difference]: With dead ends: 1249 [2021-11-19 14:40:05,794 INFO L226 Difference]: Without dead ends: 640 [2021-11-19 14:40:05,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:40:05,800 INFO L933 BasicCegarLoop]: 954 mSDtfsCounter, 150 mSDsluCounter, 5518 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 6472 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:05,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 6472 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:40:05,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-11-19 14:40:05,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 638. [2021-11-19 14:40:05,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 492 states have (on average 1.6544715447154472) internal successors, (814), 518 states have internal predecessors, (814), 112 states have call successors, (112), 27 states have call predecessors, (112), 33 states have return successors, (120), 106 states have call predecessors, (120), 109 states have call successors, (120) [2021-11-19 14:40:05,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1046 transitions. [2021-11-19 14:40:05,845 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1046 transitions. Word has length 70 [2021-11-19 14:40:05,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:05,846 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1046 transitions. [2021-11-19 14:40:05,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:40:05,846 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1046 transitions. [2021-11-19 14:40:05,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-19 14:40:05,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:05,850 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:05,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:06,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:06,072 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:06,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:06,073 INFO L85 PathProgramCache]: Analyzing trace with hash 912827463, now seen corresponding path program 1 times [2021-11-19 14:40:06,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:06,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686990759] [2021-11-19 14:40:06,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:06,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:06,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:06,076 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:06,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:40:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:06,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:40:06,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:40:06,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:40:07,229 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:07,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686990759] [2021-11-19 14:40:07,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686990759] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:07,229 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:07,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:40:07,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527943938] [2021-11-19 14:40:07,230 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:07,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:40:07,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:07,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:40:07,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:40:07,234 INFO L87 Difference]: Start difference. First operand 638 states and 1046 transitions. Second operand has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:40:07,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:07,640 INFO L93 Difference]: Finished difference Result 1272 states and 2095 transitions. [2021-11-19 14:40:07,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:40:07,642 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 71 [2021-11-19 14:40:07,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:07,650 INFO L225 Difference]: With dead ends: 1272 [2021-11-19 14:40:07,650 INFO L226 Difference]: Without dead ends: 644 [2021-11-19 14:40:07,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:40:07,658 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 205 mSDsluCounter, 6548 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 7494 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:07,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 7494 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:40:07,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-11-19 14:40:07,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 634. [2021-11-19 14:40:07,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 488 states have (on average 1.6454918032786885) internal successors, (803), 514 states have internal predecessors, (803), 112 states have call successors, (112), 27 states have call predecessors, (112), 33 states have return successors, (120), 106 states have call predecessors, (120), 109 states have call successors, (120) [2021-11-19 14:40:07,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1035 transitions. [2021-11-19 14:40:07,712 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1035 transitions. Word has length 71 [2021-11-19 14:40:07,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:07,713 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 1035 transitions. [2021-11-19 14:40:07,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:40:07,713 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1035 transitions. [2021-11-19 14:40:07,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-19 14:40:07,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:07,717 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:07,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:07,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:07,932 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:07,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:07,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1427527049, now seen corresponding path program 1 times [2021-11-19 14:40:07,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:07,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631235937] [2021-11-19 14:40:07,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:07,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:07,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:07,937 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:07,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:40:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:08,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:40:08,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:40:08,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:40:08,820 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:08,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631235937] [2021-11-19 14:40:08,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631235937] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:08,821 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:08,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:40:08,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33082718] [2021-11-19 14:40:08,822 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:08,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:40:08,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:08,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:40:08,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:40:08,823 INFO L87 Difference]: Start difference. First operand 634 states and 1035 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 14:40:08,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:08,900 INFO L93 Difference]: Finished difference Result 1244 states and 2036 transitions. [2021-11-19 14:40:08,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:40:08,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 71 [2021-11-19 14:40:08,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:08,908 INFO L225 Difference]: With dead ends: 1244 [2021-11-19 14:40:08,908 INFO L226 Difference]: Without dead ends: 557 [2021-11-19 14:40:08,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:40:08,915 INFO L933 BasicCegarLoop]: 955 mSDtfsCounter, 32 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1907 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:08,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1907 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:40:08,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-19 14:40:08,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2021-11-19 14:40:08,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 423 states have (on average 1.6288416075650118) internal successors, (689), 441 states have internal predecessors, (689), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-19 14:40:08,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 902 transitions. [2021-11-19 14:40:08,947 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 902 transitions. Word has length 71 [2021-11-19 14:40:08,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:08,948 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 902 transitions. [2021-11-19 14:40:08,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 14:40:08,948 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 902 transitions. [2021-11-19 14:40:08,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-19 14:40:08,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:08,950 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:08,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:09,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:09,172 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:09,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:09,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1385718813, now seen corresponding path program 1 times [2021-11-19 14:40:09,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:09,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787633651] [2021-11-19 14:40:09,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:09,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:09,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:09,174 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:09,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:40:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:09,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:40:09,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:40:09,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:40:10,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:10,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787633651] [2021-11-19 14:40:10,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787633651] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:10,307 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:10,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:40:10,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077893806] [2021-11-19 14:40:10,307 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:10,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:40:10,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:10,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:40:10,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:40:10,309 INFO L87 Difference]: Start difference. First operand 557 states and 902 transitions. Second operand has 13 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:40:10,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:10,554 INFO L93 Difference]: Finished difference Result 1101 states and 1792 transitions. [2021-11-19 14:40:10,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:40:10,555 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2021-11-19 14:40:10,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:10,562 INFO L225 Difference]: With dead ends: 1101 [2021-11-19 14:40:10,562 INFO L226 Difference]: Without dead ends: 557 [2021-11-19 14:40:10,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:40:10,568 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 38 mSDsluCounter, 7916 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 8801 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:10,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 8801 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:40:10,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-19 14:40:10,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2021-11-19 14:40:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 423 states have (on average 1.6264775413711583) internal successors, (688), 441 states have internal predecessors, (688), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-19 14:40:10,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 901 transitions. [2021-11-19 14:40:10,598 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 901 transitions. Word has length 72 [2021-11-19 14:40:10,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:10,599 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 901 transitions. [2021-11-19 14:40:10,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:40:10,600 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 901 transitions. [2021-11-19 14:40:10,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 14:40:10,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:10,602 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:10,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:10,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:10,823 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:10,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:10,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1452969140, now seen corresponding path program 1 times [2021-11-19 14:40:10,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:10,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58671824] [2021-11-19 14:40:10,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:10,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:10,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:10,826 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:10,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:40:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:11,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:40:11,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:40:11,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:40:11,917 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:11,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58671824] [2021-11-19 14:40:11,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58671824] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:11,918 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:11,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:40:11,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379237533] [2021-11-19 14:40:11,919 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:11,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:40:11,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:11,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:40:11,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:40:11,921 INFO L87 Difference]: Start difference. First operand 557 states and 901 transitions. Second operand has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:40:12,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:12,194 INFO L93 Difference]: Finished difference Result 1101 states and 1790 transitions. [2021-11-19 14:40:12,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:40:12,196 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 73 [2021-11-19 14:40:12,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:12,202 INFO L225 Difference]: With dead ends: 1101 [2021-11-19 14:40:12,202 INFO L226 Difference]: Without dead ends: 557 [2021-11-19 14:40:12,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:40:12,208 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 36 mSDsluCounter, 7916 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 8801 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:12,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 8801 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:40:12,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-19 14:40:12,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2021-11-19 14:40:12,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 423 states have (on average 1.624113475177305) internal successors, (687), 441 states have internal predecessors, (687), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-19 14:40:12,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 900 transitions. [2021-11-19 14:40:12,239 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 900 transitions. Word has length 73 [2021-11-19 14:40:12,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:12,240 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 900 transitions. [2021-11-19 14:40:12,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:40:12,240 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 900 transitions. [2021-11-19 14:40:12,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 14:40:12,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:12,243 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:12,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:12,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:12,463 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:12,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:12,464 INFO L85 PathProgramCache]: Analyzing trace with hash 423566914, now seen corresponding path program 1 times [2021-11-19 14:40:12,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:12,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826871726] [2021-11-19 14:40:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:12,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:12,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:12,467 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:12,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:40:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:12,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:40:12,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:40:13,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:40:13,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:13,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826871726] [2021-11-19 14:40:13,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826871726] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:13,670 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:13,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:40:13,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824994090] [2021-11-19 14:40:13,671 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:13,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:40:13,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:13,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:40:13,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:40:13,672 INFO L87 Difference]: Start difference. First operand 557 states and 900 transitions. Second operand has 13 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:40:13,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:13,892 INFO L93 Difference]: Finished difference Result 1101 states and 1788 transitions. [2021-11-19 14:40:13,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:40:13,894 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 74 [2021-11-19 14:40:13,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:13,901 INFO L225 Difference]: With dead ends: 1101 [2021-11-19 14:40:13,901 INFO L226 Difference]: Without dead ends: 557 [2021-11-19 14:40:13,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:40:13,909 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 41 mSDsluCounter, 6152 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 7037 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:13,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 7037 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:40:13,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-19 14:40:13,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2021-11-19 14:40:13,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 423 states have (on average 1.6217494089834514) internal successors, (686), 441 states have internal predecessors, (686), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-19 14:40:13,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 899 transitions. [2021-11-19 14:40:13,980 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 899 transitions. Word has length 74 [2021-11-19 14:40:13,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:13,980 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 899 transitions. [2021-11-19 14:40:13,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:40:13,981 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 899 transitions. [2021-11-19 14:40:13,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 14:40:13,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:13,984 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:14,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:14,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:14,205 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:14,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:14,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1851808175, now seen corresponding path program 1 times [2021-11-19 14:40:14,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:14,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279963098] [2021-11-19 14:40:14,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:14,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:14,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:14,208 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:14,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:40:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:14,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:40:14,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:40:14,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:40:15,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:15,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279963098] [2021-11-19 14:40:15,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279963098] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:15,196 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:15,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-19 14:40:15,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169581365] [2021-11-19 14:40:15,197 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:15,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:40:15,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:15,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:40:15,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:40:15,199 INFO L87 Difference]: Start difference. First operand 557 states and 899 transitions. Second operand has 10 states, 10 states have (on average 9.0) internal successors, (90), 8 states have internal predecessors, (90), 6 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-19 14:40:18,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:18,996 INFO L93 Difference]: Finished difference Result 2185 states and 3614 transitions. [2021-11-19 14:40:18,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:40:18,998 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 8 states have internal predecessors, (90), 6 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 75 [2021-11-19 14:40:18,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:19,018 INFO L225 Difference]: With dead ends: 2185 [2021-11-19 14:40:19,018 INFO L226 Difference]: Without dead ends: 1646 [2021-11-19 14:40:19,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:40:19,027 INFO L933 BasicCegarLoop]: 1193 mSDtfsCounter, 2381 mSDsluCounter, 6379 mSDsCounter, 0 mSdLazyCounter, 1868 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2402 SdHoareTripleChecker+Valid, 7572 SdHoareTripleChecker+Invalid, 2189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:19,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2402 Valid, 7572 Invalid, 2189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1868 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-19 14:40:19,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-11-19 14:40:19,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1628. [2021-11-19 14:40:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1248 states have (on average 1.6009615384615385) internal successors, (1998), 1302 states have internal predecessors, (1998), 306 states have call successors, (306), 75 states have call predecessors, (306), 73 states have return successors, (325), 292 states have call predecessors, (325), 301 states have call successors, (325) [2021-11-19 14:40:19,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 2629 transitions. [2021-11-19 14:40:19,171 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 2629 transitions. Word has length 75 [2021-11-19 14:40:19,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:19,172 INFO L470 AbstractCegarLoop]: Abstraction has 1628 states and 2629 transitions. [2021-11-19 14:40:19,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 8 states have internal predecessors, (90), 6 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-19 14:40:19,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 2629 transitions. [2021-11-19 14:40:19,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 14:40:19,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:19,175 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:19,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:19,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:19,386 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:19,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:19,387 INFO L85 PathProgramCache]: Analyzing trace with hash -458912943, now seen corresponding path program 1 times [2021-11-19 14:40:19,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:19,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897568348] [2021-11-19 14:40:19,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:19,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:19,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:19,389 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:19,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:40:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:19,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:40:19,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:40:20,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:40:20,389 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:20,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897568348] [2021-11-19 14:40:20,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897568348] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:40:20,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:40:20,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-19 14:40:20,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291585072] [2021-11-19 14:40:20,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:20,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:40:20,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:20,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:40:20,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:40:20,393 INFO L87 Difference]: Start difference. First operand 1628 states and 2629 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 14:40:21,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:21,503 INFO L93 Difference]: Finished difference Result 4366 states and 7187 transitions. [2021-11-19 14:40:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:40:21,505 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 75 [2021-11-19 14:40:21,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:21,538 INFO L225 Difference]: With dead ends: 4366 [2021-11-19 14:40:21,538 INFO L226 Difference]: Without dead ends: 2756 [2021-11-19 14:40:21,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:40:21,555 INFO L933 BasicCegarLoop]: 1158 mSDtfsCounter, 862 mSDsluCounter, 4137 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 5295 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:21,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 5295 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:40:21,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-11-19 14:40:21,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 2738. [2021-11-19 14:40:21,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2738 states, 2105 states have (on average 1.6104513064133017) internal successors, (3390), 2193 states have internal predecessors, (3390), 505 states have call successors, (505), 122 states have call predecessors, (505), 127 states have return successors, (587), 493 states have call predecessors, (587), 498 states have call successors, (587) [2021-11-19 14:40:21,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2738 states to 2738 states and 4482 transitions. [2021-11-19 14:40:21,732 INFO L78 Accepts]: Start accepts. Automaton has 2738 states and 4482 transitions. Word has length 75 [2021-11-19 14:40:21,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:21,733 INFO L470 AbstractCegarLoop]: Abstraction has 2738 states and 4482 transitions. [2021-11-19 14:40:21,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 14:40:21,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2738 states and 4482 transitions. [2021-11-19 14:40:21,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-19 14:40:21,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:21,736 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:21,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:21,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:21,952 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:21,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:21,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1359357280, now seen corresponding path program 1 times [2021-11-19 14:40:21,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:21,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687094876] [2021-11-19 14:40:21,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:21,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:21,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:21,954 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:21,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:40:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:22,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:40:22,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:40:22,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:22,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:40:22,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:22,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687094876] [2021-11-19 14:40:22,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687094876] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:22,860 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:22,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:40:22,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708995686] [2021-11-19 14:40:22,861 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:22,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:40:22,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:22,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:40:22,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:40:22,865 INFO L87 Difference]: Start difference. First operand 2738 states and 4482 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-19 14:40:24,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:24,620 INFO L93 Difference]: Finished difference Result 8513 states and 14700 transitions. [2021-11-19 14:40:24,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:40:24,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 78 [2021-11-19 14:40:24,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:24,684 INFO L225 Difference]: With dead ends: 8513 [2021-11-19 14:40:24,684 INFO L226 Difference]: Without dead ends: 5793 [2021-11-19 14:40:24,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:40:24,717 INFO L933 BasicCegarLoop]: 1153 mSDtfsCounter, 978 mSDsluCounter, 3984 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 5137 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:24,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1008 Valid, 5137 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:40:24,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5793 states. [2021-11-19 14:40:25,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5793 to 5405. [2021-11-19 14:40:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5405 states, 4157 states have (on average 1.5997113302862642) internal successors, (6650), 4326 states have internal predecessors, (6650), 980 states have call successors, (980), 241 states have call predecessors, (980), 267 states have return successors, (1413), 979 states have call predecessors, (1413), 968 states have call successors, (1413) [2021-11-19 14:40:25,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5405 states to 5405 states and 9043 transitions. [2021-11-19 14:40:25,171 INFO L78 Accepts]: Start accepts. Automaton has 5405 states and 9043 transitions. Word has length 78 [2021-11-19 14:40:25,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:25,172 INFO L470 AbstractCegarLoop]: Abstraction has 5405 states and 9043 transitions. [2021-11-19 14:40:25,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-19 14:40:25,173 INFO L276 IsEmpty]: Start isEmpty. Operand 5405 states and 9043 transitions. [2021-11-19 14:40:25,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-19 14:40:25,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:25,174 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:25,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:25,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:25,388 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:25,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:25,389 INFO L85 PathProgramCache]: Analyzing trace with hash -599142051, now seen corresponding path program 1 times [2021-11-19 14:40:25,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:25,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657507060] [2021-11-19 14:40:25,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:25,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:25,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:25,392 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:25,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:40:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:25,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:40:25,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:25,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:40:25,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:40:26,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:26,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657507060] [2021-11-19 14:40:26,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1657507060] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:26,192 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:26,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:40:26,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493747206] [2021-11-19 14:40:26,193 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:26,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:40:26,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:26,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:40:26,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:40:26,194 INFO L87 Difference]: Start difference. First operand 5405 states and 9043 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:40:26,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:26,592 INFO L93 Difference]: Finished difference Result 10822 states and 18341 transitions. [2021-11-19 14:40:26,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:40:26,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 79 [2021-11-19 14:40:26,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:26,652 INFO L225 Difference]: With dead ends: 10822 [2021-11-19 14:40:26,652 INFO L226 Difference]: Without dead ends: 5435 [2021-11-19 14:40:26,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:40:26,691 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 30 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:26,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1742 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:40:26,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5435 states. [2021-11-19 14:40:27,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5435 to 5425. [2021-11-19 14:40:27,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5425 states, 4172 states have (on average 1.5963566634707573) internal successors, (6660), 4341 states have internal predecessors, (6660), 980 states have call successors, (980), 251 states have call predecessors, (980), 272 states have return successors, (1388), 974 states have call predecessors, (1388), 968 states have call successors, (1388) [2021-11-19 14:40:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5425 states to 5425 states and 9028 transitions. [2021-11-19 14:40:27,113 INFO L78 Accepts]: Start accepts. Automaton has 5425 states and 9028 transitions. Word has length 79 [2021-11-19 14:40:27,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:27,113 INFO L470 AbstractCegarLoop]: Abstraction has 5425 states and 9028 transitions. [2021-11-19 14:40:27,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:40:27,114 INFO L276 IsEmpty]: Start isEmpty. Operand 5425 states and 9028 transitions. [2021-11-19 14:40:27,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-19 14:40:27,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:27,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:27,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:27,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:27,337 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:27,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:27,338 INFO L85 PathProgramCache]: Analyzing trace with hash 687934125, now seen corresponding path program 1 times [2021-11-19 14:40:27,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:27,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553356266] [2021-11-19 14:40:27,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:27,339 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:27,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:27,339 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:27,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:40:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:27,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:40:27,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:27,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:40:27,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:28,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:40:28,311 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:28,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553356266] [2021-11-19 14:40:28,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553356266] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:28,311 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:28,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:40:28,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361762077] [2021-11-19 14:40:28,311 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:28,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:40:28,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:28,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:40:28,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:40:28,313 INFO L87 Difference]: Start difference. First operand 5425 states and 9028 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 14:40:30,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:30,509 INFO L93 Difference]: Finished difference Result 17061 states and 30662 transitions. [2021-11-19 14:40:30,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:40:30,511 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 87 [2021-11-19 14:40:30,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:30,710 INFO L225 Difference]: With dead ends: 17061 [2021-11-19 14:40:30,710 INFO L226 Difference]: Without dead ends: 11654 [2021-11-19 14:40:30,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:40:30,749 INFO L933 BasicCegarLoop]: 1161 mSDtfsCounter, 952 mSDsluCounter, 4716 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 5877 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:30,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [973 Valid, 5877 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 14:40:30,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11654 states. [2021-11-19 14:40:31,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11654 to 10834. [2021-11-19 14:40:31,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10834 states, 8331 states have (on average 1.5890049213779858) internal successors, (13238), 8667 states have internal predecessors, (13238), 1935 states have call successors, (1935), 499 states have call predecessors, (1935), 567 states have return successors, (3495), 1951 states have call predecessors, (3495), 1913 states have call successors, (3495) [2021-11-19 14:40:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10834 states to 10834 states and 18668 transitions. [2021-11-19 14:40:31,761 INFO L78 Accepts]: Start accepts. Automaton has 10834 states and 18668 transitions. Word has length 87 [2021-11-19 14:40:31,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:31,761 INFO L470 AbstractCegarLoop]: Abstraction has 10834 states and 18668 transitions. [2021-11-19 14:40:31,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 14:40:31,763 INFO L276 IsEmpty]: Start isEmpty. Operand 10834 states and 18668 transitions. [2021-11-19 14:40:31,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 14:40:31,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:31,765 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:31,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:31,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:31,980 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:31,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:31,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1924648248, now seen corresponding path program 1 times [2021-11-19 14:40:31,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:31,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256074654] [2021-11-19 14:40:31,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:31,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:31,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:31,983 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:31,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:40:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:32,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:40:32,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:40:32,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:32,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:40:32,772 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:32,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256074654] [2021-11-19 14:40:32,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256074654] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:32,772 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:32,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:40:32,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376584720] [2021-11-19 14:40:32,773 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:32,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:40:32,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:32,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:40:32,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:40:32,776 INFO L87 Difference]: Start difference. First operand 10834 states and 18668 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:40:33,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:33,340 INFO L93 Difference]: Finished difference Result 21770 states and 38110 transitions. [2021-11-19 14:40:33,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:40:33,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 88 [2021-11-19 14:40:33,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:33,536 INFO L225 Difference]: With dead ends: 21770 [2021-11-19 14:40:33,537 INFO L226 Difference]: Without dead ends: 10954 [2021-11-19 14:40:33,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:40:33,609 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 21 mSDsluCounter, 2590 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3466 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:33,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3466 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:40:33,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10954 states. [2021-11-19 14:40:34,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10954 to 10934. [2021-11-19 14:40:34,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10934 states, 8421 states have (on average 1.583897399358746) internal successors, (13338), 8737 states have internal predecessors, (13338), 1935 states have call successors, (1935), 539 states have call predecessors, (1935), 577 states have return successors, (3457), 1941 states have call predecessors, (3457), 1913 states have call successors, (3457) [2021-11-19 14:40:34,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10934 states to 10934 states and 18730 transitions. [2021-11-19 14:40:34,435 INFO L78 Accepts]: Start accepts. Automaton has 10934 states and 18730 transitions. Word has length 88 [2021-11-19 14:40:34,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:34,436 INFO L470 AbstractCegarLoop]: Abstraction has 10934 states and 18730 transitions. [2021-11-19 14:40:34,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:40:34,437 INFO L276 IsEmpty]: Start isEmpty. Operand 10934 states and 18730 transitions. [2021-11-19 14:40:34,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 14:40:34,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:34,439 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:34,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:34,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:34,662 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:34,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:34,663 INFO L85 PathProgramCache]: Analyzing trace with hash -18431621, now seen corresponding path program 1 times [2021-11-19 14:40:34,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:34,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905624980] [2021-11-19 14:40:34,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:34,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:34,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:34,665 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:34,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:40:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:34,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:40:34,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:40:35,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:40:35,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:35,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905624980] [2021-11-19 14:40:35,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905624980] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:35,566 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:35,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:40:35,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327831158] [2021-11-19 14:40:35,566 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:35,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:40:35,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:35,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:40:35,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:40:35,568 INFO L87 Difference]: Start difference. First operand 10934 states and 18730 transitions. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 14:40:37,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:37,691 INFO L93 Difference]: Finished difference Result 34337 states and 65655 transitions. [2021-11-19 14:40:37,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:40:37,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) Word has length 97 [2021-11-19 14:40:37,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:37,945 INFO L225 Difference]: With dead ends: 34337 [2021-11-19 14:40:37,945 INFO L226 Difference]: Without dead ends: 23421 [2021-11-19 14:40:38,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:40:38,056 INFO L933 BasicCegarLoop]: 1185 mSDtfsCounter, 926 mSDsluCounter, 4128 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 5313 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:38,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [945 Valid, 5313 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:40:38,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23421 states. [2021-11-19 14:40:39,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23421 to 21937. [2021-11-19 14:40:39,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21937 states, 16889 states have (on average 1.5772988335603055) internal successors, (26639), 17529 states have internal predecessors, (26639), 3850 states have call successors, (3850), 1075 states have call predecessors, (3850), 1197 states have return successors, (9038), 3900 states have call predecessors, (9038), 3808 states have call successors, (9038) [2021-11-19 14:40:40,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21937 states to 21937 states and 39527 transitions. [2021-11-19 14:40:40,335 INFO L78 Accepts]: Start accepts. Automaton has 21937 states and 39527 transitions. Word has length 97 [2021-11-19 14:40:40,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:40,336 INFO L470 AbstractCegarLoop]: Abstraction has 21937 states and 39527 transitions. [2021-11-19 14:40:40,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 14:40:40,337 INFO L276 IsEmpty]: Start isEmpty. Operand 21937 states and 39527 transitions. [2021-11-19 14:40:40,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-19 14:40:40,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:40,339 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:40,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:40,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:40,552 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:40,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:40,553 INFO L85 PathProgramCache]: Analyzing trace with hash 689445490, now seen corresponding path program 1 times [2021-11-19 14:40:40,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:40,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010943456] [2021-11-19 14:40:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:40,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:40,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:40,556 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:40,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:40:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:41,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:40:41,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:40:41,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:40:41,650 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:41,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010943456] [2021-11-19 14:40:41,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010943456] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:41,650 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:41,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:40:41,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396258354] [2021-11-19 14:40:41,651 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:41,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:40:41,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:41,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:40:41,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:40:41,653 INFO L87 Difference]: Start difference. First operand 21937 states and 39527 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 14:40:42,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:42,961 INFO L93 Difference]: Finished difference Result 44096 states and 81214 transitions. [2021-11-19 14:40:42,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:40:42,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 98 [2021-11-19 14:40:42,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:43,223 INFO L225 Difference]: With dead ends: 44096 [2021-11-19 14:40:43,224 INFO L226 Difference]: Without dead ends: 22177 [2021-11-19 14:40:43,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:40:43,576 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 21 mSDsluCounter, 2590 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3466 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:43,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3466 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:40:43,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22177 states. [2021-11-19 14:40:44,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22177 to 22137. [2021-11-19 14:40:45,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22137 states, 17069 states have (on average 1.5723826820551878) internal successors, (26839), 17709 states have internal predecessors, (26839), 3850 states have call successors, (3850), 1115 states have call predecessors, (3850), 1217 states have return successors, (8986), 3880 states have call predecessors, (8986), 3808 states have call successors, (8986) [2021-11-19 14:40:45,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22137 states to 22137 states and 39675 transitions. [2021-11-19 14:40:45,336 INFO L78 Accepts]: Start accepts. Automaton has 22137 states and 39675 transitions. Word has length 98 [2021-11-19 14:40:45,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:45,337 INFO L470 AbstractCegarLoop]: Abstraction has 22137 states and 39675 transitions. [2021-11-19 14:40:45,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 14:40:45,337 INFO L276 IsEmpty]: Start isEmpty. Operand 22137 states and 39675 transitions. [2021-11-19 14:40:45,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-19 14:40:45,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:45,340 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:45,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:45,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:45,562 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:45,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:45,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1299400590, now seen corresponding path program 1 times [2021-11-19 14:40:45,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:45,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899679804] [2021-11-19 14:40:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:45,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:45,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:45,565 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:45,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:40:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:46,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:40:46,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:40:46,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:40:46,785 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:46,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899679804] [2021-11-19 14:40:46,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899679804] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:46,786 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:46,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:40:46,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187635724] [2021-11-19 14:40:46,787 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:46,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:40:46,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:46,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:40:46,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:40:46,789 INFO L87 Difference]: Start difference. First operand 22137 states and 39675 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 14:40:50,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:50,837 INFO L93 Difference]: Finished difference Result 69291 states and 145263 transitions. [2021-11-19 14:40:50,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:40:50,839 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 108 [2021-11-19 14:40:50,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:51,739 INFO L225 Difference]: With dead ends: 69291 [2021-11-19 14:40:51,740 INFO L226 Difference]: Without dead ends: 47172 [2021-11-19 14:40:52,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:40:52,000 INFO L933 BasicCegarLoop]: 1158 mSDtfsCounter, 924 mSDsluCounter, 4912 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 6070 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:52,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 6070 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 14:40:52,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47172 states. [2021-11-19 14:40:55,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47172 to 44488. [2021-11-19 14:40:55,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44488 states, 34285 states have (on average 1.566632638179962) internal successors, (53712), 35593 states have internal predecessors, (53712), 7685 states have call successors, (7685), 2227 states have call predecessors, (7685), 2517 states have return successors, (24311), 7803 states have call predecessors, (24311), 7603 states have call successors, (24311) [2021-11-19 14:40:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44488 states to 44488 states and 85708 transitions. [2021-11-19 14:40:56,577 INFO L78 Accepts]: Start accepts. Automaton has 44488 states and 85708 transitions. Word has length 108 [2021-11-19 14:40:56,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:56,578 INFO L470 AbstractCegarLoop]: Abstraction has 44488 states and 85708 transitions. [2021-11-19 14:40:56,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 14:40:56,579 INFO L276 IsEmpty]: Start isEmpty. Operand 44488 states and 85708 transitions. [2021-11-19 14:40:56,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-19 14:40:56,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:56,581 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:56,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:56,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:56,796 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:56,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:56,797 INFO L85 PathProgramCache]: Analyzing trace with hash -855641763, now seen corresponding path program 1 times [2021-11-19 14:40:56,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:56,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457396184] [2021-11-19 14:40:56,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:56,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:56,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:56,812 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:56,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:40:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:57,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:40:57,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:40:57,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 14:40:58,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:58,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457396184] [2021-11-19 14:40:58,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457396184] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:58,154 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:58,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-19 14:40:58,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519584880] [2021-11-19 14:40:58,155 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:58,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:40:58,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:58,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:40:58,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:40:58,156 INFO L87 Difference]: Start difference. First operand 44488 states and 85708 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-19 14:41:04,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:04,301 INFO L93 Difference]: Finished difference Result 135193 states and 261648 transitions. [2021-11-19 14:41:04,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:41:04,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 109 [2021-11-19 14:41:04,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:05,242 INFO L225 Difference]: With dead ends: 135193 [2021-11-19 14:41:05,242 INFO L226 Difference]: Without dead ends: 91852 [2021-11-19 14:41:05,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:41:05,927 INFO L933 BasicCegarLoop]: 1259 mSDtfsCounter, 1649 mSDsluCounter, 2395 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1649 SdHoareTripleChecker+Valid, 3654 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:05,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1649 Valid, 3654 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 14:41:06,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91852 states. [2021-11-19 14:41:11,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91852 to 86419. [2021-11-19 14:41:11,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86419 states, 67499 states have (on average 1.5666602468184714) internal successors, (105748), 69313 states have internal predecessors, (105748), 14197 states have call successors, (14197), 4295 states have call predecessors, (14197), 4722 states have return successors, (48576), 14014 states have call predecessors, (48576), 14030 states have call successors, (48576) [2021-11-19 14:41:12,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86419 states to 86419 states and 168521 transitions. [2021-11-19 14:41:12,957 INFO L78 Accepts]: Start accepts. Automaton has 86419 states and 168521 transitions. Word has length 109 [2021-11-19 14:41:12,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:12,957 INFO L470 AbstractCegarLoop]: Abstraction has 86419 states and 168521 transitions. [2021-11-19 14:41:12,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-19 14:41:12,958 INFO L276 IsEmpty]: Start isEmpty. Operand 86419 states and 168521 transitions. [2021-11-19 14:41:12,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 14:41:12,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:12,965 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:12,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-19 14:41:13,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:13,180 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:13,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:13,181 INFO L85 PathProgramCache]: Analyzing trace with hash 2081727175, now seen corresponding path program 1 times [2021-11-19 14:41:13,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:13,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220254211] [2021-11-19 14:41:13,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:13,182 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:13,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:13,183 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:13,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95df1ff2-0bd3-4c5d-90d6-ec253a015bd0/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:41:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:13,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:41:13,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:41:14,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 14:41:14,432 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:14,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220254211] [2021-11-19 14:41:14,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220254211] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:14,432 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:14,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2021-11-19 14:41:14,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823678306] [2021-11-19 14:41:14,433 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:14,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:41:14,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:14,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:41:14,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:41:14,434 INFO L87 Difference]: Start difference. First operand 86419 states and 168521 transitions. Second operand has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 4 states have call successors, (39), 4 states have call predecessors, (39), 3 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-19 14:41:22,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:22,764 INFO L93 Difference]: Finished difference Result 178331 states and 360452 transitions. [2021-11-19 14:41:22,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:41:22,765 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 4 states have call successors, (39), 4 states have call predecessors, (39), 3 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) Word has length 156 [2021-11-19 14:41:22,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:23,940 INFO L225 Difference]: With dead ends: 178331 [2021-11-19 14:41:23,940 INFO L226 Difference]: Without dead ends: 91930 [2021-11-19 14:41:25,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:41:25,072 INFO L933 BasicCegarLoop]: 1010 mSDtfsCounter, 1166 mSDsluCounter, 3514 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1169 SdHoareTripleChecker+Valid, 4524 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:25,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1169 Valid, 4524 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:41:25,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91930 states.