./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product01.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_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/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_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/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_2f1d384f-ffc9-42c8-b3c8-903116c5f373/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 2e63e44256bba8522bf99795cd1238c2e8ad8456659e8a545df838f8f88bd318 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:03:05,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:03:05,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:03:06,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:03:06,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:03:06,052 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:03:06,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:03:06,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:03:06,061 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:03:06,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:03:06,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:03:06,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:03:06,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:03:06,074 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:03:06,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:03:06,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:03:06,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:03:06,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:03:06,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:03:06,102 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:03:06,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:03:06,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:03:06,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:03:06,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:03:06,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:03:06,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:03:06,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:03:06,122 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:03:06,123 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:03:06,124 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:03:06,124 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:03:06,125 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:03:06,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:03:06,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:03:06,130 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:03:06,130 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:03:06,131 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:03:06,131 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:03:06,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:03:06,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:03:06,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:03:06,134 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 15:03:06,178 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:03:06,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:03:06,180 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:03:06,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:03:06,180 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:03:06,180 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:03:06,181 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:03:06,181 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:03:06,187 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:03:06,187 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:03:06,188 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:03:06,189 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:03:06,189 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:03:06,189 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:03:06,190 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:03:06,190 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:03:06,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:03:06,191 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:03:06,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:03:06,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:03:06,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:03:06,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:03:06,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:03:06,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:03:06,192 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:03:06,193 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:03:06,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:03:06,193 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:03:06,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:03:06,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:03:06,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:03:06,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:03:06,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:03:06,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:03:06,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:03:06,197 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:03:06,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:03:06,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:03:06,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:03:06,198 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:03:06,198 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_2f1d384f-ffc9-42c8-b3c8-903116c5f373/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e63e44256bba8522bf99795cd1238c2e8ad8456659e8a545df838f8f88bd318 [2021-11-19 15:03:06,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:03:06,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:03:06,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:03:06,511 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:03:06,512 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:03:06,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c [2021-11-19 15:03:06,601 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/data/74fab751c/05d42353cd8f4703b0d70017fc42c76c/FLAG10259229e [2021-11-19 15:03:07,187 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:03:07,188 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c [2021-11-19 15:03:07,209 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/data/74fab751c/05d42353cd8f4703b0d70017fc42c76c/FLAG10259229e [2021-11-19 15:03:07,398 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/data/74fab751c/05d42353cd8f4703b0d70017fc42c76c [2021-11-19 15:03:07,400 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:03:07,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:03:07,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:03:07,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:03:07,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:03:07,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:03:07" (1/1) ... [2021-11-19 15:03:07,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7631bba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:03:07, skipping insertion in model container [2021-11-19 15:03:07,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:03:07" (1/1) ... [2021-11-19 15:03:07,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:03:07,513 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:03:07,981 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_2f1d384f-ffc9-42c8-b3c8-903116c5f373/sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c[40412,40425] [2021-11-19 15:03:08,051 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:03:08,062 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 15:03:08,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7ab71a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:03:08, skipping insertion in model container [2021-11-19 15:03:08,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:03:08,067 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 15:03:08,069 INFO L158 Benchmark]: Toolchain (without parser) took 665.80ms. Allocated memory was 81.8MB in the beginning and 98.6MB in the end (delta: 16.8MB). Free memory was 43.1MB in the beginning and 60.2MB in the end (delta: -17.1MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. [2021-11-19 15:03:08,070 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 81.8MB. Free memory is still 62.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:03:08,072 INFO L158 Benchmark]: CACSL2BoogieTranslator took 661.28ms. Allocated memory was 81.8MB in the beginning and 98.6MB in the end (delta: 16.8MB). Free memory was 42.9MB in the beginning and 60.2MB in the end (delta: -17.2MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. [2021-11-19 15:03:08,074 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 81.8MB. Free memory is still 62.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 661.28ms. Allocated memory was 81.8MB in the beginning and 98.6MB in the end (delta: 16.8MB). Free memory was 42.9MB in the beginning and 60.2MB in the end (delta: -17.2MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1506]: 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_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/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_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/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_2f1d384f-ffc9-42c8-b3c8-903116c5f373/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 2e63e44256bba8522bf99795cd1238c2e8ad8456659e8a545df838f8f88bd318 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:03:10,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:03:10,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:03:10,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:03:10,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:03:10,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:03:10,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:03:10,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:03:10,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:03:10,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:03:10,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:03:10,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:03:10,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:03:10,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:03:10,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:03:10,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:03:10,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:03:10,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:03:10,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:03:10,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:03:10,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:03:10,368 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:03:10,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:03:10,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:03:10,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:03:10,376 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:03:10,376 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:03:10,377 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:03:10,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:03:10,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:03:10,379 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:03:10,380 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:03:10,382 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:03:10,383 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:03:10,384 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:03:10,384 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:03:10,385 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:03:10,385 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:03:10,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:03:10,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:03:10,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:03:10,388 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 15:03:10,414 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:03:10,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:03:10,415 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:03:10,415 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:03:10,415 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:03:10,415 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:03:10,416 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:03:10,416 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:03:10,416 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:03:10,416 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:03:10,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:03:10,417 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:03:10,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:03:10,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:03:10,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:03:10,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:03:10,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:03:10,418 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:03:10,418 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 15:03:10,419 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 15:03:10,419 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:03:10,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:03:10,419 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:03:10,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:03:10,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:03:10,420 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 15:03:10,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:03:10,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:03:10,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:03:10,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:03:10,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:03:10,421 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 15:03:10,421 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 15:03:10,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:03:10,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:03:10,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:03:10,422 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_2f1d384f-ffc9-42c8-b3c8-903116c5f373/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e63e44256bba8522bf99795cd1238c2e8ad8456659e8a545df838f8f88bd318 [2021-11-19 15:03:10,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:03:10,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:03:10,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:03:10,831 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:03:10,832 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:03:10,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c [2021-11-19 15:03:10,914 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/data/5dd2b29fe/7006a823d595408db43efd67e4e2ff5f/FLAG114d2dc55 [2021-11-19 15:03:11,710 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:03:11,710 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c [2021-11-19 15:03:11,751 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/data/5dd2b29fe/7006a823d595408db43efd67e4e2ff5f/FLAG114d2dc55 [2021-11-19 15:03:11,830 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/data/5dd2b29fe/7006a823d595408db43efd67e4e2ff5f [2021-11-19 15:03:11,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:03:11,834 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:03:11,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:03:11,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:03:11,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:03:11,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:03:11" (1/1) ... [2021-11-19 15:03:11,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16784644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:03:11, skipping insertion in model container [2021-11-19 15:03:11,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:03:11" (1/1) ... [2021-11-19 15:03:11,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:03:11,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:03:12,447 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_2f1d384f-ffc9-42c8-b3c8-903116c5f373/sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c[40412,40425] [2021-11-19 15:03:12,532 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:03:12,545 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 15:03:12,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:03:12,660 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_2f1d384f-ffc9-42c8-b3c8-903116c5f373/sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c[40412,40425] [2021-11-19 15:03:12,752 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:03:12,762 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:03:12,826 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_2f1d384f-ffc9-42c8-b3c8-903116c5f373/sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c[40412,40425] [2021-11-19 15:03:12,864 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:03:12,903 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:03:12,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:03:12 WrapperNode [2021-11-19 15:03:12,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:03:12,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:03:12,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:03:12,905 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:03:12,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:03:12" (1/1) ... [2021-11-19 15:03:12,959 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:03:12" (1/1) ... [2021-11-19 15:03:13,010 INFO L137 Inliner]: procedures = 88, calls = 334, calls flagged for inlining = 21, calls inlined = 18, statements flattened = 702 [2021-11-19 15:03:13,011 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:03:13,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:03:13,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:03:13,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:03:13,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:03:12" (1/1) ... [2021-11-19 15:03:13,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:03:12" (1/1) ... [2021-11-19 15:03:13,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:03:12" (1/1) ... [2021-11-19 15:03:13,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:03:12" (1/1) ... [2021-11-19 15:03:13,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:03:12" (1/1) ... [2021-11-19 15:03:13,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:03:12" (1/1) ... [2021-11-19 15:03:13,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:03:12" (1/1) ... [2021-11-19 15:03:13,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:03:13,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:03:13,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:03:13,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:03:13,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:03:12" (1/1) ... [2021-11-19 15:03:13,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:03:13,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:03:13,176 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:03:13,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:03:13,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:03:13,227 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-19 15:03:13,228 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-19 15:03:13,228 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 15:03:13,228 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 15:03:13,228 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 15:03:13,228 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 15:03:13,229 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 15:03:13,229 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 15:03:13,229 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 15:03:13,229 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 15:03:13,229 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 15:03:13,229 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 15:03:13,230 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 15:03:13,230 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 15:03:13,230 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 15:03:13,230 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 15:03:13,230 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 15:03:13,231 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 15:03:13,231 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 15:03:13,231 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 15:03:13,231 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 15:03:13,231 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 15:03:13,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 15:03:13,232 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-19 15:03:13,232 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-19 15:03:13,232 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 15:03:13,232 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 15:03:13,232 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-19 15:03:13,233 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-19 15:03:13,233 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 15:03:13,233 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 15:03:13,233 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 15:03:13,233 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 15:03:13,233 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 15:03:13,234 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 15:03:13,234 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 15:03:13,234 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 15:03:13,234 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 15:03:13,234 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 15:03:13,235 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 15:03:13,235 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 15:03:13,235 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 15:03:13,235 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 15:03:13,235 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 15:03:13,235 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 15:03:13,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:03:13,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:03:13,236 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 15:03:13,236 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 15:03:13,375 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:03:13,378 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:03:14,720 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:03:14,741 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:03:14,742 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 15:03:14,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:03:14 BoogieIcfgContainer [2021-11-19 15:03:14,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:03:14,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:03:14,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:03:14,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:03:14,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:03:11" (1/3) ... [2021-11-19 15:03:14,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d2cc477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:03:14, skipping insertion in model container [2021-11-19 15:03:14,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:03:12" (2/3) ... [2021-11-19 15:03:14,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d2cc477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:03:14, skipping insertion in model container [2021-11-19 15:03:14,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:03:14" (3/3) ... [2021-11-19 15:03:14,756 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product01.cil.c [2021-11-19 15:03:14,762 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:03:14,763 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:03:14,833 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:03:14,844 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 15:03:14,844 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 15:03:14,902 INFO L276 IsEmpty]: Start isEmpty. Operand has 546 states, 423 states have (on average 1.6926713947990544) internal successors, (716), 441 states have internal predecessors, (716), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-19 15:03:14,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 15:03:14,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:14,933 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:14,934 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:14,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:14,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1392442594, now seen corresponding path program 1 times [2021-11-19 15:03:14,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:14,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746457645] [2021-11-19 15:03:14,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:14,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:14,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:14,954 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:14,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:03:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:15,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:03:15,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:03:15,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:16,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:03:16,125 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:16,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1746457645] [2021-11-19 15:03:16,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1746457645] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:16,126 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:03:16,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 15:03:16,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932051811] [2021-11-19 15:03:16,130 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:16,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 15:03:16,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:16,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 15:03:16,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:03:16,178 INFO L87 Difference]: Start difference. First operand has 546 states, 423 states have (on average 1.6926713947990544) internal successors, (716), 441 states have internal predecessors, (716), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 15:03:16,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:16,575 INFO L93 Difference]: Finished difference Result 1095 states and 1845 transitions. [2021-11-19 15:03:16,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 15:03:16,579 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 85 [2021-11-19 15:03:16,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:16,612 INFO L225 Difference]: With dead ends: 1095 [2021-11-19 15:03:16,613 INFO L226 Difference]: Without dead ends: 557 [2021-11-19 15:03:16,629 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 15:03:16,636 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 118 mSDsluCounter, 6089 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 6983 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:16,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 6983 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:03:16,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-19 15:03:16,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 549. [2021-11-19 15:03:16,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 426 states have (on average 1.6830985915492958) internal successors, (717), 444 states have internal predecessors, (717), 99 states have call successors, (99), 23 states have call predecessors, (99), 23 states have return successors, (98), 94 states have call predecessors, (98), 96 states have call successors, (98) [2021-11-19 15:03:16,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 914 transitions. [2021-11-19 15:03:16,793 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 914 transitions. Word has length 85 [2021-11-19 15:03:16,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:16,799 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 914 transitions. [2021-11-19 15:03:16,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 15:03:16,800 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 914 transitions. [2021-11-19 15:03:16,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 15:03:16,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:16,812 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:16,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:17,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:03:17,029 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:17,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:17,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1014456678, now seen corresponding path program 1 times [2021-11-19 15:03:17,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:17,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747370729] [2021-11-19 15:03:17,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:17,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:17,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:17,033 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:17,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:03:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:17,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:03:17,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:03:17,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:03:17,957 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:17,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747370729] [2021-11-19 15:03:17,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747370729] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:17,958 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:03:17,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 15:03:17,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350062340] [2021-11-19 15:03:17,959 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:17,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 15:03:17,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:17,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 15:03:17,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:03:17,961 INFO L87 Difference]: Start difference. First operand 549 states and 914 transitions. Second operand has 11 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 15:03:18,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:18,234 INFO L93 Difference]: Finished difference Result 1103 states and 1846 transitions. [2021-11-19 15:03:18,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 15:03:18,235 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 86 [2021-11-19 15:03:18,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:18,268 INFO L225 Difference]: With dead ends: 1103 [2021-11-19 15:03:18,268 INFO L226 Difference]: Without dead ends: 570 [2021-11-19 15:03:18,272 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 15:03:18,274 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 105 mSDsluCounter, 6053 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 6947 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:18,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 6947 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:03:18,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-19 15:03:18,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2021-11-19 15:03:18,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 436 states have (on average 1.6788990825688073) internal successors, (732), 456 states have internal predecessors, (732), 100 states have call successors, (100), 23 states have call predecessors, (100), 25 states have return successors, (101), 95 states have call predecessors, (101), 97 states have call successors, (101) [2021-11-19 15:03:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 933 transitions. [2021-11-19 15:03:18,332 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 933 transitions. Word has length 86 [2021-11-19 15:03:18,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:18,332 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 933 transitions. [2021-11-19 15:03:18,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 15:03:18,333 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 933 transitions. [2021-11-19 15:03:18,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-19 15:03:18,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:18,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:18,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:18,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:03:18,556 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:18,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:18,557 INFO L85 PathProgramCache]: Analyzing trace with hash -610510714, now seen corresponding path program 1 times [2021-11-19 15:03:18,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:18,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683652450] [2021-11-19 15:03:18,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:18,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:18,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:18,559 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:18,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 15:03:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:18,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:03:18,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:03:19,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:03:19,534 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:19,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683652450] [2021-11-19 15:03:19,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683652450] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:19,534 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:03:19,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 15:03:19,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225049056] [2021-11-19 15:03:19,535 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:19,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 15:03:19,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:19,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 15:03:19,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:03:19,537 INFO L87 Difference]: Start difference. First operand 562 states and 933 transitions. Second operand has 11 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 15:03:19,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:19,752 INFO L93 Difference]: Finished difference Result 1129 states and 1885 transitions. [2021-11-19 15:03:19,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 15:03:19,754 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 87 [2021-11-19 15:03:19,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:19,759 INFO L225 Difference]: With dead ends: 1129 [2021-11-19 15:03:19,759 INFO L226 Difference]: Without dead ends: 583 [2021-11-19 15:03:19,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 163 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 15:03:19,765 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 184 mSDsluCounter, 5322 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 6216 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:19,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 6216 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:03:19,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-19 15:03:19,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 575. [2021-11-19 15:03:19,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 446 states have (on average 1.6748878923766817) internal successors, (747), 468 states have internal predecessors, (747), 101 states have call successors, (101), 23 states have call predecessors, (101), 27 states have return successors, (104), 96 states have call predecessors, (104), 98 states have call successors, (104) [2021-11-19 15:03:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 952 transitions. [2021-11-19 15:03:19,800 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 952 transitions. Word has length 87 [2021-11-19 15:03:19,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:19,800 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 952 transitions. [2021-11-19 15:03:19,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 15:03:19,801 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 952 transitions. [2021-11-19 15:03:19,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 15:03:19,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:19,805 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:19,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:20,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:03:20,021 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:20,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:20,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1878847093, now seen corresponding path program 1 times [2021-11-19 15:03:20,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:20,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940609159] [2021-11-19 15:03:20,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:20,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:20,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:20,026 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:20,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 15:03:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:20,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:03:20,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:03:20,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:03:20,898 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:20,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940609159] [2021-11-19 15:03:20,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940609159] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:20,898 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:03:20,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 15:03:20,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260713979] [2021-11-19 15:03:20,899 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:20,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:03:20,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:20,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:03:20,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:03:20,900 INFO L87 Difference]: Start difference. First operand 575 states and 952 transitions. Second operand has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 15:03:21,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:21,070 INFO L93 Difference]: Finished difference Result 1149 states and 1915 transitions. [2021-11-19 15:03:21,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:03:21,071 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2021-11-19 15:03:21,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:21,079 INFO L225 Difference]: With dead ends: 1149 [2021-11-19 15:03:21,079 INFO L226 Difference]: Without dead ends: 590 [2021-11-19 15:03:21,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 168 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 15:03:21,093 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 150 mSDsluCounter, 4283 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 5166 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:21,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 5166 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:03:21,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-11-19 15:03:21,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 588. [2021-11-19 15:03:21,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 456 states have (on average 1.6710526315789473) internal successors, (762), 480 states have internal predecessors, (762), 102 states have call successors, (102), 23 states have call predecessors, (102), 29 states have return successors, (110), 97 states have call predecessors, (110), 99 states have call successors, (110) [2021-11-19 15:03:21,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 974 transitions. [2021-11-19 15:03:21,134 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 974 transitions. Word has length 88 [2021-11-19 15:03:21,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:21,135 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 974 transitions. [2021-11-19 15:03:21,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 15:03:21,136 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 974 transitions. [2021-11-19 15:03:21,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-19 15:03:21,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:21,144 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:21,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:21,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:03:21,359 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:21,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:21,359 INFO L85 PathProgramCache]: Analyzing trace with hash 377758762, now seen corresponding path program 1 times [2021-11-19 15:03:21,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:21,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106402133] [2021-11-19 15:03:21,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:21,360 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:21,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:21,361 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:21,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 15:03:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:21,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:03:21,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:03:21,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:03:22,348 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:22,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106402133] [2021-11-19 15:03:22,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1106402133] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:22,348 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:03:22,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 15:03:22,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884420815] [2021-11-19 15:03:22,349 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:22,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:03:22,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:22,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:03:22,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:03:22,350 INFO L87 Difference]: Start difference. First operand 588 states and 974 transitions. Second operand has 13 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 15:03:22,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:22,682 INFO L93 Difference]: Finished difference Result 1172 states and 1951 transitions. [2021-11-19 15:03:22,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 15:03:22,684 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 89 [2021-11-19 15:03:22,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:22,689 INFO L225 Difference]: With dead ends: 1172 [2021-11-19 15:03:22,689 INFO L226 Difference]: Without dead ends: 594 [2021-11-19 15:03:22,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:03:22,694 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 178 mSDsluCounter, 7744 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 8617 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:22,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 8617 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:03:22,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-19 15:03:22,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 584. [2021-11-19 15:03:22,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 452 states have (on average 1.6615044247787611) internal successors, (751), 476 states have internal predecessors, (751), 102 states have call successors, (102), 23 states have call predecessors, (102), 29 states have return successors, (110), 97 states have call predecessors, (110), 99 states have call successors, (110) [2021-11-19 15:03:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 963 transitions. [2021-11-19 15:03:22,724 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 963 transitions. Word has length 89 [2021-11-19 15:03:22,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:22,724 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 963 transitions. [2021-11-19 15:03:22,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 15:03:22,725 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 963 transitions. [2021-11-19 15:03:22,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-19 15:03:22,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:22,728 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:22,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:22,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:03:22,946 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:22,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:22,946 INFO L85 PathProgramCache]: Analyzing trace with hash 346977178, now seen corresponding path program 1 times [2021-11-19 15:03:22,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:22,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012001817] [2021-11-19 15:03:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:22,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:22,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:22,948 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:22,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 15:03:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:23,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:03:23,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:03:23,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:03:23,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:23,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012001817] [2021-11-19 15:03:23,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012001817] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:23,648 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:03:23,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 15:03:23,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224504462] [2021-11-19 15:03:23,648 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:23,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:03:23,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:23,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:03:23,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:03:23,649 INFO L87 Difference]: Start difference. First operand 584 states and 963 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 15:03:23,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:23,705 INFO L93 Difference]: Finished difference Result 1144 states and 1892 transitions. [2021-11-19 15:03:23,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:03:23,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 89 [2021-11-19 15:03:23,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:23,710 INFO L225 Difference]: With dead ends: 1144 [2021-11-19 15:03:23,710 INFO L226 Difference]: Without dead ends: 507 [2021-11-19 15:03:23,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 173 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 15:03:23,716 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 26 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2642 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:23,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 2642 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:03:23,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-11-19 15:03:23,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2021-11-19 15:03:23,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 387 states have (on average 1.6459948320413436) internal successors, (637), 403 states have internal predecessors, (637), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2021-11-19 15:03:23,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 830 transitions. [2021-11-19 15:03:23,738 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 830 transitions. Word has length 89 [2021-11-19 15:03:23,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:23,739 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 830 transitions. [2021-11-19 15:03:23,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 15:03:23,739 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 830 transitions. [2021-11-19 15:03:23,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-19 15:03:23,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:23,742 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:23,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:23,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:03:23,958 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:23,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:23,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1176382102, now seen corresponding path program 1 times [2021-11-19 15:03:23,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:23,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093295643] [2021-11-19 15:03:23,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:23,959 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:23,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:23,960 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:23,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 15:03:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:24,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:03:24,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:03:24,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:03:24,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:24,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093295643] [2021-11-19 15:03:24,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093295643] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:24,898 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:03:24,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 15:03:24,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914841968] [2021-11-19 15:03:24,898 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:24,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:03:24,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:24,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:03:24,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:03:24,899 INFO L87 Difference]: Start difference. First operand 507 states and 830 transitions. Second operand has 13 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 15:03:25,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:25,073 INFO L93 Difference]: Finished difference Result 1001 states and 1648 transitions. [2021-11-19 15:03:25,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:03:25,074 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 90 [2021-11-19 15:03:25,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:25,078 INFO L225 Difference]: With dead ends: 1001 [2021-11-19 15:03:25,079 INFO L226 Difference]: Without dead ends: 507 [2021-11-19 15:03:25,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 15:03:25,083 INFO L933 BasicCegarLoop]: 813 mSDtfsCounter, 50 mSDsluCounter, 6462 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 7275 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:25,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 7275 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:03:25,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-11-19 15:03:25,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2021-11-19 15:03:25,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 387 states have (on average 1.6434108527131783) internal successors, (636), 403 states have internal predecessors, (636), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2021-11-19 15:03:25,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 829 transitions. [2021-11-19 15:03:25,108 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 829 transitions. Word has length 90 [2021-11-19 15:03:25,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:25,108 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 829 transitions. [2021-11-19 15:03:25,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 15:03:25,109 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 829 transitions. [2021-11-19 15:03:25,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 15:03:25,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:25,112 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:25,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:25,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:03:25,328 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:25,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:25,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1042184495, now seen corresponding path program 1 times [2021-11-19 15:03:25,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:25,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986368310] [2021-11-19 15:03:25,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:25,329 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:25,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:25,330 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:25,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 15:03:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:25,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:03:25,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:03:25,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:03:26,272 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:26,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986368310] [2021-11-19 15:03:26,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986368310] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:26,273 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:03:26,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 15:03:26,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160990471] [2021-11-19 15:03:26,273 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:26,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:03:26,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:26,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:03:26,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:03:26,274 INFO L87 Difference]: Start difference. First operand 507 states and 829 transitions. Second operand has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 15:03:26,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:26,474 INFO L93 Difference]: Finished difference Result 1001 states and 1646 transitions. [2021-11-19 15:03:26,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:03:26,475 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 91 [2021-11-19 15:03:26,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:26,482 INFO L225 Difference]: With dead ends: 1001 [2021-11-19 15:03:26,482 INFO L226 Difference]: Without dead ends: 507 [2021-11-19 15:03:26,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 15:03:26,488 INFO L933 BasicCegarLoop]: 813 mSDtfsCounter, 45 mSDsluCounter, 8082 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 8895 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:26,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 8895 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:03:26,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-11-19 15:03:26,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2021-11-19 15:03:26,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 387 states have (on average 1.6408268733850129) internal successors, (635), 403 states have internal predecessors, (635), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2021-11-19 15:03:26,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 828 transitions. [2021-11-19 15:03:26,509 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 828 transitions. Word has length 91 [2021-11-19 15:03:26,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:26,509 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 828 transitions. [2021-11-19 15:03:26,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 15:03:26,510 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 828 transitions. [2021-11-19 15:03:26,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-19 15:03:26,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:26,512 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:26,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:26,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:03:26,727 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:26,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:26,727 INFO L85 PathProgramCache]: Analyzing trace with hash -44401905, now seen corresponding path program 1 times [2021-11-19 15:03:26,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:26,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571778103] [2021-11-19 15:03:26,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:26,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:26,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:26,729 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:26,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 15:03:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:27,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:03:27,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:03:27,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:03:27,620 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:27,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571778103] [2021-11-19 15:03:27,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571778103] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:27,621 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:03:27,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 15:03:27,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603812063] [2021-11-19 15:03:27,621 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:27,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:03:27,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:27,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:03:27,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:03:27,624 INFO L87 Difference]: Start difference. First operand 507 states and 828 transitions. Second operand has 13 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 15:03:27,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:27,768 INFO L93 Difference]: Finished difference Result 1001 states and 1644 transitions. [2021-11-19 15:03:27,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:03:27,769 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 92 [2021-11-19 15:03:27,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:27,773 INFO L225 Difference]: With dead ends: 1001 [2021-11-19 15:03:27,773 INFO L226 Difference]: Without dead ends: 507 [2021-11-19 15:03:27,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 15:03:27,779 INFO L933 BasicCegarLoop]: 813 mSDtfsCounter, 64 mSDsluCounter, 4853 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 5666 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:27,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 5666 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:03:27,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-11-19 15:03:27,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2021-11-19 15:03:27,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 387 states have (on average 1.6382428940568476) internal successors, (634), 403 states have internal predecessors, (634), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2021-11-19 15:03:27,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 827 transitions. [2021-11-19 15:03:27,802 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 827 transitions. Word has length 92 [2021-11-19 15:03:27,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:27,803 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 827 transitions. [2021-11-19 15:03:27,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 15:03:27,803 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 827 transitions. [2021-11-19 15:03:27,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 15:03:27,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:27,807 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:27,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:28,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:03:28,023 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:28,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:28,024 INFO L85 PathProgramCache]: Analyzing trace with hash -511516108, now seen corresponding path program 1 times [2021-11-19 15:03:28,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:28,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816310410] [2021-11-19 15:03:28,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:28,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:28,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:28,026 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:28,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 15:03:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:28,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:03:28,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:03:28,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:03:28,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:28,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816310410] [2021-11-19 15:03:28,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816310410] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:03:28,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:03:28,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-19 15:03:28,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339398548] [2021-11-19 15:03:28,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:28,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:03:28,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:28,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:03:28,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:03:28,812 INFO L87 Difference]: Start difference. First operand 507 states and 827 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 15:03:29,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:29,606 INFO L93 Difference]: Finished difference Result 1488 states and 2465 transitions. [2021-11-19 15:03:29,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:03:29,607 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 93 [2021-11-19 15:03:29,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:29,616 INFO L225 Difference]: With dead ends: 1488 [2021-11-19 15:03:29,616 INFO L226 Difference]: Without dead ends: 999 [2021-11-19 15:03:29,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:03:29,621 INFO L933 BasicCegarLoop]: 941 mSDtfsCounter, 813 mSDsluCounter, 3485 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 4426 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:29,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 4426 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 15:03:29,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-11-19 15:03:29,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 990. [2021-11-19 15:03:29,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 759 states have (on average 1.6416337285902503) internal successors, (1246), 790 states have internal predecessors, (1246), 188 states have call successors, (188), 42 states have call predecessors, (188), 42 states have return successors, (199), 183 states have call predecessors, (199), 184 states have call successors, (199) [2021-11-19 15:03:29,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1633 transitions. [2021-11-19 15:03:29,699 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1633 transitions. Word has length 93 [2021-11-19 15:03:29,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:29,699 INFO L470 AbstractCegarLoop]: Abstraction has 990 states and 1633 transitions. [2021-11-19 15:03:29,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 15:03:29,700 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1633 transitions. [2021-11-19 15:03:29,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 15:03:29,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:29,703 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:29,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:29,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:03:29,923 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:29,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:29,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1915141428, now seen corresponding path program 1 times [2021-11-19 15:03:29,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:29,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570108415] [2021-11-19 15:03:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:29,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:29,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:29,925 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:29,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 15:03:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:30,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:03:30,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:03:30,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:03:30,597 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:30,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570108415] [2021-11-19 15:03:30,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570108415] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:30,598 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:03:30,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 15:03:30,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917963441] [2021-11-19 15:03:30,598 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:30,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:03:30,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:30,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:03:30,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:03:30,600 INFO L87 Difference]: Start difference. First operand 990 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 6 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-19 15:03:32,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:32,508 INFO L93 Difference]: Finished difference Result 3664 states and 6165 transitions. [2021-11-19 15:03:32,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 15:03:32,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 6 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 93 [2021-11-19 15:03:32,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:32,539 INFO L225 Difference]: With dead ends: 3664 [2021-11-19 15:03:32,539 INFO L226 Difference]: Without dead ends: 2692 [2021-11-19 15:03:32,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-19 15:03:32,554 INFO L933 BasicCegarLoop]: 1013 mSDtfsCounter, 2102 mSDsluCounter, 4756 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2164 SdHoareTripleChecker+Valid, 5769 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:32,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2164 Valid, 5769 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 15:03:32,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2021-11-19 15:03:32,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 2362. [2021-11-19 15:03:32,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 1804 states have (on average 1.6092017738359201) internal successors, (2903), 1882 states have internal predecessors, (2903), 452 states have call successors, (452), 102 states have call predecessors, (452), 105 states have return successors, (502), 439 states have call predecessors, (502), 445 states have call successors, (502) [2021-11-19 15:03:32,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 3857 transitions. [2021-11-19 15:03:32,720 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 3857 transitions. Word has length 93 [2021-11-19 15:03:32,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:32,721 INFO L470 AbstractCegarLoop]: Abstraction has 2362 states and 3857 transitions. [2021-11-19 15:03:32,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 6 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-19 15:03:32,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 3857 transitions. [2021-11-19 15:03:32,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 15:03:32,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:32,724 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:32,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:32,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:03:32,939 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:32,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:32,939 INFO L85 PathProgramCache]: Analyzing trace with hash -775152523, now seen corresponding path program 1 times [2021-11-19 15:03:32,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:32,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924927407] [2021-11-19 15:03:32,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:32,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:32,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:32,941 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:32,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 15:03:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:33,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:03:33,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:03:33,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:03:33,718 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:33,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924927407] [2021-11-19 15:03:33,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924927407] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:33,718 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:03:33,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 15:03:33,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474307893] [2021-11-19 15:03:33,719 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:33,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:03:33,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:33,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:03:33,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:03:33,720 INFO L87 Difference]: Start difference. First operand 2362 states and 3857 transitions. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 6 states have internal predecessors, (118), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 15:03:35,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:35,714 INFO L93 Difference]: Finished difference Result 8564 states and 14686 transitions. [2021-11-19 15:03:35,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:03:35,715 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 6 states have internal predecessors, (118), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 101 [2021-11-19 15:03:35,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:35,777 INFO L225 Difference]: With dead ends: 8564 [2021-11-19 15:03:35,777 INFO L226 Difference]: Without dead ends: 6220 [2021-11-19 15:03:35,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:03:35,797 INFO L933 BasicCegarLoop]: 1251 mSDtfsCounter, 1108 mSDsluCounter, 5130 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 6381 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:35,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1188 Valid, 6381 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 15:03:35,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6220 states. [2021-11-19 15:03:36,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6220 to 4648. [2021-11-19 15:03:36,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4648 states, 3555 states have (on average 1.6042194092827005) internal successors, (5703), 3714 states have internal predecessors, (5703), 874 states have call successors, (874), 201 states have call predecessors, (874), 218 states have return successors, (1138), 856 states have call predecessors, (1138), 862 states have call successors, (1138) [2021-11-19 15:03:36,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 7715 transitions. [2021-11-19 15:03:36,156 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 7715 transitions. Word has length 101 [2021-11-19 15:03:36,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:36,157 INFO L470 AbstractCegarLoop]: Abstraction has 4648 states and 7715 transitions. [2021-11-19 15:03:36,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 6 states have internal predecessors, (118), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 15:03:36,158 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 7715 transitions. [2021-11-19 15:03:36,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 15:03:36,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:36,161 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:36,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:36,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:03:36,379 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:36,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:36,379 INFO L85 PathProgramCache]: Analyzing trace with hash -330901337, now seen corresponding path program 1 times [2021-11-19 15:03:36,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:36,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461251466] [2021-11-19 15:03:36,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:36,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:36,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:36,381 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:36,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 15:03:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:36,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:03:36,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:03:36,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:03:37,058 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:37,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461251466] [2021-11-19 15:03:37,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461251466] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:37,059 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:03:37,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 15:03:37,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14462185] [2021-11-19 15:03:37,059 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:37,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:03:37,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:37,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:03:37,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:03:37,061 INFO L87 Difference]: Start difference. First operand 4648 states and 7715 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 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 15:03:37,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:37,428 INFO L93 Difference]: Finished difference Result 9308 states and 15652 transitions. [2021-11-19 15:03:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:03:37,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 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 102 [2021-11-19 15:03:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:37,474 INFO L225 Difference]: With dead ends: 9308 [2021-11-19 15:03:37,474 INFO L226 Difference]: Without dead ends: 4678 [2021-11-19 15:03:37,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 199 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 15:03:37,510 INFO L933 BasicCegarLoop]: 807 mSDtfsCounter, 19 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 2394 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:37,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 2394 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:03:37,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2021-11-19 15:03:37,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 4668. [2021-11-19 15:03:37,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4668 states, 3570 states have (on average 1.600280112044818) internal successors, (5713), 3729 states have internal predecessors, (5713), 874 states have call successors, (874), 211 states have call predecessors, (874), 223 states have return successors, (1111), 851 states have call predecessors, (1111), 862 states have call successors, (1111) [2021-11-19 15:03:37,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4668 states to 4668 states and 7698 transitions. [2021-11-19 15:03:37,903 INFO L78 Accepts]: Start accepts. Automaton has 4668 states and 7698 transitions. Word has length 102 [2021-11-19 15:03:37,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:37,903 INFO L470 AbstractCegarLoop]: Abstraction has 4668 states and 7698 transitions. [2021-11-19 15:03:37,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 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 15:03:37,905 INFO L276 IsEmpty]: Start isEmpty. Operand 4668 states and 7698 transitions. [2021-11-19 15:03:37,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-19 15:03:37,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:37,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:37,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:38,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:03:38,125 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:38,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:38,126 INFO L85 PathProgramCache]: Analyzing trace with hash -223809895, now seen corresponding path program 1 times [2021-11-19 15:03:38,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:38,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052983545] [2021-11-19 15:03:38,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:38,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:38,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:38,128 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:38,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 15:03:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:38,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:03:38,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:03:38,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:38,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:03:38,934 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:38,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052983545] [2021-11-19 15:03:38,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052983545] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:38,935 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:03:38,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 15:03:38,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013086275] [2021-11-19 15:03:38,936 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:38,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:03:38,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:38,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:03:38,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:03:38,938 INFO L87 Difference]: Start difference. First operand 4668 states and 7698 transitions. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 6 states have internal predecessors, (127), 3 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-19 15:03:40,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:40,992 INFO L93 Difference]: Finished difference Result 17140 states and 30165 transitions. [2021-11-19 15:03:40,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:03:40,993 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 6 states have internal predecessors, (127), 3 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) Word has length 110 [2021-11-19 15:03:40,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:41,175 INFO L225 Difference]: With dead ends: 17140 [2021-11-19 15:03:41,176 INFO L226 Difference]: Without dead ends: 12490 [2021-11-19 15:03:41,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:03:41,205 INFO L933 BasicCegarLoop]: 1251 mSDtfsCounter, 1072 mSDsluCounter, 5145 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 6396 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:41,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1141 Valid, 6396 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 15:03:41,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12490 states. [2021-11-19 15:03:41,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12490 to 9310. [2021-11-19 15:03:41,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9310 states, 7122 states have (on average 1.5954787980904241) internal successors, (11363), 7448 states have internal predecessors, (11363), 1723 states have call successors, (1723), 419 states have call predecessors, (1723), 464 states have return successors, (2600), 1690 states have call predecessors, (2600), 1701 states have call successors, (2600) [2021-11-19 15:03:42,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9310 states to 9310 states and 15686 transitions. [2021-11-19 15:03:42,052 INFO L78 Accepts]: Start accepts. Automaton has 9310 states and 15686 transitions. Word has length 110 [2021-11-19 15:03:42,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:42,053 INFO L470 AbstractCegarLoop]: Abstraction has 9310 states and 15686 transitions. [2021-11-19 15:03:42,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 6 states have internal predecessors, (127), 3 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-19 15:03:42,053 INFO L276 IsEmpty]: Start isEmpty. Operand 9310 states and 15686 transitions. [2021-11-19 15:03:42,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 15:03:42,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:42,058 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:42,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:42,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:03:42,270 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:42,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:42,270 INFO L85 PathProgramCache]: Analyzing trace with hash -602606661, now seen corresponding path program 1 times [2021-11-19 15:03:42,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:42,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847615315] [2021-11-19 15:03:42,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:42,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:42,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:42,272 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:42,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 15:03:42,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:42,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:03:42,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:42,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:03:42,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:42,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 15:03:42,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:42,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847615315] [2021-11-19 15:03:42,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847615315] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:42,978 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:03:42,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 15:03:42,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084830879] [2021-11-19 15:03:42,978 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:42,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:03:42,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:42,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:03:42,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:03:42,979 INFO L87 Difference]: Start difference. First operand 9310 states and 15686 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 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 15:03:43,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:43,429 INFO L93 Difference]: Finished difference Result 18722 states and 32059 transitions. [2021-11-19 15:03:43,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:03:43,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 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 111 [2021-11-19 15:03:43,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:43,489 INFO L225 Difference]: With dead ends: 18722 [2021-11-19 15:03:43,490 INFO L226 Difference]: Without dead ends: 9430 [2021-11-19 15:03:43,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 218 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 15:03:43,546 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 21 mSDsluCounter, 2380 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3185 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:43,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3185 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:03:43,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9430 states. [2021-11-19 15:03:44,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9430 to 9410. [2021-11-19 15:03:44,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9410 states, 7212 states have (on average 1.5894342762063227) internal successors, (11463), 7518 states have internal predecessors, (11463), 1723 states have call successors, (1723), 459 states have call predecessors, (1723), 474 states have return successors, (2558), 1680 states have call predecessors, (2558), 1701 states have call successors, (2558) [2021-11-19 15:03:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9410 states to 9410 states and 15744 transitions. [2021-11-19 15:03:44,190 INFO L78 Accepts]: Start accepts. Automaton has 9410 states and 15744 transitions. Word has length 111 [2021-11-19 15:03:44,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:44,192 INFO L470 AbstractCegarLoop]: Abstraction has 9410 states and 15744 transitions. [2021-11-19 15:03:44,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 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 15:03:44,197 INFO L276 IsEmpty]: Start isEmpty. Operand 9410 states and 15744 transitions. [2021-11-19 15:03:44,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 15:03:44,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:44,201 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:44,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:44,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:03:44,418 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:44,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:44,419 INFO L85 PathProgramCache]: Analyzing trace with hash 815865513, now seen corresponding path program 1 times [2021-11-19 15:03:44,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:44,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339979015] [2021-11-19 15:03:44,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:44,420 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:44,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:44,421 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:44,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 15:03:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:44,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:03:44,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:03:44,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 15:03:45,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:45,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339979015] [2021-11-19 15:03:45,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339979015] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:45,178 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:03:45,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 15:03:45,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609867214] [2021-11-19 15:03:45,179 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:45,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:03:45,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:45,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:03:45,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:03:45,180 INFO L87 Difference]: Start difference. First operand 9410 states and 15744 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 6 states have internal predecessors, (134), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-19 15:03:47,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:47,540 INFO L93 Difference]: Finished difference Result 34470 states and 62898 transitions. [2021-11-19 15:03:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:03:47,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 6 states have internal predecessors, (134), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) Word has length 120 [2021-11-19 15:03:47,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:47,707 INFO L225 Difference]: With dead ends: 34470 [2021-11-19 15:03:47,708 INFO L226 Difference]: Without dead ends: 25078 [2021-11-19 15:03:47,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:03:47,782 INFO L933 BasicCegarLoop]: 1270 mSDtfsCounter, 1054 mSDsluCounter, 4305 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1118 SdHoareTripleChecker+Valid, 5575 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:47,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1118 Valid, 5575 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 15:03:47,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25078 states. [2021-11-19 15:03:49,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25078 to 18874. [2021-11-19 15:03:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18874 states, 14461 states have (on average 1.584261116105387) internal successors, (22910), 15091 states have internal predecessors, (22910), 3426 states have call successors, (3426), 915 states have call predecessors, (3426), 986 states have return successors, (6151), 3363 states have call predecessors, (6151), 3384 states have call successors, (6151) [2021-11-19 15:03:49,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18874 states to 18874 states and 32487 transitions. [2021-11-19 15:03:49,423 INFO L78 Accepts]: Start accepts. Automaton has 18874 states and 32487 transitions. Word has length 120 [2021-11-19 15:03:49,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:49,423 INFO L470 AbstractCegarLoop]: Abstraction has 18874 states and 32487 transitions. [2021-11-19 15:03:49,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 6 states have internal predecessors, (134), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-19 15:03:49,424 INFO L276 IsEmpty]: Start isEmpty. Operand 18874 states and 32487 transitions. [2021-11-19 15:03:49,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 15:03:49,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:49,427 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:49,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:49,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:03:49,644 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:49,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:49,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1379102307, now seen corresponding path program 1 times [2021-11-19 15:03:49,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:49,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586596508] [2021-11-19 15:03:49,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:49,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:49,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:49,647 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:49,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 15:03:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:49,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:03:49,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 15:03:50,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:03:50,350 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:50,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586596508] [2021-11-19 15:03:50,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586596508] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:50,350 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:03:50,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 15:03:50,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762178151] [2021-11-19 15:03:50,351 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:50,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:03:50,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:50,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:03:50,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:03:50,352 INFO L87 Difference]: Start difference. First operand 18874 states and 32487 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 15:03:51,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:51,545 INFO L93 Difference]: Finished difference Result 37970 states and 66885 transitions. [2021-11-19 15:03:51,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:03:51,546 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 121 [2021-11-19 15:03:51,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:51,694 INFO L225 Difference]: With dead ends: 37970 [2021-11-19 15:03:51,695 INFO L226 Difference]: Without dead ends: 19114 [2021-11-19 15:03:51,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 238 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 15:03:51,830 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 34 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:51,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1599 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:03:51,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19114 states. [2021-11-19 15:03:52,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19114 to 19074. [2021-11-19 15:03:52,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19074 states, 14641 states have (on average 1.5784440953486785) internal successors, (23110), 15271 states have internal predecessors, (23110), 3426 states have call successors, (3426), 955 states have call predecessors, (3426), 1006 states have return successors, (6091), 3343 states have call predecessors, (6091), 3384 states have call successors, (6091) [2021-11-19 15:03:53,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19074 states to 19074 states and 32627 transitions. [2021-11-19 15:03:53,305 INFO L78 Accepts]: Start accepts. Automaton has 19074 states and 32627 transitions. Word has length 121 [2021-11-19 15:03:53,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:53,305 INFO L470 AbstractCegarLoop]: Abstraction has 19074 states and 32627 transitions. [2021-11-19 15:03:53,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 15:03:53,306 INFO L276 IsEmpty]: Start isEmpty. Operand 19074 states and 32627 transitions. [2021-11-19 15:03:53,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 15:03:53,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:53,310 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:53,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:53,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:03:53,536 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:53,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:53,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1933314565, now seen corresponding path program 1 times [2021-11-19 15:03:53,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:53,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044610554] [2021-11-19 15:03:53,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:53,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:53,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:53,539 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:53,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 15:03:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:53,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:03:53,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 15:03:54,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 15:03:54,506 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:54,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044610554] [2021-11-19 15:03:54,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044610554] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:54,507 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:03:54,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 15:03:54,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129755706] [2021-11-19 15:03:54,508 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:54,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:03:54,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:54,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:03:54,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:03:54,510 INFO L87 Difference]: Start difference. First operand 19074 states and 32627 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-19 15:03:58,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:58,685 INFO L93 Difference]: Finished difference Result 69522 states and 133772 transitions. [2021-11-19 15:03:58,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:03:58,687 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) Word has length 131 [2021-11-19 15:03:58,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:59,198 INFO L225 Difference]: With dead ends: 69522 [2021-11-19 15:03:59,198 INFO L226 Difference]: Without dead ends: 50466 [2021-11-19 15:03:59,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:03:59,367 INFO L933 BasicCegarLoop]: 1110 mSDtfsCounter, 1112 mSDsluCounter, 4535 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 5645 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:59,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1172 Valid, 5645 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 15:03:59,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50466 states. [2021-11-19 15:04:02,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50466 to 38342. [2021-11-19 15:04:02,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38342 states, 29414 states have (on average 1.5734344189841571) internal successors, (46281), 30712 states have internal predecessors, (46281), 6837 states have call successors, (6837), 1907 states have call predecessors, (6837), 2090 states have return successors, (15080), 6714 states have call predecessors, (15080), 6755 states have call successors, (15080) [2021-11-19 15:04:02,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38342 states to 38342 states and 68198 transitions. [2021-11-19 15:04:02,791 INFO L78 Accepts]: Start accepts. Automaton has 38342 states and 68198 transitions. Word has length 131 [2021-11-19 15:04:02,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:04:02,792 INFO L470 AbstractCegarLoop]: Abstraction has 38342 states and 68198 transitions. [2021-11-19 15:04:02,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-19 15:04:02,792 INFO L276 IsEmpty]: Start isEmpty. Operand 38342 states and 68198 transitions. [2021-11-19 15:04:02,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 15:04:02,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:04:02,795 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:04:02,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 15:04:03,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:04:03,014 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:04:03,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:04:03,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1148509977, now seen corresponding path program 1 times [2021-11-19 15:04:03,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:04:03,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259643827] [2021-11-19 15:04:03,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:04:03,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:04:03,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:04:03,017 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:04:03,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 15:04:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:04:03,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:04:03,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:04:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 15:04:03,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:04:04,248 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 15:04:04,248 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:04:04,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259643827] [2021-11-19 15:04:04,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259643827] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:04:04,249 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:04:04,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 15:04:04,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000762593] [2021-11-19 15:04:04,249 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:04:04,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:04:04,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:04:04,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:04:04,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:04:04,251 INFO L87 Difference]: Start difference. First operand 38342 states and 68198 transitions. Second operand has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 4 states have call successors, (32), 4 states have call predecessors, (32), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-19 15:04:09,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:04:09,841 INFO L93 Difference]: Finished difference Result 84660 states and 158793 transitions. [2021-11-19 15:04:09,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 15:04:09,843 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 4 states have call successors, (32), 4 states have call predecessors, (32), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 132 [2021-11-19 15:04:09,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:04:10,199 INFO L225 Difference]: With dead ends: 84660 [2021-11-19 15:04:10,199 INFO L226 Difference]: Without dead ends: 46336 [2021-11-19 15:04:10,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:04:10,598 INFO L933 BasicCegarLoop]: 1234 mSDtfsCounter, 1946 mSDsluCounter, 3530 mSDsCounter, 0 mSdLazyCounter, 2004 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2035 SdHoareTripleChecker+Valid, 4764 SdHoareTripleChecker+Invalid, 2188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:04:10,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2035 Valid, 4764 Invalid, 2188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 2004 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 15:04:10,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46336 states. [2021-11-19 15:04:12,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46336 to 44680. [2021-11-19 15:04:12,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44680 states, 33714 states have (on average 1.5751023313756896) internal successors, (53103), 35456 states have internal predecessors, (53103), 8569 states have call successors, (8569), 2179 states have call predecessors, (8569), 2396 states have return successors, (19328), 8396 states have call predecessors, (19328), 8487 states have call successors, (19328) [2021-11-19 15:04:13,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44680 states to 44680 states and 81000 transitions. [2021-11-19 15:04:13,838 INFO L78 Accepts]: Start accepts. Automaton has 44680 states and 81000 transitions. Word has length 132 [2021-11-19 15:04:13,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:04:13,838 INFO L470 AbstractCegarLoop]: Abstraction has 44680 states and 81000 transitions. [2021-11-19 15:04:13,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 4 states have call successors, (32), 4 states have call predecessors, (32), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-19 15:04:13,839 INFO L276 IsEmpty]: Start isEmpty. Operand 44680 states and 81000 transitions. [2021-11-19 15:04:13,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 15:04:13,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:04:13,843 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:04:13,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 15:04:14,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:04:14,059 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:04:14,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:04:14,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1864685983, now seen corresponding path program 1 times [2021-11-19 15:04:14,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:04:14,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698454757] [2021-11-19 15:04:14,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:04:14,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:04:14,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:04:14,061 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:04:14,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 15:04:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:04:14,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:04:14,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:04:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 15:04:14,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:04:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 15:04:14,772 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:04:14,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698454757] [2021-11-19 15:04:14,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698454757] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:04:14,773 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:04:14,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:04:14,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404261163] [2021-11-19 15:04:14,774 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:04:14,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:04:14,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:04:14,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:04:14,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:04:14,775 INFO L87 Difference]: Start difference. First operand 44680 states and 81000 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 15:04:18,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:04:18,841 INFO L93 Difference]: Finished difference Result 95034 states and 179075 transitions. [2021-11-19 15:04:18,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:04:18,842 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 136 [2021-11-19 15:04:18,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:04:19,200 INFO L225 Difference]: With dead ends: 95034 [2021-11-19 15:04:19,200 INFO L226 Difference]: Without dead ends: 56064 [2021-11-19 15:04:19,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:04:19,500 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 324 mSDsluCounter, 2494 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 3388 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:04:19,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 3388 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:04:19,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56064 states. [2021-11-19 15:04:21,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56064 to 42158. [2021-11-19 15:04:21,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42158 states, 32482 states have (on average 1.5744412289883627) internal successors, (51141), 33872 states have internal predecessors, (51141), 7269 states have call successors, (7269), 2179 states have call predecessors, (7269), 2406 states have return successors, (16938), 7066 states have call predecessors, (16938), 7187 states have call successors, (16938) [2021-11-19 15:04:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42158 states to 42158 states and 75348 transitions. [2021-11-19 15:04:22,591 INFO L78 Accepts]: Start accepts. Automaton has 42158 states and 75348 transitions. Word has length 136 [2021-11-19 15:04:22,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:04:22,592 INFO L470 AbstractCegarLoop]: Abstraction has 42158 states and 75348 transitions. [2021-11-19 15:04:22,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 15:04:22,593 INFO L276 IsEmpty]: Start isEmpty. Operand 42158 states and 75348 transitions. [2021-11-19 15:04:22,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-19 15:04:22,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:04:22,597 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 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 15:04:22,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 15:04:22,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:04:22,814 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:04:22,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:04:22,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1170885831, now seen corresponding path program 1 times [2021-11-19 15:04:22,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:04:22,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112249469] [2021-11-19 15:04:22,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:04:22,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:04:22,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:04:22,816 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:04:22,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f1d384f-ffc9-42c8-b3c8-903116c5f373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 15:04:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:04:23,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:04:23,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:04:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 15:04:23,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:04:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 15:04:23,752 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:04:23,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112249469] [2021-11-19 15:04:23,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112249469] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:04:23,752 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:04:23,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-19 15:04:23,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334294359] [2021-11-19 15:04:23,752 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:04:23,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 15:04:23,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:04:23,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 15:04:23,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:04:23,754 INFO L87 Difference]: Start difference. First operand 42158 states and 75348 transitions. Second operand has 10 states, 10 states have (on average 15.5) internal successors, (155), 8 states have internal predecessors, (155), 4 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (29), 6 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-19 15:04:33,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:04:33,105 INFO L93 Difference]: Finished difference Result 149836 states and 289969 transitions. [2021-11-19 15:04:33,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 15:04:33,106 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.5) internal successors, (155), 8 states have internal predecessors, (155), 4 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (29), 6 states have call predecessors, (29), 4 states have call successors, (29) Word has length 143 [2021-11-19 15:04:33,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted.