./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/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_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/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_456678ae-89ab-47fd-a537-fc604b1d39e2/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 e7c9485412041f5ced738777edbcc586e5ce326d6f265b136a50fe41e5db19fb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:46:27,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:46:27,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:46:27,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:46:27,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:46:27,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:46:27,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:46:27,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:46:27,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:46:27,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:46:27,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:46:27,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:46:27,352 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:46:27,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:46:27,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:46:27,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:46:27,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:46:27,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:46:27,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:46:27,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:46:27,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:46:27,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:46:27,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:46:27,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:46:27,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:46:27,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:46:27,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:46:27,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:46:27,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:46:27,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:46:27,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:46:27,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:46:27,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:46:27,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:46:27,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:46:27,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:46:27,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:46:27,421 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:46:27,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:46:27,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:46:27,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:46:27,424 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:46:27,473 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:46:27,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:46:27,475 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:46:27,475 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:46:27,475 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:46:27,476 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:46:27,476 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:46:27,476 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:46:27,476 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:46:27,477 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:46:27,478 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:46:27,478 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:46:27,478 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:46:27,478 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:46:27,479 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:46:27,479 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:46:27,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:46:27,480 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:46:27,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:46:27,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:46:27,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:46:27,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:46:27,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:46:27,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:46:27,481 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:46:27,481 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:46:27,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:46:27,482 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:46:27,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:46:27,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:46:27,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:46:27,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:46:27,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:46:27,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:46:27,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:46:27,485 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:46:27,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:46:27,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:46:27,486 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:46:27,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:46:27,486 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_456678ae-89ab-47fd-a537-fc604b1d39e2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7c9485412041f5ced738777edbcc586e5ce326d6f265b136a50fe41e5db19fb [2021-11-19 14:46:27,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:46:27,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:46:27,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:46:27,882 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:46:27,883 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:46:27,885 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c [2021-11-19 14:46:27,949 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/data/4c36c3663/93dae709b8f54b6ca39a5ad36931b63e/FLAGa8fca0eaf [2021-11-19 14:46:28,679 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:46:28,680 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c [2021-11-19 14:46:28,704 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/data/4c36c3663/93dae709b8f54b6ca39a5ad36931b63e/FLAGa8fca0eaf [2021-11-19 14:46:28,872 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/data/4c36c3663/93dae709b8f54b6ca39a5ad36931b63e [2021-11-19 14:46:28,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:46:28,879 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:46:28,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:46:28,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:46:28,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:46:28,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:46:28" (1/1) ... [2021-11-19 14:46:28,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c123a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:28, skipping insertion in model container [2021-11-19 14:46:28,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:46:28" (1/1) ... [2021-11-19 14:46:28,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:46:29,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:46:29,165 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_456678ae-89ab-47fd-a537-fc604b1d39e2/sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c[1546,1559] [2021-11-19 14:46:29,650 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:46:29,663 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 14:46:29,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@20c56487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:29, skipping insertion in model container [2021-11-19 14:46:29,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:46:29,664 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:46:29,667 INFO L158 Benchmark]: Toolchain (without parser) took 786.36ms. Allocated memory was 88.1MB in the beginning and 109.1MB in the end (delta: 21.0MB). Free memory was 55.0MB in the beginning and 80.3MB in the end (delta: -25.3MB). Peak memory consumption was 33.9MB. Max. memory is 16.1GB. [2021-11-19 14:46:29,668 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 88.1MB. Free memory was 56.1MB in the beginning and 56.0MB in the end (delta: 45.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:46:29,669 INFO L158 Benchmark]: CACSL2BoogieTranslator took 779.52ms. Allocated memory was 88.1MB in the beginning and 109.1MB in the end (delta: 21.0MB). Free memory was 54.8MB in the beginning and 81.0MB in the end (delta: -26.2MB). Peak memory consumption was 33.9MB. Max. memory is 16.1GB. [2021-11-19 14:46:29,671 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 88.1MB. Free memory was 56.1MB in the beginning and 56.0MB in the end (delta: 45.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 779.52ms. Allocated memory was 88.1MB in the beginning and 109.1MB in the end (delta: 21.0MB). Free memory was 54.8MB in the beginning and 81.0MB in the end (delta: -26.2MB). Peak memory consumption was 33.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1455]: 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_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/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_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/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_456678ae-89ab-47fd-a537-fc604b1d39e2/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 e7c9485412041f5ced738777edbcc586e5ce326d6f265b136a50fe41e5db19fb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:46:32,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:46:32,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:46:32,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:46:32,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:46:32,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:46:32,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:46:32,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:46:32,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:46:32,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:46:32,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:46:32,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:46:32,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:46:32,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:46:32,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:46:32,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:46:32,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:46:32,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:46:32,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:46:32,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:46:32,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:46:32,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:46:32,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:46:32,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:46:32,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:46:32,259 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:46:32,259 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:46:32,261 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:46:32,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:46:32,263 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:46:32,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:46:32,265 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:46:32,266 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:46:32,267 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:46:32,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:46:32,269 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:46:32,270 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:46:32,270 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:46:32,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:46:32,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:46:32,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:46:32,276 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:46:32,331 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:46:32,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:46:32,336 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:46:32,336 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:46:32,337 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:46:32,337 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:46:32,337 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:46:32,337 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:46:32,338 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:46:32,338 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:46:32,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:46:32,341 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:46:32,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:46:32,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:46:32,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:46:32,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:46:32,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:46:32,343 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:46:32,343 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:46:32,343 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:46:32,343 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:46:32,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:46:32,344 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:46:32,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:46:32,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:46:32,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:46:32,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:46:32,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:46:32,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:46:32,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:46:32,346 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:46:32,347 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:46:32,347 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:46:32,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:46:32,348 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:46:32,348 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:46:32,348 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_456678ae-89ab-47fd-a537-fc604b1d39e2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7c9485412041f5ced738777edbcc586e5ce326d6f265b136a50fe41e5db19fb [2021-11-19 14:46:32,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:46:32,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:46:32,843 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:46:32,845 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:46:32,846 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:46:32,848 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c [2021-11-19 14:46:32,932 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/data/67b8c5b54/f9b3907ce2ea4449a14b6ff00b971349/FLAG1edbad2a7 [2021-11-19 14:46:33,662 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:46:33,663 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c [2021-11-19 14:46:33,688 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/data/67b8c5b54/f9b3907ce2ea4449a14b6ff00b971349/FLAG1edbad2a7 [2021-11-19 14:46:33,806 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/data/67b8c5b54/f9b3907ce2ea4449a14b6ff00b971349 [2021-11-19 14:46:33,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:46:33,810 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:46:33,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:46:33,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:46:33,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:46:33,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:46:33" (1/1) ... [2021-11-19 14:46:33,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d77d455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:33, skipping insertion in model container [2021-11-19 14:46:33,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:46:33" (1/1) ... [2021-11-19 14:46:33,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:46:33,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:46:34,092 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_456678ae-89ab-47fd-a537-fc604b1d39e2/sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c[1546,1559] [2021-11-19 14:46:34,579 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:46:34,593 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:46:34,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:46:34,622 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_456678ae-89ab-47fd-a537-fc604b1d39e2/sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c[1546,1559] [2021-11-19 14:46:34,726 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:46:34,746 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:46:34,763 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_456678ae-89ab-47fd-a537-fc604b1d39e2/sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c[1546,1559] [2021-11-19 14:46:34,933 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:46:34,977 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:46:34,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:34 WrapperNode [2021-11-19 14:46:34,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:46:34,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:46:34,980 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:46:34,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:46:34,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:34" (1/1) ... [2021-11-19 14:46:35,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:34" (1/1) ... [2021-11-19 14:46:35,139 INFO L137 Inliner]: procedures = 99, calls = 354, calls flagged for inlining = 30, calls inlined = 26, statements flattened = 878 [2021-11-19 14:46:35,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:46:35,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:46:35,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:46:35,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:46:35,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:34" (1/1) ... [2021-11-19 14:46:35,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:34" (1/1) ... [2021-11-19 14:46:35,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:34" (1/1) ... [2021-11-19 14:46:35,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:34" (1/1) ... [2021-11-19 14:46:35,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:34" (1/1) ... [2021-11-19 14:46:35,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:34" (1/1) ... [2021-11-19 14:46:35,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:34" (1/1) ... [2021-11-19 14:46:35,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:46:35,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:46:35,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:46:35,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:46:35,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:34" (1/1) ... [2021-11-19 14:46:35,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:46:35,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:46:35,361 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:46:35,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:46:35,409 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-19 14:46:35,409 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-19 14:46:35,410 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2021-11-19 14:46:35,410 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2021-11-19 14:46:35,410 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:46:35,410 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:46:35,410 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:46:35,411 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:46:35,411 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 14:46:35,411 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 14:46:35,411 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:46:35,411 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:46:35,412 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:46:35,412 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:46:35,412 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:46:35,412 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:46:35,412 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 14:46:35,413 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 14:46:35,413 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 14:46:35,413 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 14:46:35,414 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:46:35,414 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:46:35,415 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:46:35,415 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:46:35,415 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-19 14:46:35,415 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-19 14:46:35,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:46:35,416 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-19 14:46:35,416 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-19 14:46:35,416 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 14:46:35,417 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 14:46:35,417 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 14:46:35,417 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 14:46:35,417 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 14:46:35,417 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 14:46:35,418 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:46:35,418 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:46:35,418 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:46:35,418 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:46:35,419 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 14:46:35,419 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 14:46:35,419 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:46:35,419 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:46:35,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:46:35,420 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:46:35,420 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:46:35,420 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:46:35,421 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:46:35,421 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:46:35,422 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:46:35,423 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:46:35,425 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:46:35,425 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:46:35,425 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:46:35,425 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:46:35,426 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:46:35,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:46:35,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:46:35,426 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:46:35,427 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:46:35,427 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-19 14:46:35,427 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-19 14:46:35,673 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:46:35,675 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:46:37,347 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:46:37,376 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:46:37,377 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-19 14:46:37,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:46:37 BoogieIcfgContainer [2021-11-19 14:46:37,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:46:37,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:46:37,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:46:37,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:46:37,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:46:33" (1/3) ... [2021-11-19 14:46:37,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331508bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:46:37, skipping insertion in model container [2021-11-19 14:46:37,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:34" (2/3) ... [2021-11-19 14:46:37,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331508bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:46:37, skipping insertion in model container [2021-11-19 14:46:37,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:46:37" (3/3) ... [2021-11-19 14:46:37,392 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product32.cil.c [2021-11-19 14:46:37,399 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:46:37,399 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:46:37,487 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:46:37,498 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 14:46:37,498 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:46:37,563 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 496 states have (on average 1.6733870967741935) internal successors, (830), 516 states have internal predecessors, (830), 110 states have call successors, (110), 29 states have call predecessors, (110), 29 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) [2021-11-19 14:46:37,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 14:46:37,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:37,603 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:37,603 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:37,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:37,611 INFO L85 PathProgramCache]: Analyzing trace with hash 474929604, now seen corresponding path program 1 times [2021-11-19 14:46:37,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:37,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868489574] [2021-11-19 14:46:37,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:37,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:37,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:37,639 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:37,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:46:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:38,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:46:38,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:46:38,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:46:38,690 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:38,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868489574] [2021-11-19 14:46:38,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868489574] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:46:38,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:46:38,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:46:38,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68912436] [2021-11-19 14:46:38,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:38,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:46:38,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:38,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:46:38,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:46:38,733 INFO L87 Difference]: Start difference. First operand has 637 states, 496 states have (on average 1.6733870967741935) internal successors, (830), 516 states have internal predecessors, (830), 110 states have call successors, (110), 29 states have call predecessors, (110), 29 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:46:38,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:38,947 INFO L93 Difference]: Finished difference Result 1268 states and 2108 transitions. [2021-11-19 14:46:38,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:46:38,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 83 [2021-11-19 14:46:38,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:38,978 INFO L225 Difference]: With dead ends: 1268 [2021-11-19 14:46:38,978 INFO L226 Difference]: Without dead ends: 631 [2021-11-19 14:46:38,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:46:38,994 INFO L933 BasicCegarLoop]: 1023 mSDtfsCounter, 15 mSDsluCounter, 2037 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3060 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:38,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 3060 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:46:39,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-19 14:46:39,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 631. [2021-11-19 14:46:39,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 492 states have (on average 1.6524390243902438) internal successors, (813), 510 states have internal predecessors, (813), 110 states have call successors, (110), 30 states have call predecessors, (110), 28 states have return successors, (107), 104 states have call predecessors, (107), 107 states have call successors, (107) [2021-11-19 14:46:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1030 transitions. [2021-11-19 14:46:39,145 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1030 transitions. Word has length 83 [2021-11-19 14:46:39,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:39,145 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 1030 transitions. [2021-11-19 14:46:39,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:46:39,146 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1030 transitions. [2021-11-19 14:46:39,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 14:46:39,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:39,155 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:39,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:39,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:39,369 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:39,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:39,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2001716048, now seen corresponding path program 1 times [2021-11-19 14:46:39,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:39,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342440917] [2021-11-19 14:46:39,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:39,371 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:39,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:39,373 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:39,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:46:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:39,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:46:39,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:46:39,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:46:40,377 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:40,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342440917] [2021-11-19 14:46:40,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342440917] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:46:40,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:46:40,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:46:40,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484058976] [2021-11-19 14:46:40,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:40,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:46:40,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:40,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:46:40,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:46:40,385 INFO L87 Difference]: Start difference. First operand 631 states and 1030 transitions. Second operand has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:46:40,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:40,733 INFO L93 Difference]: Finished difference Result 1274 states and 2085 transitions. [2021-11-19 14:46:40,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:46:40,735 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 85 [2021-11-19 14:46:40,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:40,743 INFO L225 Difference]: With dead ends: 1274 [2021-11-19 14:46:40,744 INFO L226 Difference]: Without dead ends: 653 [2021-11-19 14:46:40,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 159 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 14:46:40,750 INFO L933 BasicCegarLoop]: 1022 mSDtfsCounter, 119 mSDsluCounter, 5002 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 6024 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:40,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 6024 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:46:40,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-11-19 14:46:40,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 644. [2021-11-19 14:46:40,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 502 states have (on average 1.649402390438247) internal successors, (828), 522 states have internal predecessors, (828), 111 states have call successors, (111), 30 states have call predecessors, (111), 30 states have return successors, (113), 105 states have call predecessors, (113), 108 states have call successors, (113) [2021-11-19 14:46:40,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1052 transitions. [2021-11-19 14:46:40,815 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1052 transitions. Word has length 85 [2021-11-19 14:46:40,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:40,816 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1052 transitions. [2021-11-19 14:46:40,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:46:40,821 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1052 transitions. [2021-11-19 14:46:40,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 14:46:40,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:40,827 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:40,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:41,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:41,033 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:41,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:41,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1546466611, now seen corresponding path program 1 times [2021-11-19 14:46:41,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:41,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1949067857] [2021-11-19 14:46:41,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:41,035 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:41,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:41,036 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:41,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:46:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:41,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:46:41,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:46:41,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:46:42,032 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:42,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1949067857] [2021-11-19 14:46:42,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1949067857] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:46:42,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:46:42,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:46:42,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532925792] [2021-11-19 14:46:42,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:42,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:46:42,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:42,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:46:42,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:46:42,036 INFO L87 Difference]: Start difference. First operand 644 states and 1052 transitions. Second operand has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:46:42,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:42,464 INFO L93 Difference]: Finished difference Result 1294 states and 2118 transitions. [2021-11-19 14:46:42,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:46:42,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 86 [2021-11-19 14:46:42,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:42,479 INFO L225 Difference]: With dead ends: 1294 [2021-11-19 14:46:42,479 INFO L226 Difference]: Without dead ends: 662 [2021-11-19 14:46:42,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 161 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 14:46:42,493 INFO L933 BasicCegarLoop]: 1034 mSDtfsCounter, 105 mSDsluCounter, 5038 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 6072 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:42,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 6072 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:46:42,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-11-19 14:46:42,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 644. [2021-11-19 14:46:42,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 502 states have (on average 1.649402390438247) internal successors, (828), 522 states have internal predecessors, (828), 111 states have call successors, (111), 30 states have call predecessors, (111), 30 states have return successors, (113), 105 states have call predecessors, (113), 108 states have call successors, (113) [2021-11-19 14:46:42,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1052 transitions. [2021-11-19 14:46:42,559 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1052 transitions. Word has length 86 [2021-11-19 14:46:42,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:42,561 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1052 transitions. [2021-11-19 14:46:42,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:46:42,562 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1052 transitions. [2021-11-19 14:46:42,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 14:46:42,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:42,569 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:42,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:42,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:42,785 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:42,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:42,785 INFO L85 PathProgramCache]: Analyzing trace with hash -712971247, now seen corresponding path program 1 times [2021-11-19 14:46:42,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:42,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256754314] [2021-11-19 14:46:42,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:42,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:42,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:42,788 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:42,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:46:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:43,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:46:43,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:46:43,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:46:43,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:43,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256754314] [2021-11-19 14:46:43,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256754314] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:46:43,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:46:43,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-19 14:46:43,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653016881] [2021-11-19 14:46:43,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:43,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:46:43,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:43,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:46:43,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:46:43,522 INFO L87 Difference]: Start difference. First operand 644 states and 1052 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:46:43,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:43,623 INFO L93 Difference]: Finished difference Result 1279 states and 2093 transitions. [2021-11-19 14:46:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:46:43,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2021-11-19 14:46:43,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:43,631 INFO L225 Difference]: With dead ends: 1279 [2021-11-19 14:46:43,631 INFO L226 Difference]: Without dead ends: 645 [2021-11-19 14:46:43,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 167 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 14:46:43,637 INFO L933 BasicCegarLoop]: 1012 mSDtfsCounter, 22 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3027 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:43,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 3027 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:46:43,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-11-19 14:46:43,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2021-11-19 14:46:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 504 states have (on average 1.6488095238095237) internal successors, (831), 523 states have internal predecessors, (831), 110 states have call successors, (110), 31 states have call predecessors, (110), 30 states have return successors, (109), 104 states have call predecessors, (109), 107 states have call successors, (109) [2021-11-19 14:46:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1050 transitions. [2021-11-19 14:46:43,672 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1050 transitions. Word has length 86 [2021-11-19 14:46:43,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:43,672 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1050 transitions. [2021-11-19 14:46:43,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:46:43,673 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1050 transitions. [2021-11-19 14:46:43,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 14:46:43,675 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:43,675 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:43,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:43,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:43,896 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:43,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:43,896 INFO L85 PathProgramCache]: Analyzing trace with hash -2147189279, now seen corresponding path program 1 times [2021-11-19 14:46:43,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:43,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5970836] [2021-11-19 14:46:43,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:43,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:43,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:43,898 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:43,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:46:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:44,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:46:44,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:44,459 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:46:44,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:46:44,797 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:44,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5970836] [2021-11-19 14:46:44,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5970836] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:46:44,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:46:44,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:46:44,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569288168] [2021-11-19 14:46:44,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:44,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:46:44,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:44,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:46:44,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:46:44,800 INFO L87 Difference]: Start difference. First operand 645 states and 1050 transitions. Second operand has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:46:45,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:45,123 INFO L93 Difference]: Finished difference Result 1284 states and 2098 transitions. [2021-11-19 14:46:45,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:46:45,124 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 88 [2021-11-19 14:46:45,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:45,139 INFO L225 Difference]: With dead ends: 1284 [2021-11-19 14:46:45,139 INFO L226 Difference]: Without dead ends: 654 [2021-11-19 14:46:45,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 165 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 14:46:45,150 INFO L933 BasicCegarLoop]: 1025 mSDtfsCounter, 104 mSDsluCounter, 4990 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6015 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:45,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 6015 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:46:45,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-11-19 14:46:45,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 645. [2021-11-19 14:46:45,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 504 states have (on average 1.6488095238095237) internal successors, (831), 523 states have internal predecessors, (831), 110 states have call successors, (110), 31 states have call predecessors, (110), 30 states have return successors, (109), 104 states have call predecessors, (109), 107 states have call successors, (109) [2021-11-19 14:46:45,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1050 transitions. [2021-11-19 14:46:45,188 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1050 transitions. Word has length 88 [2021-11-19 14:46:45,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:45,188 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1050 transitions. [2021-11-19 14:46:45,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:46:45,189 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1050 transitions. [2021-11-19 14:46:45,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-19 14:46:45,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:45,192 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:45,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:45,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:45,409 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:45,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:45,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1261280866, now seen corresponding path program 1 times [2021-11-19 14:46:45,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:45,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042628290] [2021-11-19 14:46:45,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:45,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:45,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:45,412 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:45,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:46:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:45,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:46:45,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:45,951 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:46:45,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:46:46,235 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:46,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042628290] [2021-11-19 14:46:46,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042628290] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:46:46,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:46:46,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:46:46,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2263591] [2021-11-19 14:46:46,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:46,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:46:46,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:46,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:46:46,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:46:46,241 INFO L87 Difference]: Start difference. First operand 645 states and 1050 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:46:46,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:46,502 INFO L93 Difference]: Finished difference Result 1304 states and 2136 transitions. [2021-11-19 14:46:46,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:46:46,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 89 [2021-11-19 14:46:46,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:46,511 INFO L225 Difference]: With dead ends: 1304 [2021-11-19 14:46:46,511 INFO L226 Difference]: Without dead ends: 674 [2021-11-19 14:46:46,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:46:46,521 INFO L933 BasicCegarLoop]: 974 mSDtfsCounter, 112 mSDsluCounter, 1897 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 2871 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:46,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 2871 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:46:46,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-11-19 14:46:46,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 665. [2021-11-19 14:46:46,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 523 states have (on average 1.644359464627151) internal successors, (860), 542 states have internal predecessors, (860), 110 states have call successors, (110), 32 states have call predecessors, (110), 31 states have return successors, (108), 104 states have call predecessors, (108), 107 states have call successors, (108) [2021-11-19 14:46:46,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1078 transitions. [2021-11-19 14:46:46,556 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1078 transitions. Word has length 89 [2021-11-19 14:46:46,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:46,556 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1078 transitions. [2021-11-19 14:46:46,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:46:46,557 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1078 transitions. [2021-11-19 14:46:46,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 14:46:46,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:46,561 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:46,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:46,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:46,778 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:46,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:46,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1064353946, now seen corresponding path program 1 times [2021-11-19 14:46:46,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:46,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739383646] [2021-11-19 14:46:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:46,779 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:46,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:46,780 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:46,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:46:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:47,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:46:47,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:46:47,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:46:47,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:47,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739383646] [2021-11-19 14:46:47,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739383646] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:46:47,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:46:47,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 14:46:47,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813506091] [2021-11-19 14:46:47,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:47,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:46:47,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:47,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:46:47,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:46:47,781 INFO L87 Difference]: Start difference. First operand 665 states and 1078 transitions. Second operand has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:46:48,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:48,020 INFO L93 Difference]: Finished difference Result 1333 states and 2167 transitions. [2021-11-19 14:46:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:46:48,021 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 106 [2021-11-19 14:46:48,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:48,029 INFO L225 Difference]: With dead ends: 1333 [2021-11-19 14:46:48,029 INFO L226 Difference]: Without dead ends: 683 [2021-11-19 14:46:48,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 204 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 14:46:48,035 INFO L933 BasicCegarLoop]: 1013 mSDtfsCounter, 154 mSDsluCounter, 4918 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 5931 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:48,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 5931 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:46:48,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-11-19 14:46:48,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 665. [2021-11-19 14:46:48,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 523 states have (on average 1.644359464627151) internal successors, (860), 542 states have internal predecessors, (860), 110 states have call successors, (110), 32 states have call predecessors, (110), 31 states have return successors, (108), 104 states have call predecessors, (108), 107 states have call successors, (108) [2021-11-19 14:46:48,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1078 transitions. [2021-11-19 14:46:48,093 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1078 transitions. Word has length 106 [2021-11-19 14:46:48,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:48,094 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1078 transitions. [2021-11-19 14:46:48,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:46:48,095 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1078 transitions. [2021-11-19 14:46:48,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-19 14:46:48,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:48,101 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:48,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:48,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:48,301 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:48,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:48,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1081676747, now seen corresponding path program 1 times [2021-11-19 14:46:48,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:48,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747719879] [2021-11-19 14:46:48,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:48,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:48,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:48,304 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:48,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:46:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:48,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:46:48,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:46:49,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:46:49,465 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:49,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747719879] [2021-11-19 14:46:49,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747719879] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:46:49,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:46:49,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:46:49,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252697656] [2021-11-19 14:46:49,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:49,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:46:49,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:49,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:46:49,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:46:49,467 INFO L87 Difference]: Start difference. First operand 665 states and 1078 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:46:49,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:49,806 INFO L93 Difference]: Finished difference Result 1328 states and 2158 transitions. [2021-11-19 14:46:49,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:46:49,807 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 107 [2021-11-19 14:46:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:49,814 INFO L225 Difference]: With dead ends: 1328 [2021-11-19 14:46:49,815 INFO L226 Difference]: Without dead ends: 678 [2021-11-19 14:46:49,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 201 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 14:46:49,821 INFO L933 BasicCegarLoop]: 1003 mSDtfsCounter, 112 mSDsluCounter, 5911 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 6914 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:49,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 6914 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:46:49,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-11-19 14:46:49,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 669. [2021-11-19 14:46:49,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 527 states have (on average 1.6394686907020872) internal successors, (864), 546 states have internal predecessors, (864), 110 states have call successors, (110), 32 states have call predecessors, (110), 31 states have return successors, (108), 104 states have call predecessors, (108), 107 states have call successors, (108) [2021-11-19 14:46:49,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1082 transitions. [2021-11-19 14:46:49,854 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1082 transitions. Word has length 107 [2021-11-19 14:46:49,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:49,855 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1082 transitions. [2021-11-19 14:46:49,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:46:49,855 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1082 transitions. [2021-11-19 14:46:49,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-19 14:46:49,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:49,859 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:49,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:50,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:50,061 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:50,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:50,061 INFO L85 PathProgramCache]: Analyzing trace with hash -310162653, now seen corresponding path program 1 times [2021-11-19 14:46:50,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:50,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803066336] [2021-11-19 14:46:50,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:50,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:50,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:50,063 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:50,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:46:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:50,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:46:50,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:46:50,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:46:51,085 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:51,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803066336] [2021-11-19 14:46:51,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803066336] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:46:51,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:46:51,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:46:51,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652049858] [2021-11-19 14:46:51,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:51,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:46:51,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:51,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:46:51,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:46:51,088 INFO L87 Difference]: Start difference. First operand 669 states and 1082 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:46:51,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:51,476 INFO L93 Difference]: Finished difference Result 1338 states and 2170 transitions. [2021-11-19 14:46:51,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:46:51,478 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 92 [2021-11-19 14:46:51,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:51,488 INFO L225 Difference]: With dead ends: 1338 [2021-11-19 14:46:51,488 INFO L226 Difference]: Without dead ends: 684 [2021-11-19 14:46:51,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:46:51,498 INFO L933 BasicCegarLoop]: 1005 mSDtfsCounter, 108 mSDsluCounter, 5917 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6922 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:51,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6922 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:46:51,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-11-19 14:46:51,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 675. [2021-11-19 14:46:51,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 533 states have (on average 1.6322701688555348) internal successors, (870), 552 states have internal predecessors, (870), 110 states have call successors, (110), 32 states have call predecessors, (110), 31 states have return successors, (108), 104 states have call predecessors, (108), 107 states have call successors, (108) [2021-11-19 14:46:51,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1088 transitions. [2021-11-19 14:46:51,533 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1088 transitions. Word has length 92 [2021-11-19 14:46:51,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:51,533 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1088 transitions. [2021-11-19 14:46:51,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:46:51,534 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1088 transitions. [2021-11-19 14:46:51,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-19 14:46:51,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:51,537 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:51,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:51,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:51,752 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:51,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:51,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1224659792, now seen corresponding path program 1 times [2021-11-19 14:46:51,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:51,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573693828] [2021-11-19 14:46:51,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:51,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:51,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:51,755 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:51,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:46:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:52,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:46:52,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:46:52,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:52,831 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:46:52,831 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:52,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573693828] [2021-11-19 14:46:52,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573693828] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:46:52,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:46:52,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:46:52,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79707561] [2021-11-19 14:46:52,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:52,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:46:52,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:52,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:46:52,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:46:52,834 INFO L87 Difference]: Start difference. First operand 675 states and 1088 transitions. Second operand has 8 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:46:53,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:53,212 INFO L93 Difference]: Finished difference Result 1352 states and 2186 transitions. [2021-11-19 14:46:53,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:46:53,214 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2021-11-19 14:46:53,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:53,221 INFO L225 Difference]: With dead ends: 1352 [2021-11-19 14:46:53,221 INFO L226 Difference]: Without dead ends: 692 [2021-11-19 14:46:53,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:46:53,226 INFO L933 BasicCegarLoop]: 1005 mSDtfsCounter, 108 mSDsluCounter, 5917 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6922 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:53,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6922 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:46:53,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-11-19 14:46:53,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 683. [2021-11-19 14:46:53,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 541 states have (on average 1.6229205175600738) internal successors, (878), 560 states have internal predecessors, (878), 110 states have call successors, (110), 32 states have call predecessors, (110), 31 states have return successors, (108), 104 states have call predecessors, (108), 107 states have call successors, (108) [2021-11-19 14:46:53,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1096 transitions. [2021-11-19 14:46:53,261 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1096 transitions. Word has length 109 [2021-11-19 14:46:53,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:53,261 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 1096 transitions. [2021-11-19 14:46:53,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:46:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1096 transitions. [2021-11-19 14:46:53,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-19 14:46:53,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:53,265 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:53,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:53,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:53,489 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:53,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:53,489 INFO L85 PathProgramCache]: Analyzing trace with hash 2076857877, now seen corresponding path program 1 times [2021-11-19 14:46:53,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:53,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766952143] [2021-11-19 14:46:53,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:53,490 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:53,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:53,491 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:53,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:46:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:53,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:46:53,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:46:54,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:46:54,457 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:54,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766952143] [2021-11-19 14:46:54,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766952143] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:54,458 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:46:54,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:46:54,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720488854] [2021-11-19 14:46:54,459 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:54,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:46:54,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:46:54,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:46:54,460 INFO L87 Difference]: Start difference. First operand 683 states and 1096 transitions. Second operand has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:46:54,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:54,690 INFO L93 Difference]: Finished difference Result 1291 states and 2070 transitions. [2021-11-19 14:46:54,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:46:54,691 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 110 [2021-11-19 14:46:54,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:54,699 INFO L225 Difference]: With dead ends: 1291 [2021-11-19 14:46:54,699 INFO L226 Difference]: Without dead ends: 701 [2021-11-19 14:46:54,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 210 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 14:46:54,704 INFO L933 BasicCegarLoop]: 1013 mSDtfsCounter, 100 mSDsluCounter, 4966 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 5979 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:54,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 5979 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:46:54,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-11-19 14:46:54,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 690. [2021-11-19 14:46:54,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 545 states have (on average 1.618348623853211) internal successors, (882), 566 states have internal predecessors, (882), 111 states have call successors, (111), 32 states have call predecessors, (111), 33 states have return successors, (112), 105 states have call predecessors, (112), 108 states have call successors, (112) [2021-11-19 14:46:54,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1105 transitions. [2021-11-19 14:46:54,736 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1105 transitions. Word has length 110 [2021-11-19 14:46:54,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:54,736 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 1105 transitions. [2021-11-19 14:46:54,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:46:54,737 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1105 transitions. [2021-11-19 14:46:54,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 14:46:54,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:54,740 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:54,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:54,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:54,964 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:54,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:54,965 INFO L85 PathProgramCache]: Analyzing trace with hash 525764543, now seen corresponding path program 1 times [2021-11-19 14:46:54,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:54,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759111507] [2021-11-19 14:46:54,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:54,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:54,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:54,967 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:54,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:46:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:55,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:46:55,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:46:55,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:46:55,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:55,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759111507] [2021-11-19 14:46:55,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759111507] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:55,977 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:46:55,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:46:55,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31634418] [2021-11-19 14:46:55,978 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:55,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:46:55,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:55,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:46:55,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:46:55,980 INFO L87 Difference]: Start difference. First operand 690 states and 1105 transitions. Second operand has 11 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:46:56,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:56,293 INFO L93 Difference]: Finished difference Result 1294 states and 2073 transitions. [2021-11-19 14:46:56,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:46:56,295 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 112 [2021-11-19 14:46:56,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:56,301 INFO L225 Difference]: With dead ends: 1294 [2021-11-19 14:46:56,301 INFO L226 Difference]: Without dead ends: 704 [2021-11-19 14:46:56,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 214 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 14:46:56,306 INFO L933 BasicCegarLoop]: 1015 mSDtfsCounter, 181 mSDsluCounter, 6056 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 7071 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:56,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 7071 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:46:56,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-11-19 14:46:56,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 697. [2021-11-19 14:46:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 549 states have (on average 1.6138433515482695) internal successors, (886), 572 states have internal predecessors, (886), 112 states have call successors, (112), 32 states have call predecessors, (112), 35 states have return successors, (116), 106 states have call predecessors, (116), 109 states have call successors, (116) [2021-11-19 14:46:56,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1114 transitions. [2021-11-19 14:46:56,337 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1114 transitions. Word has length 112 [2021-11-19 14:46:56,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:56,337 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 1114 transitions. [2021-11-19 14:46:56,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:46:56,338 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1114 transitions. [2021-11-19 14:46:56,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 14:46:56,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:56,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:56,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:56,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:56,561 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:56,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:56,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1584246524, now seen corresponding path program 1 times [2021-11-19 14:46:56,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:56,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906046124] [2021-11-19 14:46:56,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:56,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:56,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:56,563 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:56,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:46:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:56,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:46:56,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:46:57,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:46:57,318 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:57,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906046124] [2021-11-19 14:46:57,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906046124] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:57,318 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:46:57,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:46:57,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151901517] [2021-11-19 14:46:57,318 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:57,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:46:57,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:57,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:46:57,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:46:57,319 INFO L87 Difference]: Start difference. First operand 697 states and 1114 transitions. Second operand has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:46:57,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:57,528 INFO L93 Difference]: Finished difference Result 1295 states and 2074 transitions. [2021-11-19 14:46:57,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:46:57,530 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 96 [2021-11-19 14:46:57,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:57,536 INFO L225 Difference]: With dead ends: 1295 [2021-11-19 14:46:57,536 INFO L226 Difference]: Without dead ends: 705 [2021-11-19 14:46:57,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:46:57,540 INFO L933 BasicCegarLoop]: 1017 mSDtfsCounter, 171 mSDsluCounter, 4936 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 5953 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:57,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 5953 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:46:57,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-11-19 14:46:57,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 700. [2021-11-19 14:46:57,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 551 states have (on average 1.6116152450090744) internal successors, (888), 575 states have internal predecessors, (888), 112 states have call successors, (112), 32 states have call predecessors, (112), 36 states have return successors, (117), 106 states have call predecessors, (117), 109 states have call successors, (117) [2021-11-19 14:46:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1117 transitions. [2021-11-19 14:46:57,569 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1117 transitions. Word has length 96 [2021-11-19 14:46:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:57,570 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 1117 transitions. [2021-11-19 14:46:57,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:46:57,570 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1117 transitions. [2021-11-19 14:46:57,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 14:46:57,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:57,574 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:57,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:57,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:57,791 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:57,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:57,791 INFO L85 PathProgramCache]: Analyzing trace with hash 306489849, now seen corresponding path program 1 times [2021-11-19 14:46:57,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:57,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319090230] [2021-11-19 14:46:57,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:57,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:57,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:57,792 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:57,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:46:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:58,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:46:58,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:46:58,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:46:58,615 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:58,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319090230] [2021-11-19 14:46:58,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319090230] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:58,616 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:46:58,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:46:58,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001303113] [2021-11-19 14:46:58,616 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:58,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:46:58,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:58,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:46:58,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:46:58,618 INFO L87 Difference]: Start difference. First operand 700 states and 1117 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:46:58,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:58,691 INFO L93 Difference]: Finished difference Result 1365 states and 2182 transitions. [2021-11-19 14:46:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:46:58,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 112 [2021-11-19 14:46:58,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:58,699 INFO L225 Difference]: With dead ends: 1365 [2021-11-19 14:46:58,699 INFO L226 Difference]: Without dead ends: 650 [2021-11-19 14:46:58,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 220 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 14:46:58,703 INFO L933 BasicCegarLoop]: 1011 mSDtfsCounter, 23 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 3026 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:58,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 3026 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:46:58,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-11-19 14:46:58,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 650. [2021-11-19 14:46:58,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 508 states have (on average 1.594488188976378) internal successors, (810), 527 states have internal predecessors, (810), 110 states have call successors, (110), 32 states have call predecessors, (110), 31 states have return successors, (107), 104 states have call predecessors, (107), 107 states have call successors, (107) [2021-11-19 14:46:58,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1027 transitions. [2021-11-19 14:46:58,731 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1027 transitions. Word has length 112 [2021-11-19 14:46:58,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:58,731 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1027 transitions. [2021-11-19 14:46:58,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:46:58,732 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1027 transitions. [2021-11-19 14:46:58,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 14:46:58,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:58,734 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:46:58,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:58,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:58,955 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:58,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:58,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1848361474, now seen corresponding path program 1 times [2021-11-19 14:46:58,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:58,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380889300] [2021-11-19 14:46:58,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:58,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:58,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:58,966 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:58,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:46:59,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:59,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:46:59,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:46:59,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:46:59,798 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:59,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380889300] [2021-11-19 14:46:59,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380889300] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:59,798 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:46:59,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:46:59,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169109947] [2021-11-19 14:46:59,799 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:59,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:46:59,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:59,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:46:59,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:46:59,800 INFO L87 Difference]: Start difference. First operand 650 states and 1027 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:46:59,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:59,984 INFO L93 Difference]: Finished difference Result 1326 states and 2087 transitions. [2021-11-19 14:46:59,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:46:59,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 114 [2021-11-19 14:46:59,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:59,991 INFO L225 Difference]: With dead ends: 1326 [2021-11-19 14:46:59,991 INFO L226 Difference]: Without dead ends: 647 [2021-11-19 14:46:59,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:46:59,995 INFO L933 BasicCegarLoop]: 956 mSDtfsCounter, 134 mSDsluCounter, 2829 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 3785 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:59,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 3785 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:46:59,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-11-19 14:47:00,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2021-11-19 14:47:00,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 505 states have (on average 1.5742574257425743) internal successors, (795), 523 states have internal predecessors, (795), 110 states have call successors, (110), 33 states have call predecessors, (110), 31 states have return successors, (107), 104 states have call predecessors, (107), 107 states have call successors, (107) [2021-11-19 14:47:00,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1012 transitions. [2021-11-19 14:47:00,023 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1012 transitions. Word has length 114 [2021-11-19 14:47:00,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:00,024 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1012 transitions. [2021-11-19 14:47:00,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:47:00,024 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1012 transitions. [2021-11-19 14:47:00,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 14:47:00,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:00,026 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:47:00,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:00,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:47:00,251 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:00,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:00,251 INFO L85 PathProgramCache]: Analyzing trace with hash 337097010, now seen corresponding path program 1 times [2021-11-19 14:47:00,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:00,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227784231] [2021-11-19 14:47:00,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:00,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:00,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:00,253 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:00,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:47:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:00,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:47:00,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:47:01,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:47:01,256 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:01,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227784231] [2021-11-19 14:47:01,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227784231] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:47:01,256 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:47:01,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-19 14:47:01,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519946172] [2021-11-19 14:47:01,257 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:01,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:47:01,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:01,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:47:01,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:47:01,258 INFO L87 Difference]: Start difference. First operand 647 states and 1012 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 4 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:47:02,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:02,393 INFO L93 Difference]: Finished difference Result 2377 states and 3831 transitions. [2021-11-19 14:47:02,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:47:02,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 4 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 99 [2021-11-19 14:47:02,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:02,409 INFO L225 Difference]: With dead ends: 2377 [2021-11-19 14:47:02,409 INFO L226 Difference]: Without dead ends: 1791 [2021-11-19 14:47:02,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 194 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 14:47:02,413 INFO L933 BasicCegarLoop]: 1281 mSDtfsCounter, 1807 mSDsluCounter, 2544 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1807 SdHoareTripleChecker+Valid, 3825 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:02,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1807 Valid, 3825 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:47:02,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2021-11-19 14:47:02,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1661. [2021-11-19 14:47:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1313 states have (on average 1.6077684691546077) internal successors, (2111), 1348 states have internal predecessors, (2111), 272 states have call successors, (272), 79 states have call predecessors, (272), 75 states have return successors, (283), 249 states have call predecessors, (283), 267 states have call successors, (283) [2021-11-19 14:47:02,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 2666 transitions. [2021-11-19 14:47:02,489 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 2666 transitions. Word has length 99 [2021-11-19 14:47:02,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:02,490 INFO L470 AbstractCegarLoop]: Abstraction has 1661 states and 2666 transitions. [2021-11-19 14:47:02,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 4 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:47:02,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 2666 transitions. [2021-11-19 14:47:02,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-19 14:47:02,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:02,497 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:47:02,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:02,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:47:02,718 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:02,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:02,718 INFO L85 PathProgramCache]: Analyzing trace with hash -339206739, now seen corresponding path program 1 times [2021-11-19 14:47:02,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:02,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654404309] [2021-11-19 14:47:02,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:02,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:02,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:02,720 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:02,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:47:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:03,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:47:03,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:47:03,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 14:47:03,767 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:03,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654404309] [2021-11-19 14:47:03,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654404309] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:47:03,767 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:47:03,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2021-11-19 14:47:03,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740512570] [2021-11-19 14:47:03,768 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:03,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:47:03,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:03,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:47:03,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:47:03,770 INFO L87 Difference]: Start difference. First operand 1661 states and 2666 transitions. Second operand has 8 states, 8 states have (on average 21.25) internal successors, (170), 8 states have internal predecessors, (170), 4 states have call successors, (37), 4 states have call predecessors, (37), 3 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-19 14:47:04,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:04,485 INFO L93 Difference]: Finished difference Result 3750 states and 6032 transitions. [2021-11-19 14:47:04,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:47:04,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.25) internal successors, (170), 8 states have internal predecessors, (170), 4 states have call successors, (37), 4 states have call predecessors, (37), 3 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) Word has length 153 [2021-11-19 14:47:04,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:04,508 INFO L225 Difference]: With dead ends: 3750 [2021-11-19 14:47:04,509 INFO L226 Difference]: Without dead ends: 2150 [2021-11-19 14:47:04,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 298 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 14:47:04,520 INFO L933 BasicCegarLoop]: 1182 mSDtfsCounter, 1448 mSDsluCounter, 4077 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1455 SdHoareTripleChecker+Valid, 5259 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:04,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1455 Valid, 5259 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:47:04,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-11-19 14:47:04,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 2013. [2021-11-19 14:47:04,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 1587 states have (on average 1.5608065532451165) internal successors, (2477), 1614 states have internal predecessors, (2477), 328 states have call successors, (328), 97 states have call predecessors, (328), 97 states have return successors, (371), 313 states have call predecessors, (371), 321 states have call successors, (371) [2021-11-19 14:47:04,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 3176 transitions. [2021-11-19 14:47:04,650 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 3176 transitions. Word has length 153 [2021-11-19 14:47:04,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:04,651 INFO L470 AbstractCegarLoop]: Abstraction has 2013 states and 3176 transitions. [2021-11-19 14:47:04,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.25) internal successors, (170), 8 states have internal predecessors, (170), 4 states have call successors, (37), 4 states have call predecessors, (37), 3 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-19 14:47:04,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 3176 transitions. [2021-11-19 14:47:04,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-19 14:47:04,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:04,661 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:47:04,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:04,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:47:04,880 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:04,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:04,881 INFO L85 PathProgramCache]: Analyzing trace with hash 161173665, now seen corresponding path program 1 times [2021-11-19 14:47:04,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:04,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797734728] [2021-11-19 14:47:04,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:04,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:04,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:04,882 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:04,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:47:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:05,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:47:05,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:47:05,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 14:47:06,052 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:06,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797734728] [2021-11-19 14:47:06,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797734728] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:47:06,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:47:06,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:47:06,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898987931] [2021-11-19 14:47:06,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:06,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:47:06,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:06,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:47:06,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:47:06,057 INFO L87 Difference]: Start difference. First operand 2013 states and 3176 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:47:07,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:07,116 INFO L93 Difference]: Finished difference Result 3985 states and 6447 transitions. [2021-11-19 14:47:07,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:47:07,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 154 [2021-11-19 14:47:07,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:07,138 INFO L225 Difference]: With dead ends: 3985 [2021-11-19 14:47:07,139 INFO L226 Difference]: Without dead ends: 2033 [2021-11-19 14:47:07,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:47:07,155 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 888 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:07,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 2415 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:47:07,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2021-11-19 14:47:07,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 2033. [2021-11-19 14:47:07,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 1602 states have (on average 1.5555555555555556) internal successors, (2492), 1629 states have internal predecessors, (2492), 328 states have call successors, (328), 102 states have call predecessors, (328), 102 states have return successors, (375), 313 states have call predecessors, (375), 321 states have call successors, (375) [2021-11-19 14:47:07,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 3195 transitions. [2021-11-19 14:47:07,306 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 3195 transitions. Word has length 154 [2021-11-19 14:47:07,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:07,306 INFO L470 AbstractCegarLoop]: Abstraction has 2033 states and 3195 transitions. [2021-11-19 14:47:07,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:47:07,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 3195 transitions. [2021-11-19 14:47:07,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 14:47:07,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:07,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:47:07,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:07,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:47:07,533 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:07,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:07,533 INFO L85 PathProgramCache]: Analyzing trace with hash 2114939187, now seen corresponding path program 1 times [2021-11-19 14:47:07,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:07,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314206221] [2021-11-19 14:47:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:07,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:07,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:07,537 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:07,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:47:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:07,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:47:07,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:47:08,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 14:47:08,793 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:08,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314206221] [2021-11-19 14:47:08,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314206221] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:47:08,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:47:08,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:47:08,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43588110] [2021-11-19 14:47:08,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:08,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:47:08,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:08,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:47:08,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:47:08,795 INFO L87 Difference]: Start difference. First operand 2033 states and 3195 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:47:09,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:09,749 INFO L93 Difference]: Finished difference Result 4030 states and 6486 transitions. [2021-11-19 14:47:09,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:47:09,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 156 [2021-11-19 14:47:09,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:09,768 INFO L225 Difference]: With dead ends: 4030 [2021-11-19 14:47:09,768 INFO L226 Difference]: Without dead ends: 2058 [2021-11-19 14:47:09,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:47:09,781 INFO L933 BasicCegarLoop]: 941 mSDtfsCounter, 901 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 2416 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:09,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 2416 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:47:09,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-11-19 14:47:09,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 2058. [2021-11-19 14:47:09,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 1622 states have (on average 1.5487053020961776) internal successors, (2512), 1649 states have internal predecessors, (2512), 328 states have call successors, (328), 107 states have call predecessors, (328), 107 states have return successors, (379), 313 states have call predecessors, (379), 321 states have call successors, (379) [2021-11-19 14:47:09,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 3219 transitions. [2021-11-19 14:47:09,922 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 3219 transitions. Word has length 156 [2021-11-19 14:47:09,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:09,923 INFO L470 AbstractCegarLoop]: Abstraction has 2058 states and 3219 transitions. [2021-11-19 14:47:09,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:47:09,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 3219 transitions. [2021-11-19 14:47:09,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-19 14:47:09,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:09,931 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:47:09,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:10,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:47:10,153 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:10,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:10,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1958562273, now seen corresponding path program 1 times [2021-11-19 14:47:10,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:10,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446537194] [2021-11-19 14:47:10,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:10,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:10,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:10,156 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:10,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:47:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:10,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:47:10,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:47:10,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 14:47:11,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:11,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446537194] [2021-11-19 14:47:11,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446537194] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:47:11,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:47:11,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:47:11,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689482040] [2021-11-19 14:47:11,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:11,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:47:11,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:11,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:47:11,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:47:11,399 INFO L87 Difference]: Start difference. First operand 2058 states and 3219 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:47:12,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:12,302 INFO L93 Difference]: Finished difference Result 4085 states and 6535 transitions. [2021-11-19 14:47:12,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:47:12,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 158 [2021-11-19 14:47:12,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:12,321 INFO L225 Difference]: With dead ends: 4085 [2021-11-19 14:47:12,322 INFO L226 Difference]: Without dead ends: 2088 [2021-11-19 14:47:12,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:47:12,332 INFO L933 BasicCegarLoop]: 941 mSDtfsCounter, 901 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 2416 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:12,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 2416 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:47:12,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2021-11-19 14:47:12,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 2088. [2021-11-19 14:47:12,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 1647 states have (on average 1.5403764420157864) internal successors, (2537), 1674 states have internal predecessors, (2537), 328 states have call successors, (328), 112 states have call predecessors, (328), 112 states have return successors, (383), 313 states have call predecessors, (383), 321 states have call successors, (383) [2021-11-19 14:47:12,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3248 transitions. [2021-11-19 14:47:12,440 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3248 transitions. Word has length 158 [2021-11-19 14:47:12,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:12,441 INFO L470 AbstractCegarLoop]: Abstraction has 2088 states and 3248 transitions. [2021-11-19 14:47:12,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:47:12,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3248 transitions. [2021-11-19 14:47:12,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-19 14:47:12,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:12,448 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:47:12,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:12,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:47:12,666 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:12,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:12,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1654286469, now seen corresponding path program 1 times [2021-11-19 14:47:12,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:12,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281695349] [2021-11-19 14:47:12,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:12,668 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:12,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:12,669 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:12,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:47:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:12,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:47:12,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:47:13,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 14:47:13,824 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:13,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281695349] [2021-11-19 14:47:13,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281695349] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:47:13,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:47:13,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:47:13,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619776802] [2021-11-19 14:47:13,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:13,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:47:13,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:13,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:47:13,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:47:13,827 INFO L87 Difference]: Start difference. First operand 2088 states and 3248 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:47:14,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:14,710 INFO L93 Difference]: Finished difference Result 4150 states and 6594 transitions. [2021-11-19 14:47:14,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:47:14,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 160 [2021-11-19 14:47:14,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:14,730 INFO L225 Difference]: With dead ends: 4150 [2021-11-19 14:47:14,730 INFO L226 Difference]: Without dead ends: 2123 [2021-11-19 14:47:14,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:47:14,739 INFO L933 BasicCegarLoop]: 941 mSDtfsCounter, 890 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 2416 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:14,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 2416 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:47:14,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2021-11-19 14:47:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2123. [2021-11-19 14:47:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 1677 states have (on average 1.5307096004770424) internal successors, (2567), 1704 states have internal predecessors, (2567), 328 states have call successors, (328), 117 states have call predecessors, (328), 117 states have return successors, (387), 313 states have call predecessors, (387), 321 states have call successors, (387) [2021-11-19 14:47:14,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 3282 transitions. [2021-11-19 14:47:14,866 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 3282 transitions. Word has length 160 [2021-11-19 14:47:14,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:14,867 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 3282 transitions. [2021-11-19 14:47:14,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:47:14,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 3282 transitions. [2021-11-19 14:47:14,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-19 14:47:14,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:14,875 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:47:14,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:15,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:47:15,093 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:15,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:15,093 INFO L85 PathProgramCache]: Analyzing trace with hash 488543521, now seen corresponding path program 1 times [2021-11-19 14:47:15,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:15,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192282501] [2021-11-19 14:47:15,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:15,094 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:15,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:15,095 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:15,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:47:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:15,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 14:47:15,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:47:15,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:47:16,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:16,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192282501] [2021-11-19 14:47:16,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192282501] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:16,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1624172553] [2021-11-19 14:47:16,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:16,708 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:16,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:47:16,709 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:47:16,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-19 14:47:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:17,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 14:47:17,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:47:17,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:47:18,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1624172553] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:18,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078987522] [2021-11-19 14:47:18,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:18,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:47:18,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:47:18,168 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:47:18,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-19 14:47:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:18,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 14:47:18,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:47:18,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:47:19,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078987522] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:19,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:47:19,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-19 14:47:19,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504126424] [2021-11-19 14:47:19,559 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:47:19,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 14:47:19,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:19,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 14:47:19,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:47:19,561 INFO L87 Difference]: Start difference. First operand 2123 states and 3282 transitions. Second operand has 18 states, 18 states have (on average 9.444444444444445) internal successors, (170), 14 states have internal predecessors, (170), 8 states have call successors, (36), 6 states have call predecessors, (36), 12 states have return successors, (36), 12 states have call predecessors, (36), 8 states have call successors, (36) [2021-11-19 14:47:30,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:30,051 INFO L93 Difference]: Finished difference Result 7028 states and 11199 transitions. [2021-11-19 14:47:30,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 14:47:30,053 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.444444444444445) internal successors, (170), 14 states have internal predecessors, (170), 8 states have call successors, (36), 6 states have call predecessors, (36), 12 states have return successors, (36), 12 states have call predecessors, (36), 8 states have call successors, (36) Word has length 162 [2021-11-19 14:47:30,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:30,089 INFO L225 Difference]: With dead ends: 7028 [2021-11-19 14:47:30,089 INFO L226 Difference]: Without dead ends: 4966 [2021-11-19 14:47:30,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 952 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-11-19 14:47:30,102 INFO L933 BasicCegarLoop]: 1935 mSDtfsCounter, 5675 mSDsluCounter, 4454 mSDsCounter, 0 mSdLazyCounter, 10161 mSolverCounterSat, 2117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5764 SdHoareTripleChecker+Valid, 6389 SdHoareTripleChecker+Invalid, 12278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2117 IncrementalHoareTripleChecker+Valid, 10161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:30,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5764 Valid, 6389 Invalid, 12278 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2117 Valid, 10161 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2021-11-19 14:47:30,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4966 states. [2021-11-19 14:47:30,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4966 to 4493. [2021-11-19 14:47:30,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4493 states, 3505 states have (on average 1.5258202567760342) internal successors, (5348), 3571 states have internal predecessors, (5348), 721 states have call successors, (721), 231 states have call predecessors, (721), 266 states have return successors, (948), 719 states have call predecessors, (948), 709 states have call successors, (948) [2021-11-19 14:47:30,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4493 states to 4493 states and 7017 transitions. [2021-11-19 14:47:30,432 INFO L78 Accepts]: Start accepts. Automaton has 4493 states and 7017 transitions. Word has length 162 [2021-11-19 14:47:30,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:30,433 INFO L470 AbstractCegarLoop]: Abstraction has 4493 states and 7017 transitions. [2021-11-19 14:47:30,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.444444444444445) internal successors, (170), 14 states have internal predecessors, (170), 8 states have call successors, (36), 6 states have call predecessors, (36), 12 states have return successors, (36), 12 states have call predecessors, (36), 8 states have call successors, (36) [2021-11-19 14:47:30,433 INFO L276 IsEmpty]: Start isEmpty. Operand 4493 states and 7017 transitions. [2021-11-19 14:47:30,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-19 14:47:30,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:30,446 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:47:30,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:30,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-19 14:47:30,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:31,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:31,061 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:31,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1235537609, now seen corresponding path program 1 times [2021-11-19 14:47:31,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:31,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785040486] [2021-11-19 14:47:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:31,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:31,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:31,063 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:31,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:47:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:31,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:47:31,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:31,632 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:47:31,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:47:32,022 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:32,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785040486] [2021-11-19 14:47:32,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785040486] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:47:32,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:47:32,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2021-11-19 14:47:32,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845098589] [2021-11-19 14:47:32,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:32,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:47:32,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:32,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:47:32,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:47:32,024 INFO L87 Difference]: Start difference. First operand 4493 states and 7017 transitions. Second operand has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-19 14:47:32,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:32,477 INFO L93 Difference]: Finished difference Result 8752 states and 13730 transitions. [2021-11-19 14:47:32,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:47:32,478 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) Word has length 163 [2021-11-19 14:47:32,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:32,521 INFO L225 Difference]: With dead ends: 8752 [2021-11-19 14:47:32,521 INFO L226 Difference]: Without dead ends: 4286 [2021-11-19 14:47:32,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:47:32,542 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 62 mSDsluCounter, 5634 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 6582 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:32,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 6582 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:47:32,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2021-11-19 14:47:32,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 4271. [2021-11-19 14:47:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4271 states, 3329 states have (on average 1.541904475818564) internal successors, (5133), 3394 states have internal predecessors, (5133), 694 states have call successors, (694), 213 states have call predecessors, (694), 247 states have return successors, (884), 692 states have call predecessors, (884), 682 states have call successors, (884) [2021-11-19 14:47:32,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4271 states to 4271 states and 6711 transitions. [2021-11-19 14:47:32,769 INFO L78 Accepts]: Start accepts. Automaton has 4271 states and 6711 transitions. Word has length 163 [2021-11-19 14:47:32,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:32,769 INFO L470 AbstractCegarLoop]: Abstraction has 4271 states and 6711 transitions. [2021-11-19 14:47:32,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-19 14:47:32,770 INFO L276 IsEmpty]: Start isEmpty. Operand 4271 states and 6711 transitions. [2021-11-19 14:47:32,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-19 14:47:32,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:32,778 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:47:32,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:32,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:47:32,996 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:32,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:32,997 INFO L85 PathProgramCache]: Analyzing trace with hash -69600288, now seen corresponding path program 1 times [2021-11-19 14:47:32,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:32,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535013039] [2021-11-19 14:47:32,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:32,998 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:32,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:32,998 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:32,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:47:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:33,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 14:47:33,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:47:33,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 14:47:34,509 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:34,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535013039] [2021-11-19 14:47:34,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535013039] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:34,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [219967111] [2021-11-19 14:47:34,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:34,509 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:34,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:47:34,510 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:47:34,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-19 14:47:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:34,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 14:47:34,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:47:35,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:35,823 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 14:47:35,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [219967111] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:35,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833065833] [2021-11-19 14:47:35,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:35,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:47:35,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:47:35,825 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:47:35,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-19 14:47:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:36,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 14:47:36,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:47:36,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:37,013 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 14:47:37,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833065833] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:37,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:47:37,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-19 14:47:37,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17181296] [2021-11-19 14:47:37,014 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:47:37,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:47:37,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:37,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:47:37,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:47:37,016 INFO L87 Difference]: Start difference. First operand 4271 states and 6711 transitions. Second operand has 14 states, 14 states have (on average 12.285714285714286) internal successors, (172), 12 states have internal predecessors, (172), 8 states have call successors, (37), 6 states have call predecessors, (37), 10 states have return successors, (36), 10 states have call predecessors, (36), 8 states have call successors, (36) [2021-11-19 14:47:43,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:43,739 INFO L93 Difference]: Finished difference Result 10819 states and 17308 transitions. [2021-11-19 14:47:43,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:47:43,740 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.285714285714286) internal successors, (172), 12 states have internal predecessors, (172), 8 states have call successors, (37), 6 states have call predecessors, (37), 10 states have return successors, (36), 10 states have call predecessors, (36), 8 states have call successors, (36) Word has length 170 [2021-11-19 14:47:43,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:43,781 INFO L225 Difference]: With dead ends: 10819 [2021-11-19 14:47:43,781 INFO L226 Difference]: Without dead ends: 6608 [2021-11-19 14:47:43,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1025 GetRequests, 1005 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:47:43,806 INFO L933 BasicCegarLoop]: 1795 mSDtfsCounter, 5109 mSDsluCounter, 2955 mSDsCounter, 0 mSdLazyCounter, 6763 mSolverCounterSat, 1497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5189 SdHoareTripleChecker+Valid, 4750 SdHoareTripleChecker+Invalid, 8260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1497 IncrementalHoareTripleChecker+Valid, 6763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:43,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5189 Valid, 4750 Invalid, 8260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1497 Valid, 6763 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-11-19 14:47:43,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6608 states. [2021-11-19 14:47:44,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6608 to 6399. [2021-11-19 14:47:44,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6399 states, 4965 states have (on average 1.5448136958710976) internal successors, (7670), 5060 states have internal predecessors, (7670), 1060 states have call successors, (1060), 309 states have call predecessors, (1060), 373 states have return successors, (1375), 1075 states have call predecessors, (1375), 1043 states have call successors, (1375) [2021-11-19 14:47:44,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6399 states to 6399 states and 10105 transitions. [2021-11-19 14:47:44,242 INFO L78 Accepts]: Start accepts. Automaton has 6399 states and 10105 transitions. Word has length 170 [2021-11-19 14:47:44,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:44,243 INFO L470 AbstractCegarLoop]: Abstraction has 6399 states and 10105 transitions. [2021-11-19 14:47:44,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.285714285714286) internal successors, (172), 12 states have internal predecessors, (172), 8 states have call successors, (37), 6 states have call predecessors, (37), 10 states have return successors, (36), 10 states have call predecessors, (36), 8 states have call successors, (36) [2021-11-19 14:47:44,243 INFO L276 IsEmpty]: Start isEmpty. Operand 6399 states and 10105 transitions. [2021-11-19 14:47:44,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-19 14:47:44,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:44,248 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:47:44,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:44,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:44,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:44,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:47:44,852 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:44,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:44,853 INFO L85 PathProgramCache]: Analyzing trace with hash 713971716, now seen corresponding path program 1 times [2021-11-19 14:47:44,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:44,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785568469] [2021-11-19 14:47:44,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:44,854 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:44,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:44,855 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:44,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 14:47:45,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:45,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:47:45,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 14:47:45,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:46,061 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 14:47:46,062 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:46,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785568469] [2021-11-19 14:47:46,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785568469] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:46,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [27687369] [2021-11-19 14:47:46,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:46,063 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:46,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:47:46,070 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:47:46,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-19 14:47:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:46,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:47:46,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 14:47:46,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 14:47:47,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [27687369] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:47,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066786588] [2021-11-19 14:47:47,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:47,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:47:47,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:47:47,125 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:47:47,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-19 14:47:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:47,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:47:47,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 14:47:47,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 14:47:48,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066786588] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:48,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:47:48,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-19 14:47:48,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518373616] [2021-11-19 14:47:48,034 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:47:48,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:47:48,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:48,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:47:48,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:47:48,036 INFO L87 Difference]: Start difference. First operand 6399 states and 10105 transitions. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 6 states have call successors, (32), 5 states have call predecessors, (32), 7 states have return successors, (30), 7 states have call predecessors, (30), 6 states have call successors, (30) [2021-11-19 14:47:55,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:55,401 INFO L93 Difference]: Finished difference Result 25105 states and 40781 transitions. [2021-11-19 14:47:55,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 14:47:55,403 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 6 states have call successors, (32), 5 states have call predecessors, (32), 7 states have return successors, (30), 7 states have call predecessors, (30), 6 states have call successors, (30) Word has length 171 [2021-11-19 14:47:55,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:55,525 INFO L225 Difference]: With dead ends: 25105 [2021-11-19 14:47:55,525 INFO L226 Difference]: Without dead ends: 18754 [2021-11-19 14:47:55,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1041 GetRequests, 1020 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-11-19 14:47:55,574 INFO L933 BasicCegarLoop]: 1686 mSDtfsCounter, 5573 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 4956 mSolverCounterSat, 1739 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5686 SdHoareTripleChecker+Valid, 3461 SdHoareTripleChecker+Invalid, 6695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1739 IncrementalHoareTripleChecker+Valid, 4956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:55,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5686 Valid, 3461 Invalid, 6695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1739 Valid, 4956 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2021-11-19 14:47:55,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18754 states. [2021-11-19 14:47:56,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18754 to 17168. [2021-11-19 14:47:56,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17168 states, 13282 states have (on average 1.5363650052702906) internal successors, (20406), 13557 states have internal predecessors, (20406), 2856 states have call successors, (2856), 879 states have call predecessors, (2856), 1029 states have return successors, (3942), 2869 states have call predecessors, (3942), 2818 states have call successors, (3942) [2021-11-19 14:47:56,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17168 states to 17168 states and 27204 transitions. [2021-11-19 14:47:56,867 INFO L78 Accepts]: Start accepts. Automaton has 17168 states and 27204 transitions. Word has length 171 [2021-11-19 14:47:56,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:56,868 INFO L470 AbstractCegarLoop]: Abstraction has 17168 states and 27204 transitions. [2021-11-19 14:47:56,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 6 states have call successors, (32), 5 states have call predecessors, (32), 7 states have return successors, (30), 7 states have call predecessors, (30), 6 states have call successors, (30) [2021-11-19 14:47:56,868 INFO L276 IsEmpty]: Start isEmpty. Operand 17168 states and 27204 transitions. [2021-11-19 14:47:56,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-19 14:47:56,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:56,873 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:47:56,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:57,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-19 14:47:57,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:57,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:57,493 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:57,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:57,493 INFO L85 PathProgramCache]: Analyzing trace with hash -2144131339, now seen corresponding path program 1 times [2021-11-19 14:47:57,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:57,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115009941] [2021-11-19 14:47:57,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:57,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:57,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:57,497 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:57,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 14:47:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:57,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:47:57,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:47:59,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:48:03,228 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 14:48:03,229 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:48:03,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115009941] [2021-11-19 14:48:03,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115009941] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:03,229 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:48:03,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-19 14:48:03,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417989912] [2021-11-19 14:48:03,230 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:03,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:48:03,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:48:03,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:48:03,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:48:03,232 INFO L87 Difference]: Start difference. First operand 17168 states and 27204 transitions. Second operand has 13 states, 13 states have (on average 15.692307692307692) internal successors, (204), 13 states have internal predecessors, (204), 11 states have call successors, (42), 8 states have call predecessors, (42), 8 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2021-11-19 14:48:17,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:48:17,268 INFO L93 Difference]: Finished difference Result 51482 states and 83846 transitions. [2021-11-19 14:48:17,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:48:17,269 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 15.692307692307692) internal successors, (204), 13 states have internal predecessors, (204), 11 states have call successors, (42), 8 states have call predecessors, (42), 8 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) Word has length 173 [2021-11-19 14:48:17,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:48:17,502 INFO L225 Difference]: With dead ends: 51482 [2021-11-19 14:48:17,503 INFO L226 Difference]: Without dead ends: 34350 [2021-11-19 14:48:17,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-11-19 14:48:17,615 INFO L933 BasicCegarLoop]: 1790 mSDtfsCounter, 8710 mSDsluCounter, 2873 mSDsCounter, 0 mSdLazyCounter, 9233 mSolverCounterSat, 2448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8925 SdHoareTripleChecker+Valid, 4663 SdHoareTripleChecker+Invalid, 11681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2448 IncrementalHoareTripleChecker+Valid, 9233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:48:17,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8925 Valid, 4663 Invalid, 11681 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2448 Valid, 9233 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2021-11-19 14:48:17,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34350 states. [2021-11-19 14:48:19,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34350 to 29838. [2021-11-19 14:48:19,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29838 states, 22766 states have (on average 1.522841078801722) internal successors, (34669), 23291 states have internal predecessors, (34669), 5324 states have call successors, (5324), 1504 states have call predecessors, (5324), 1747 states have return successors, (7343), 5300 states have call predecessors, (7343), 5268 states have call successors, (7343) [2021-11-19 14:48:19,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29838 states to 29838 states and 47336 transitions. [2021-11-19 14:48:19,928 INFO L78 Accepts]: Start accepts. Automaton has 29838 states and 47336 transitions. Word has length 173 [2021-11-19 14:48:19,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:48:19,929 INFO L470 AbstractCegarLoop]: Abstraction has 29838 states and 47336 transitions. [2021-11-19 14:48:19,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.692307692307692) internal successors, (204), 13 states have internal predecessors, (204), 11 states have call successors, (42), 8 states have call predecessors, (42), 8 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2021-11-19 14:48:19,929 INFO L276 IsEmpty]: Start isEmpty. Operand 29838 states and 47336 transitions. [2021-11-19 14:48:19,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-19 14:48:19,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:19,935 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:48:19,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-19 14:48:20,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:48:20,148 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:20,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:20,149 INFO L85 PathProgramCache]: Analyzing trace with hash 960269808, now seen corresponding path program 1 times [2021-11-19 14:48:20,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:48:20,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47653651] [2021-11-19 14:48:20,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:20,150 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:48:20,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:48:20,151 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:48:20,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-19 14:48:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:20,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:48:20,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:48:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 14:48:20,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:48:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 14:48:21,518 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:48:21,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47653651] [2021-11-19 14:48:21,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47653651] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:21,518 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:48:21,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-19 14:48:21,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739905148] [2021-11-19 14:48:21,519 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:21,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:48:21,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:48:21,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:48:21,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:48:21,520 INFO L87 Difference]: Start difference. First operand 29838 states and 47336 transitions. Second operand has 14 states, 14 states have (on average 12.714285714285714) internal successors, (178), 12 states have internal predecessors, (178), 8 states have call successors, (38), 6 states have call predecessors, (38), 8 states have return successors, (37), 10 states have call predecessors, (37), 8 states have call successors, (37) [2021-11-19 14:48:34,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:48:34,252 INFO L93 Difference]: Finished difference Result 97993 states and 168519 transitions. [2021-11-19 14:48:34,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 14:48:34,253 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.714285714285714) internal successors, (178), 12 states have internal predecessors, (178), 8 states have call successors, (38), 6 states have call predecessors, (38), 8 states have return successors, (37), 10 states have call predecessors, (37), 8 states have call successors, (37) Word has length 177 [2021-11-19 14:48:34,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:48:34,847 INFO L225 Difference]: With dead ends: 97993 [2021-11-19 14:48:34,848 INFO L226 Difference]: Without dead ends: 68107 [2021-11-19 14:48:35,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-11-19 14:48:35,139 INFO L933 BasicCegarLoop]: 1959 mSDtfsCounter, 4939 mSDsluCounter, 3208 mSDsCounter, 0 mSdLazyCounter, 9319 mSolverCounterSat, 1690 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5054 SdHoareTripleChecker+Valid, 5167 SdHoareTripleChecker+Invalid, 11009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1690 IncrementalHoareTripleChecker+Valid, 9319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:48:35,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5054 Valid, 5167 Invalid, 11009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1690 Valid, 9319 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2021-11-19 14:48:35,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68107 states. [2021-11-19 14:48:39,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68107 to 59464. [2021-11-19 14:48:39,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59464 states, 43796 states have (on average 1.5095442506164947) internal successors, (66112), 45293 states have internal predecessors, (66112), 12377 states have call successors, (12377), 2492 states have call predecessors, (12377), 3290 states have return successors, (18091), 12602 states have call predecessors, (18091), 12282 states have call successors, (18091) [2021-11-19 14:48:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59464 states to 59464 states and 96580 transitions. [2021-11-19 14:48:40,394 INFO L78 Accepts]: Start accepts. Automaton has 59464 states and 96580 transitions. Word has length 177 [2021-11-19 14:48:40,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:48:40,395 INFO L470 AbstractCegarLoop]: Abstraction has 59464 states and 96580 transitions. [2021-11-19 14:48:40,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.714285714285714) internal successors, (178), 12 states have internal predecessors, (178), 8 states have call successors, (38), 6 states have call predecessors, (38), 8 states have return successors, (37), 10 states have call predecessors, (37), 8 states have call successors, (37) [2021-11-19 14:48:40,396 INFO L276 IsEmpty]: Start isEmpty. Operand 59464 states and 96580 transitions. [2021-11-19 14:48:40,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-19 14:48:40,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:40,409 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:48:40,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-19 14:48:40,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:48:40,622 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:40,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:40,622 INFO L85 PathProgramCache]: Analyzing trace with hash -950772750, now seen corresponding path program 1 times [2021-11-19 14:48:40,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:48:40,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230597348] [2021-11-19 14:48:40,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:40,623 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:48:40,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:48:40,624 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:48:40,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-19 14:48:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:40,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 14:48:40,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:48:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 14:48:41,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:48:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:48:42,458 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:48:42,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230597348] [2021-11-19 14:48:42,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230597348] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:48:42,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:48:42,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 18 [2021-11-19 14:48:42,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403250983] [2021-11-19 14:48:42,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:42,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:48:42,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:48:42,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:48:42,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:48:42,460 INFO L87 Difference]: Start difference. First operand 59464 states and 96580 transitions. Second operand has 11 states, 11 states have (on average 9.909090909090908) internal successors, (109), 9 states have internal predecessors, (109), 6 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-19 14:48:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:48:50,865 INFO L93 Difference]: Finished difference Result 105932 states and 172501 transitions. [2021-11-19 14:48:50,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 14:48:50,866 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.909090909090908) internal successors, (109), 9 states have internal predecessors, (109), 6 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) Word has length 177 [2021-11-19 14:48:50,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:48:51,381 INFO L225 Difference]: With dead ends: 105932 [2021-11-19 14:48:51,381 INFO L226 Difference]: Without dead ends: 60293 [2021-11-19 14:48:52,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-11-19 14:48:52,010 INFO L933 BasicCegarLoop]: 1900 mSDtfsCounter, 3894 mSDsluCounter, 4814 mSDsCounter, 0 mSdLazyCounter, 2989 mSolverCounterSat, 876 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3902 SdHoareTripleChecker+Valid, 6714 SdHoareTripleChecker+Invalid, 3865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 876 IncrementalHoareTripleChecker+Valid, 2989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:48:52,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3902 Valid, 6714 Invalid, 3865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [876 Valid, 2989 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-19 14:48:52,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60293 states. [2021-11-19 14:48:55,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60293 to 59338. [2021-11-19 14:48:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59338 states, 43722 states have (on average 1.5097205068386625) internal successors, (66008), 45219 states have internal predecessors, (66008), 12347 states have call successors, (12347), 2470 states have call predecessors, (12347), 3268 states have return successors, (18061), 12572 states have call predecessors, (18061), 12252 states have call successors, (18061) [2021-11-19 14:48:56,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59338 states to 59338 states and 96416 transitions. [2021-11-19 14:48:56,534 INFO L78 Accepts]: Start accepts. Automaton has 59338 states and 96416 transitions. Word has length 177 [2021-11-19 14:48:56,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:48:56,538 INFO L470 AbstractCegarLoop]: Abstraction has 59338 states and 96416 transitions. [2021-11-19 14:48:56,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.909090909090908) internal successors, (109), 9 states have internal predecessors, (109), 6 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-19 14:48:56,538 INFO L276 IsEmpty]: Start isEmpty. Operand 59338 states and 96416 transitions. [2021-11-19 14:48:56,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-19 14:48:56,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:48:56,544 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:48:56,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-19 14:48:56,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:48:56,763 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:48:56,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:48:56,763 INFO L85 PathProgramCache]: Analyzing trace with hash -2019364969, now seen corresponding path program 1 times [2021-11-19 14:48:56,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:48:56,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89928153] [2021-11-19 14:48:56,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:48:56,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:48:56,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:48:56,765 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:48:56,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_456678ae-89ab-47fd-a537-fc604b1d39e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-19 14:48:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:48:57,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:48:57,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:48:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:48:57,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:48:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 14:48:57,877 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:48:57,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89928153] [2021-11-19 14:48:57,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89928153] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:48:57,877 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:48:57,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 14:48:57,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874141700] [2021-11-19 14:48:57,877 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:48:57,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:48:57,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:48:57,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:48:57,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:48:57,878 INFO L87 Difference]: Start difference. First operand 59338 states and 96416 transitions. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 8 states have call successors, (36), 6 states have call predecessors, (36), 6 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) [2021-11-19 14:49:15,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:49:15,849 INFO L93 Difference]: Finished difference Result 215919 states and 387581 transitions. [2021-11-19 14:49:15,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:49:15,849 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 8 states have call successors, (36), 6 states have call predecessors, (36), 6 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) Word has length 184 [2021-11-19 14:49:15,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted.