./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product29.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_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/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_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/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_0c619262-19d7-4324-bdbc-f4828a89d873/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 c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:52:10,902 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:52:10,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:52:10,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:52:10,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:52:10,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:52:10,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:52:10,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:52:10,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:52:10,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:52:10,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:52:10,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:52:10,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:52:11,002 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:52:11,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:52:11,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:52:11,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:52:11,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:52:11,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:52:11,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:52:11,032 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:52:11,033 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:52:11,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:52:11,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:52:11,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:52:11,046 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:52:11,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:52:11,049 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:52:11,050 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:52:11,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:52:11,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:52:11,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:52:11,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:52:11,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:52:11,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:52:11,059 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:52:11,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:52:11,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:52:11,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:52:11,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:52:11,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:52:11,068 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:52:11,135 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:52:11,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:52:11,137 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:52:11,138 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:52:11,138 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:52:11,138 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:52:11,139 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:52:11,139 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:52:11,139 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:52:11,140 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:52:11,149 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:52:11,149 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:52:11,149 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:52:11,150 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:52:11,150 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:52:11,150 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:52:11,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:52:11,152 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:52:11,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:52:11,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:52:11,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:52:11,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:52:11,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:52:11,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:52:11,154 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:52:11,154 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:52:11,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:52:11,155 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:52:11,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:52:11,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:52:11,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:52:11,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:52:11,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:52:11,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:52:11,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:52:11,158 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:52:11,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:52:11,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:52:11,158 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:52:11,159 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:52:11,159 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_0c619262-19d7-4324-bdbc-f4828a89d873/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 [2021-11-19 14:52:11,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:52:11,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:52:11,538 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:52:11,540 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:52:11,541 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:52:11,543 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2021-11-19 14:52:11,648 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/data/6cfd58ee4/503a29c5f855440681c47b08b613408d/FLAGfe22cf566 [2021-11-19 14:52:12,408 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:52:12,409 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2021-11-19 14:52:12,460 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/data/6cfd58ee4/503a29c5f855440681c47b08b613408d/FLAGfe22cf566 [2021-11-19 14:52:12,547 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/data/6cfd58ee4/503a29c5f855440681c47b08b613408d [2021-11-19 14:52:12,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:52:12,554 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:52:12,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:52:12,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:52:12,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:52:12,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:52:12" (1/1) ... [2021-11-19 14:52:12,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c485c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:52:12, skipping insertion in model container [2021-11-19 14:52:12,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:52:12" (1/1) ... [2021-11-19 14:52:12,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:52:12,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:52:12,956 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_0c619262-19d7-4324-bdbc-f4828a89d873/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2021-11-19 14:52:13,507 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:52:13,531 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:52:13,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3bd70d30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:52:13, skipping insertion in model container [2021-11-19 14:52:13,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:52:13,533 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:52:13,537 INFO L158 Benchmark]: Toolchain (without parser) took 980.41ms. Allocated memory was 94.4MB in the beginning and 125.8MB in the end (delta: 31.5MB). Free memory was 56.8MB in the beginning and 85.8MB in the end (delta: -28.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:52:13,539 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 94.4MB. Free memory was 64.3MB in the beginning and 64.3MB in the end (delta: 25.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:52:13,541 INFO L158 Benchmark]: CACSL2BoogieTranslator took 973.79ms. Allocated memory was 94.4MB in the beginning and 125.8MB in the end (delta: 31.5MB). Free memory was 56.5MB in the beginning and 86.4MB in the end (delta: -29.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:52:13,545 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 94.4MB. Free memory was 64.3MB in the beginning and 64.3MB in the end (delta: 25.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 973.79ms. Allocated memory was 94.4MB in the beginning and 125.8MB in the end (delta: 31.5MB). Free memory was 56.5MB in the beginning and 86.4MB in the end (delta: -29.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3079]: 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_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/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_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/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_0c619262-19d7-4324-bdbc-f4828a89d873/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 c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:52:16,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:52:16,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:52:16,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:52:16,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:52:16,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:52:16,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:52:16,173 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:52:16,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:52:16,177 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:52:16,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:52:16,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:52:16,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:52:16,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:52:16,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:52:16,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:52:16,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:52:16,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:52:16,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:52:16,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:52:16,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:52:16,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:52:16,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:52:16,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:52:16,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:52:16,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:52:16,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:52:16,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:52:16,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:52:16,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:52:16,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:52:16,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:52:16,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:52:16,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:52:16,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:52:16,216 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:52:16,217 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:52:16,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:52:16,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:52:16,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:52:16,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:52:16,225 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:52:16,282 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:52:16,283 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:52:16,285 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:52:16,285 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:52:16,285 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:52:16,286 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:52:16,286 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:52:16,286 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:52:16,286 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:52:16,287 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:52:16,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:52:16,290 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:52:16,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:52:16,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:52:16,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:52:16,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:52:16,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:52:16,291 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:52:16,291 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:52:16,292 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:52:16,292 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:52:16,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:52:16,292 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:52:16,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:52:16,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:52:16,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:52:16,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:52:16,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:52:16,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:52:16,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:52:16,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:52:16,295 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:52:16,295 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:52:16,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:52:16,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:52:16,296 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:52:16,296 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_0c619262-19d7-4324-bdbc-f4828a89d873/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 [2021-11-19 14:52:16,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:52:16,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:52:16,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:52:16,797 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:52:16,799 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:52:16,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2021-11-19 14:52:16,901 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/data/2cfd335dc/1e2399e2ea9244be9caceae5e9223a15/FLAGbfb2ff0db [2021-11-19 14:52:17,745 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:52:17,746 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2021-11-19 14:52:17,780 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/data/2cfd335dc/1e2399e2ea9244be9caceae5e9223a15/FLAGbfb2ff0db [2021-11-19 14:52:17,865 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/data/2cfd335dc/1e2399e2ea9244be9caceae5e9223a15 [2021-11-19 14:52:17,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:52:17,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:52:17,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:52:17,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:52:17,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:52:17,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:52:17" (1/1) ... [2021-11-19 14:52:17,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3454ed96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:52:17, skipping insertion in model container [2021-11-19 14:52:17,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:52:17" (1/1) ... [2021-11-19 14:52:17,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:52:18,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:52:18,268 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_0c619262-19d7-4324-bdbc-f4828a89d873/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2021-11-19 14:52:18,755 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:52:18,772 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:52:18,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:52:18,842 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_0c619262-19d7-4324-bdbc-f4828a89d873/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2021-11-19 14:52:19,051 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:52:19,060 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:52:19,092 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2021-11-19 14:52:19,219 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:52:19,262 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:52:19,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:52:19 WrapperNode [2021-11-19 14:52:19,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:52:19,265 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:52:19,265 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:52:19,265 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:52:19,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:52:19" (1/1) ... [2021-11-19 14:52:19,343 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:52:19" (1/1) ... [2021-11-19 14:52:19,416 INFO L137 Inliner]: procedures = 95, calls = 342, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 844 [2021-11-19 14:52:19,417 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:52:19,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:52:19,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:52:19,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:52:19,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:52:19" (1/1) ... [2021-11-19 14:52:19,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:52:19" (1/1) ... [2021-11-19 14:52:19,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:52:19" (1/1) ... [2021-11-19 14:52:19,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:52:19" (1/1) ... [2021-11-19 14:52:19,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:52:19" (1/1) ... [2021-11-19 14:52:19,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:52:19" (1/1) ... [2021-11-19 14:52:19,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:52:19" (1/1) ... [2021-11-19 14:52:19,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:52:19,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:52:19,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:52:19,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:52:19,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:52:19" (1/1) ... [2021-11-19 14:52:19,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:52:19,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:52:19,647 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:52:19,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:52:19,691 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-19 14:52:19,691 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-19 14:52:19,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:52:19,692 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 14:52:19,692 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 14:52:19,692 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 14:52:19,692 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 14:52:19,693 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:52:19,693 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:52:19,693 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:52:19,693 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:52:19,693 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:52:19,694 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:52:19,694 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 14:52:19,694 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 14:52:19,698 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:52:19,699 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:52:19,699 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:52:19,699 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:52:19,699 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 14:52:19,699 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 14:52:19,699 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 14:52:19,700 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 14:52:19,700 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:52:19,700 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:52:19,700 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:52:19,700 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:52:19,700 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:52:19,700 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:52:19,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:52:19,702 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 14:52:19,702 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 14:52:19,702 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:52:19,702 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:52:19,702 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:52:19,703 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:52:19,703 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:52:19,703 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:52:19,703 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:52:19,703 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:52:19,704 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:52:19,704 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:52:19,704 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 14:52:19,704 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 14:52:19,705 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:52:19,705 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:52:19,705 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:52:19,706 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:52:19,707 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:52:19,707 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:52:19,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:52:19,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:52:19,711 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:52:19,711 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:52:19,957 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:52:19,959 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:52:21,595 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:52:21,611 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:52:21,612 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:52:21,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:52:21 BoogieIcfgContainer [2021-11-19 14:52:21,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:52:21,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:52:21,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:52:21,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:52:21,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:52:17" (1/3) ... [2021-11-19 14:52:21,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e95c1bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:52:21, skipping insertion in model container [2021-11-19 14:52:21,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:52:19" (2/3) ... [2021-11-19 14:52:21,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e95c1bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:52:21, skipping insertion in model container [2021-11-19 14:52:21,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:52:21" (3/3) ... [2021-11-19 14:52:21,626 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product29.cil.c [2021-11-19 14:52:21,633 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:52:21,633 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:52:21,700 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:52:21,709 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:52:21,709 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:52:21,754 INFO L276 IsEmpty]: Start isEmpty. Operand has 579 states, 454 states have (on average 1.6916299559471366) internal successors, (768), 475 states have internal predecessors, (768), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-19 14:52:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 14:52:21,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:21,810 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:21,811 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:21,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:21,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1983373863, now seen corresponding path program 1 times [2021-11-19 14:52:21,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:21,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188206798] [2021-11-19 14:52:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:21,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:21,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:21,840 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:21,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:52:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:22,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:52:22,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:22,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:52:22,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:52:23,200 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:23,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188206798] [2021-11-19 14:52:23,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188206798] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:52:23,202 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:52:23,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:52:23,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252662314] [2021-11-19 14:52:23,205 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:23,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:52:23,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:23,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:52:23,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:52:23,261 INFO L87 Difference]: Start difference. First operand has 579 states, 454 states have (on average 1.6916299559471366) internal successors, (768), 475 states have internal predecessors, (768), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 14:52:23,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:23,369 INFO L93 Difference]: Finished difference Result 600 states and 994 transitions. [2021-11-19 14:52:23,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:52:23,372 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 111 [2021-11-19 14:52:23,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:23,418 INFO L225 Difference]: With dead ends: 600 [2021-11-19 14:52:23,419 INFO L226 Difference]: Without dead ends: 571 [2021-11-19 14:52:23,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:52:23,429 INFO L933 BasicCegarLoop]: 955 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:23,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:52:23,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-19 14:52:23,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-11-19 14:52:23,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 448 states have (on average 1.6897321428571428) internal successors, (757), 467 states have internal predecessors, (757), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 14:52:23,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 948 transitions. [2021-11-19 14:52:23,616 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 948 transitions. Word has length 111 [2021-11-19 14:52:23,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:23,618 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 948 transitions. [2021-11-19 14:52:23,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 14:52:23,618 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 948 transitions. [2021-11-19 14:52:23,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 14:52:23,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:23,636 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:23,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:23,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:23,839 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:23,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:23,840 INFO L85 PathProgramCache]: Analyzing trace with hash -2050586346, now seen corresponding path program 1 times [2021-11-19 14:52:23,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:23,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053384136] [2021-11-19 14:52:23,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:23,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:23,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:23,843 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:23,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:52:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:24,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:52:24,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:52:24,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:52:25,028 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:25,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053384136] [2021-11-19 14:52:25,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053384136] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:52:25,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:52:25,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:52:25,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349862347] [2021-11-19 14:52:25,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:25,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:52:25,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:25,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:52:25,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:52:25,042 INFO L87 Difference]: Start difference. First operand 571 states and 948 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:52:25,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:25,254 INFO L93 Difference]: Finished difference Result 1133 states and 1888 transitions. [2021-11-19 14:52:25,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:52:25,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 113 [2021-11-19 14:52:25,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:25,268 INFO L225 Difference]: With dead ends: 1133 [2021-11-19 14:52:25,269 INFO L226 Difference]: Without dead ends: 571 [2021-11-19 14:52:25,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:52:25,283 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 14 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2795 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:25,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2795 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:52:25,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-19 14:52:25,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-11-19 14:52:25,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 448 states have (on average 1.6875) internal successors, (756), 467 states have internal predecessors, (756), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 14:52:25,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 947 transitions. [2021-11-19 14:52:25,382 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 947 transitions. Word has length 113 [2021-11-19 14:52:25,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:25,385 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 947 transitions. [2021-11-19 14:52:25,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:52:25,386 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 947 transitions. [2021-11-19 14:52:25,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 14:52:25,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:25,406 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:25,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:25,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:25,624 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:25,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:25,626 INFO L85 PathProgramCache]: Analyzing trace with hash 229491886, now seen corresponding path program 1 times [2021-11-19 14:52:25,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:25,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189787398] [2021-11-19 14:52:25,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:25,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:25,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:25,629 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:25,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:52:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:26,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:52:26,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:26,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:52:26,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:52:26,808 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:26,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189787398] [2021-11-19 14:52:26,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189787398] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:52:26,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:52:26,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:52:26,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311928047] [2021-11-19 14:52:26,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:26,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:52:26,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:26,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:52:26,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:52:26,819 INFO L87 Difference]: Start difference. First operand 571 states and 947 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:52:26,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:26,948 INFO L93 Difference]: Finished difference Result 1133 states and 1886 transitions. [2021-11-19 14:52:26,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:52:26,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 115 [2021-11-19 14:52:26,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:26,958 INFO L225 Difference]: With dead ends: 1133 [2021-11-19 14:52:26,958 INFO L226 Difference]: Without dead ends: 571 [2021-11-19 14:52:26,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:52:26,968 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 12 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2795 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:26,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2795 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:52:26,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-19 14:52:27,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-11-19 14:52:27,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 448 states have (on average 1.6852678571428572) internal successors, (755), 467 states have internal predecessors, (755), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 14:52:27,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 946 transitions. [2021-11-19 14:52:27,032 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 946 transitions. Word has length 115 [2021-11-19 14:52:27,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:27,033 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 946 transitions. [2021-11-19 14:52:27,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:52:27,034 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 946 transitions. [2021-11-19 14:52:27,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 14:52:27,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:27,042 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:27,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-19 14:52:27,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:27,255 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:27,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:27,256 INFO L85 PathProgramCache]: Analyzing trace with hash 808115478, now seen corresponding path program 1 times [2021-11-19 14:52:27,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:27,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255340936] [2021-11-19 14:52:27,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:27,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:27,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:27,263 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:27,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:52:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:27,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:52:27,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:52:28,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:52:28,505 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:28,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255340936] [2021-11-19 14:52:28,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255340936] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:52:28,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:52:28,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:52:28,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236340019] [2021-11-19 14:52:28,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:28,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:52:28,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:28,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:52:28,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:52:28,507 INFO L87 Difference]: Start difference. First operand 571 states and 946 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:52:28,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:28,637 INFO L93 Difference]: Finished difference Result 1137 states and 1889 transitions. [2021-11-19 14:52:28,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:52:28,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2021-11-19 14:52:28,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:28,645 INFO L225 Difference]: With dead ends: 1137 [2021-11-19 14:52:28,645 INFO L226 Difference]: Without dead ends: 577 [2021-11-19 14:52:28,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:52:28,650 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 13 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2795 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:28,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2795 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:52:28,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-19 14:52:28,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-19 14:52:28,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 453 states have (on average 1.6777041942604856) internal successors, (760), 472 states have internal predecessors, (760), 98 states have call successors, (98), 26 states have call predecessors, (98), 25 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 14:52:28,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 951 transitions. [2021-11-19 14:52:28,690 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 951 transitions. Word has length 117 [2021-11-19 14:52:28,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:28,690 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 951 transitions. [2021-11-19 14:52:28,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:52:28,691 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 951 transitions. [2021-11-19 14:52:28,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 14:52:28,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:28,697 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:28,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:28,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:28,911 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:28,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:28,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1483857368, now seen corresponding path program 1 times [2021-11-19 14:52:28,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:28,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594491426] [2021-11-19 14:52:28,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:28,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:28,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:28,914 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:28,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:52:29,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:29,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:52:29,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:52:29,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:30,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:52:30,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:30,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594491426] [2021-11-19 14:52:30,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594491426] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:52:30,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:52:30,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:52:30,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880291639] [2021-11-19 14:52:30,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:30,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:52:30,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:30,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:52:30,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:52:30,088 INFO L87 Difference]: Start difference. First operand 577 states and 951 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:52:30,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:30,190 INFO L93 Difference]: Finished difference Result 1136 states and 1880 transitions. [2021-11-19 14:52:30,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:52:30,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 118 [2021-11-19 14:52:30,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:30,200 INFO L225 Difference]: With dead ends: 1136 [2021-11-19 14:52:30,200 INFO L226 Difference]: Without dead ends: 577 [2021-11-19 14:52:30,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:52:30,206 INFO L933 BasicCegarLoop]: 935 mSDtfsCounter, 8 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2796 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:30,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2796 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:52:30,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-19 14:52:30,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-19 14:52:30,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 453 states have (on average 1.6754966887417218) internal successors, (759), 472 states have internal predecessors, (759), 98 states have call successors, (98), 26 states have call predecessors, (98), 25 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 14:52:30,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 950 transitions. [2021-11-19 14:52:30,245 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 950 transitions. Word has length 118 [2021-11-19 14:52:30,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:30,245 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 950 transitions. [2021-11-19 14:52:30,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:52:30,245 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 950 transitions. [2021-11-19 14:52:30,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 14:52:30,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:30,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:30,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-19 14:52:30,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:30,467 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:30,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:30,467 INFO L85 PathProgramCache]: Analyzing trace with hash 707607642, now seen corresponding path program 1 times [2021-11-19 14:52:30,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:30,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130532739] [2021-11-19 14:52:30,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:30,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:30,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:30,471 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:30,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:52:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:30,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 950 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:52:30,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:52:31,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:52:31,616 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:31,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130532739] [2021-11-19 14:52:31,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130532739] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:52:31,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:52:31,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:52:31,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618339642] [2021-11-19 14:52:31,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:31,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:52:31,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:31,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:52:31,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:52:31,621 INFO L87 Difference]: Start difference. First operand 577 states and 950 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:52:31,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:31,715 INFO L93 Difference]: Finished difference Result 1136 states and 1879 transitions. [2021-11-19 14:52:31,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:52:31,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 119 [2021-11-19 14:52:31,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:31,726 INFO L225 Difference]: With dead ends: 1136 [2021-11-19 14:52:31,727 INFO L226 Difference]: Without dead ends: 577 [2021-11-19 14:52:31,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:52:31,734 INFO L933 BasicCegarLoop]: 935 mSDtfsCounter, 6 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2796 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:31,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2796 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:52:31,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-19 14:52:31,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-19 14:52:31,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 453 states have (on average 1.6732891832229582) internal successors, (758), 472 states have internal predecessors, (758), 98 states have call successors, (98), 26 states have call predecessors, (98), 25 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 14:52:31,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 949 transitions. [2021-11-19 14:52:31,771 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 949 transitions. Word has length 119 [2021-11-19 14:52:31,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:31,772 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 949 transitions. [2021-11-19 14:52:31,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:52:31,772 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 949 transitions. [2021-11-19 14:52:31,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:52:31,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:31,779 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:31,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:32,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:32,004 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:32,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:32,005 INFO L85 PathProgramCache]: Analyzing trace with hash 151725420, now seen corresponding path program 1 times [2021-11-19 14:52:32,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:32,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702228230] [2021-11-19 14:52:32,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:32,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:32,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:32,008 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:32,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:52:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:32,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:52:32,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:52:32,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:52:33,331 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:33,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702228230] [2021-11-19 14:52:33,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702228230] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:52:33,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:52:33,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:52:33,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755335837] [2021-11-19 14:52:33,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:33,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:52:33,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:33,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:52:33,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:52:33,334 INFO L87 Difference]: Start difference. First operand 577 states and 949 transitions. Second operand has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:52:33,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:33,608 INFO L93 Difference]: Finished difference Result 1153 states and 1907 transitions. [2021-11-19 14:52:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:52:33,610 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 120 [2021-11-19 14:52:33,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:33,621 INFO L225 Difference]: With dead ends: 1153 [2021-11-19 14:52:33,621 INFO L226 Difference]: Without dead ends: 598 [2021-11-19 14:52:33,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:52:33,627 INFO L933 BasicCegarLoop]: 933 mSDtfsCounter, 148 mSDsluCounter, 4558 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5491 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:33,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5491 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:52:33,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-19 14:52:33,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 596. [2021-11-19 14:52:33,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 469 states have (on average 1.671641791044776) internal successors, (784), 490 states have internal predecessors, (784), 99 states have call successors, (99), 26 states have call predecessors, (99), 27 states have return successors, (97), 92 states have call predecessors, (97), 94 states have call successors, (97) [2021-11-19 14:52:33,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 980 transitions. [2021-11-19 14:52:33,665 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 980 transitions. Word has length 120 [2021-11-19 14:52:33,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:33,666 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 980 transitions. [2021-11-19 14:52:33,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:52:33,666 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 980 transitions. [2021-11-19 14:52:33,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:52:33,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:33,673 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:33,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:33,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:33,887 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:33,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:33,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1282512045, now seen corresponding path program 1 times [2021-11-19 14:52:33,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:33,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372687449] [2021-11-19 14:52:33,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:33,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:33,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:33,891 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:33,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:52:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:34,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:52:34,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:52:34,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:52:35,132 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:35,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372687449] [2021-11-19 14:52:35,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372687449] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:52:35,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:52:35,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-19 14:52:35,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110325086] [2021-11-19 14:52:35,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:35,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:52:35,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:35,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:52:35,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:52:35,135 INFO L87 Difference]: Start difference. First operand 596 states and 980 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:52:35,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:35,229 INFO L93 Difference]: Finished difference Result 1166 states and 1929 transitions. [2021-11-19 14:52:35,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:52:35,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2021-11-19 14:52:35,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:35,237 INFO L225 Difference]: With dead ends: 1166 [2021-11-19 14:52:35,237 INFO L226 Difference]: Without dead ends: 592 [2021-11-19 14:52:35,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:52:35,243 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 8 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2795 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:35,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2795 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:52:35,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-19 14:52:35,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-19 14:52:35,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 467 states have (on average 1.6723768736616702) internal successors, (781), 487 states have internal predecessors, (781), 98 states have call successors, (98), 26 states have call predecessors, (98), 26 states have return successors, (94), 91 states have call predecessors, (94), 93 states have call successors, (94) [2021-11-19 14:52:35,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 973 transitions. [2021-11-19 14:52:35,277 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 973 transitions. Word has length 120 [2021-11-19 14:52:35,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:35,278 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 973 transitions. [2021-11-19 14:52:35,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:52:35,278 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 973 transitions. [2021-11-19 14:52:35,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 14:52:35,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:35,284 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:35,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:35,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:35,511 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:35,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:35,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1361495761, now seen corresponding path program 1 times [2021-11-19 14:52:35,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:35,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [539104764] [2021-11-19 14:52:35,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:35,513 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:35,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:35,515 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:35,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:52:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:36,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 952 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:52:36,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:52:36,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:36,711 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:52:36,712 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:36,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [539104764] [2021-11-19 14:52:36,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [539104764] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:52:36,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:52:36,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:52:36,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593756059] [2021-11-19 14:52:36,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:36,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:52:36,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:36,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:52:36,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:52:36,714 INFO L87 Difference]: Start difference. First operand 592 states and 973 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:52:36,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:36,981 INFO L93 Difference]: Finished difference Result 1192 states and 1974 transitions. [2021-11-19 14:52:36,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:52:36,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 121 [2021-11-19 14:52:36,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:36,991 INFO L225 Difference]: With dead ends: 1192 [2021-11-19 14:52:36,992 INFO L226 Difference]: Without dead ends: 592 [2021-11-19 14:52:36,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:52:36,999 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 134 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2603 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:37,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2603 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:52:37,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-19 14:52:37,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-19 14:52:37,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 467 states have (on average 1.6616702355460387) internal successors, (776), 487 states have internal predecessors, (776), 98 states have call successors, (98), 26 states have call predecessors, (98), 26 states have return successors, (94), 91 states have call predecessors, (94), 93 states have call successors, (94) [2021-11-19 14:52:37,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 968 transitions. [2021-11-19 14:52:37,040 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 968 transitions. Word has length 121 [2021-11-19 14:52:37,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:37,040 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 968 transitions. [2021-11-19 14:52:37,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:52:37,041 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 968 transitions. [2021-11-19 14:52:37,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 14:52:37,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:37,048 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:37,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:37,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:37,271 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:37,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:37,271 INFO L85 PathProgramCache]: Analyzing trace with hash 201462795, now seen corresponding path program 1 times [2021-11-19 14:52:37,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:37,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536268596] [2021-11-19 14:52:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:37,273 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:37,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:37,274 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:37,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:52:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:37,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:52:37,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:52:38,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:52:38,378 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:38,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536268596] [2021-11-19 14:52:38,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536268596] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:52:38,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:52:38,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:52:38,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541727592] [2021-11-19 14:52:38,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:38,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:52:38,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:38,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:52:38,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:52:38,381 INFO L87 Difference]: Start difference. First operand 592 states and 968 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:52:38,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:38,603 INFO L93 Difference]: Finished difference Result 1192 states and 1964 transitions. [2021-11-19 14:52:38,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:52:38,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 123 [2021-11-19 14:52:38,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:38,611 INFO L225 Difference]: With dead ends: 1192 [2021-11-19 14:52:38,612 INFO L226 Difference]: Without dead ends: 592 [2021-11-19 14:52:38,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:52:38,617 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 128 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2603 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:38,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2603 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:52:38,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-19 14:52:38,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-19 14:52:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 467 states have (on average 1.6509635974304069) internal successors, (771), 487 states have internal predecessors, (771), 98 states have call successors, (98), 26 states have call predecessors, (98), 26 states have return successors, (94), 91 states have call predecessors, (94), 93 states have call successors, (94) [2021-11-19 14:52:38,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 963 transitions. [2021-11-19 14:52:38,681 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 963 transitions. Word has length 123 [2021-11-19 14:52:38,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:38,682 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 963 transitions. [2021-11-19 14:52:38,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:52:38,682 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 963 transitions. [2021-11-19 14:52:38,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 14:52:38,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:38,688 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:38,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:38,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:38,903 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:38,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:38,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1430023089, now seen corresponding path program 1 times [2021-11-19 14:52:38,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:38,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545347944] [2021-11-19 14:52:38,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:38,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:38,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:38,906 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:38,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:52:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:39,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:52:39,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:52:39,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:52:40,107 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:40,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545347944] [2021-11-19 14:52:40,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545347944] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:52:40,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:52:40,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:52:40,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633957318] [2021-11-19 14:52:40,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:40,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:52:40,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:40,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:52:40,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:52:40,111 INFO L87 Difference]: Start difference. First operand 592 states and 963 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:52:40,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:40,352 INFO L93 Difference]: Finished difference Result 1213 states and 1985 transitions. [2021-11-19 14:52:40,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:52:40,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 125 [2021-11-19 14:52:40,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:40,362 INFO L225 Difference]: With dead ends: 1213 [2021-11-19 14:52:40,362 INFO L226 Difference]: Without dead ends: 622 [2021-11-19 14:52:40,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:52:40,368 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 143 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2613 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:40,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2613 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:52:40,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-11-19 14:52:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 607. [2021-11-19 14:52:40,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 482 states have (on average 1.6307053941908713) internal successors, (786), 501 states have internal predecessors, (786), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 14:52:40,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 977 transitions. [2021-11-19 14:52:40,403 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 977 transitions. Word has length 125 [2021-11-19 14:52:40,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:40,405 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 977 transitions. [2021-11-19 14:52:40,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:52:40,405 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 977 transitions. [2021-11-19 14:52:40,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 14:52:40,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:40,411 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:40,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:40,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:40,635 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:40,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:40,635 INFO L85 PathProgramCache]: Analyzing trace with hash -241041615, now seen corresponding path program 1 times [2021-11-19 14:52:40,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:40,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [676493529] [2021-11-19 14:52:40,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:40,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:40,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:40,638 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:40,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:52:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:41,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:52:41,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:52:41,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:52:41,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:41,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [676493529] [2021-11-19 14:52:41,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [676493529] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:52:41,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:52:41,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 14:52:41,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312872074] [2021-11-19 14:52:41,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:41,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:52:41,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:41,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:52:41,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:52:41,967 INFO L87 Difference]: Start difference. First operand 607 states and 977 transitions. Second operand has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:52:42,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:42,184 INFO L93 Difference]: Finished difference Result 1177 states and 1906 transitions. [2021-11-19 14:52:42,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:52:42,187 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 125 [2021-11-19 14:52:42,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:42,194 INFO L225 Difference]: With dead ends: 1177 [2021-11-19 14:52:42,194 INFO L226 Difference]: Without dead ends: 601 [2021-11-19 14:52:42,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:52:42,200 INFO L933 BasicCegarLoop]: 936 mSDtfsCounter, 131 mSDsluCounter, 4523 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5459 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:42,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5459 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:52:42,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-19 14:52:42,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 586. [2021-11-19 14:52:42,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 461 states have (on average 1.6247288503253796) internal successors, (749), 480 states have internal predecessors, (749), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 14:52:42,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 940 transitions. [2021-11-19 14:52:42,233 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 940 transitions. Word has length 125 [2021-11-19 14:52:42,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:42,234 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 940 transitions. [2021-11-19 14:52:42,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:52:42,234 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 940 transitions. [2021-11-19 14:52:42,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 14:52:42,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:42,241 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:42,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:42,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:42,467 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:42,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:42,467 INFO L85 PathProgramCache]: Analyzing trace with hash -899327607, now seen corresponding path program 1 times [2021-11-19 14:52:42,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:42,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167271291] [2021-11-19 14:52:42,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:42,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:42,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:42,470 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:42,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:52:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:42,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:52:42,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:52:43,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:52:43,665 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:43,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167271291] [2021-11-19 14:52:43,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167271291] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:52:43,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:52:43,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:52:43,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157430058] [2021-11-19 14:52:43,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:43,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:52:43,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:43,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:52:43,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:52:43,668 INFO L87 Difference]: Start difference. First operand 586 states and 940 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:52:43,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:43,812 INFO L93 Difference]: Finished difference Result 1141 states and 1844 transitions. [2021-11-19 14:52:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:52:43,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 126 [2021-11-19 14:52:43,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:43,820 INFO L225 Difference]: With dead ends: 1141 [2021-11-19 14:52:43,821 INFO L226 Difference]: Without dead ends: 586 [2021-11-19 14:52:43,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:52:43,827 INFO L933 BasicCegarLoop]: 905 mSDtfsCounter, 69 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2627 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:43,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2627 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:52:43,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-19 14:52:43,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-11-19 14:52:43,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 461 states have (on average 1.6225596529284165) internal successors, (748), 480 states have internal predecessors, (748), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 14:52:43,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 939 transitions. [2021-11-19 14:52:43,865 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 939 transitions. Word has length 126 [2021-11-19 14:52:43,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:43,865 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 939 transitions. [2021-11-19 14:52:43,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:52:43,866 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 939 transitions. [2021-11-19 14:52:43,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 14:52:43,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:43,871 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:43,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:44,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:44,094 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:44,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:44,095 INFO L85 PathProgramCache]: Analyzing trace with hash -565796020, now seen corresponding path program 1 times [2021-11-19 14:52:44,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:44,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595883126] [2021-11-19 14:52:44,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:44,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:44,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:44,097 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:44,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:52:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:44,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:52:44,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:52:44,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:52:45,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:45,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595883126] [2021-11-19 14:52:45,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595883126] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:52:45,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:52:45,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:52:45,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413637526] [2021-11-19 14:52:45,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:45,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:52:45,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:45,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:52:45,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:52:45,208 INFO L87 Difference]: Start difference. First operand 586 states and 939 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:52:45,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:45,334 INFO L93 Difference]: Finished difference Result 1141 states and 1843 transitions. [2021-11-19 14:52:45,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:52:45,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 127 [2021-11-19 14:52:45,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:45,343 INFO L225 Difference]: With dead ends: 1141 [2021-11-19 14:52:45,344 INFO L226 Difference]: Without dead ends: 586 [2021-11-19 14:52:45,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:52:45,350 INFO L933 BasicCegarLoop]: 905 mSDtfsCounter, 67 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2627 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:45,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2627 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:52:45,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-19 14:52:45,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-11-19 14:52:45,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 461 states have (on average 1.6203904555314534) internal successors, (747), 480 states have internal predecessors, (747), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 14:52:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 938 transitions. [2021-11-19 14:52:45,385 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 938 transitions. Word has length 127 [2021-11-19 14:52:45,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:45,386 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 938 transitions. [2021-11-19 14:52:45,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:52:45,386 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 938 transitions. [2021-11-19 14:52:45,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 14:52:45,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:45,393 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:45,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:45,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:45,619 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:45,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:45,619 INFO L85 PathProgramCache]: Analyzing trace with hash 712707716, now seen corresponding path program 1 times [2021-11-19 14:52:45,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:45,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131855019] [2021-11-19 14:52:45,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:45,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:45,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:45,621 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:45,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:52:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:46,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:52:46,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:52:46,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:47,010 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:52:47,011 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:47,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131855019] [2021-11-19 14:52:47,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131855019] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:52:47,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:52:47,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:52:47,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924175982] [2021-11-19 14:52:47,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:47,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:52:47,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:47,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:52:47,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:52:47,013 INFO L87 Difference]: Start difference. First operand 586 states and 938 transitions. Second operand has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:52:47,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:47,314 INFO L93 Difference]: Finished difference Result 1146 states and 1850 transitions. [2021-11-19 14:52:47,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:52:47,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 128 [2021-11-19 14:52:47,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:47,321 INFO L225 Difference]: With dead ends: 1146 [2021-11-19 14:52:47,321 INFO L226 Difference]: Without dead ends: 597 [2021-11-19 14:52:47,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:52:47,327 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 109 mSDsluCounter, 5216 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6096 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:47,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 6096 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:52:47,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-11-19 14:52:47,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 588. [2021-11-19 14:52:47,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 463 states have (on average 1.6155507559395248) internal successors, (748), 482 states have internal predecessors, (748), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 14:52:47,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 939 transitions. [2021-11-19 14:52:47,356 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 939 transitions. Word has length 128 [2021-11-19 14:52:47,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:47,357 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 939 transitions. [2021-11-19 14:52:47,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:52:47,358 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 939 transitions. [2021-11-19 14:52:47,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 14:52:47,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:47,363 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:47,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:47,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:47,585 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:47,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:47,585 INFO L85 PathProgramCache]: Analyzing trace with hash -222578665, now seen corresponding path program 1 times [2021-11-19 14:52:47,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:47,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619290292] [2021-11-19 14:52:47,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:47,587 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:47,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:47,588 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:47,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:52:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:48,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:52:48,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:52:48,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:52:48,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:48,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619290292] [2021-11-19 14:52:48,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619290292] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:52:48,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:52:48,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:52:48,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629860412] [2021-11-19 14:52:48,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:48,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:52:48,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:48,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:52:48,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:52:48,964 INFO L87 Difference]: Start difference. First operand 588 states and 939 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:52:49,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:49,278 INFO L93 Difference]: Finished difference Result 1138 states and 1831 transitions. [2021-11-19 14:52:49,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:52:49,280 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 129 [2021-11-19 14:52:49,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:49,286 INFO L225 Difference]: With dead ends: 1138 [2021-11-19 14:52:49,286 INFO L226 Difference]: Without dead ends: 593 [2021-11-19 14:52:49,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:52:49,291 INFO L933 BasicCegarLoop]: 882 mSDtfsCounter, 77 mSDsluCounter, 5222 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 6104 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:49,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 6104 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:52:49,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-11-19 14:52:49,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 590. [2021-11-19 14:52:49,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 465 states have (on average 1.610752688172043) internal successors, (749), 484 states have internal predecessors, (749), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 14:52:49,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 940 transitions. [2021-11-19 14:52:49,323 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 940 transitions. Word has length 129 [2021-11-19 14:52:49,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:49,323 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 940 transitions. [2021-11-19 14:52:49,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:52:49,324 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 940 transitions. [2021-11-19 14:52:49,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 14:52:49,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:49,348 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:49,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:49,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:49,549 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:49,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:49,550 INFO L85 PathProgramCache]: Analyzing trace with hash 895859118, now seen corresponding path program 1 times [2021-11-19 14:52:49,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:49,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021973197] [2021-11-19 14:52:49,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:49,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:49,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:49,552 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:49,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:52:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:50,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:52:50,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:52:50,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:52:50,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:50,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021973197] [2021-11-19 14:52:50,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021973197] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:52:50,841 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:52:50,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:52:50,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377439829] [2021-11-19 14:52:50,842 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:50,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:52:50,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:50,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:52:50,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:52:50,844 INFO L87 Difference]: Start difference. First operand 590 states and 940 transitions. Second operand has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 14:52:51,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:51,016 INFO L93 Difference]: Finished difference Result 1084 states and 1758 transitions. [2021-11-19 14:52:51,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:52:51,019 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 130 [2021-11-19 14:52:51,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:51,024 INFO L225 Difference]: With dead ends: 1084 [2021-11-19 14:52:51,025 INFO L226 Difference]: Without dead ends: 583 [2021-11-19 14:52:51,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:52:51,029 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 56 mSDsluCounter, 5246 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 6140 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:51,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 6140 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:52:51,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-19 14:52:51,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-19 14:52:51,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 458 states have (on average 1.6179039301310043) internal successors, (741), 477 states have internal predecessors, (741), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 14:52:51,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 932 transitions. [2021-11-19 14:52:51,058 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 932 transitions. Word has length 130 [2021-11-19 14:52:51,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:51,058 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 932 transitions. [2021-11-19 14:52:51,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 14:52:51,059 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 932 transitions. [2021-11-19 14:52:51,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 14:52:51,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:51,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:51,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:51,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:51,291 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:51,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:51,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1742067535, now seen corresponding path program 1 times [2021-11-19 14:52:51,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:51,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502352450] [2021-11-19 14:52:51,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:51,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:51,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:51,294 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:51,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:52:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:51,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:52:51,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:52:52,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:52:52,643 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:52,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502352450] [2021-11-19 14:52:52,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502352450] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:52:52,643 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:52:52,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:52:52,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216022601] [2021-11-19 14:52:52,644 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:52,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:52:52,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:52,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:52:52,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:52:52,646 INFO L87 Difference]: Start difference. First operand 583 states and 932 transitions. Second operand has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 14:52:52,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:52,874 INFO L93 Difference]: Finished difference Result 1089 states and 1772 transitions. [2021-11-19 14:52:52,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:52:52,876 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 131 [2021-11-19 14:52:52,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:52,882 INFO L225 Difference]: With dead ends: 1089 [2021-11-19 14:52:52,882 INFO L226 Difference]: Without dead ends: 580 [2021-11-19 14:52:52,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:52:52,887 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 97 mSDsluCounter, 7867 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 8753 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:52,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 8753 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:52:52,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-19 14:52:52,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2021-11-19 14:52:52,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 455 states have (on average 1.6175824175824176) internal successors, (736), 474 states have internal predecessors, (736), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 14:52:52,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 927 transitions. [2021-11-19 14:52:52,916 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 927 transitions. Word has length 131 [2021-11-19 14:52:52,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:52,917 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 927 transitions. [2021-11-19 14:52:52,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 14:52:52,917 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 927 transitions. [2021-11-19 14:52:52,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 14:52:52,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:52,923 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:52,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:53,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:53,137 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:53,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:53,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1586603313, now seen corresponding path program 1 times [2021-11-19 14:52:53,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:53,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915367849] [2021-11-19 14:52:53,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:53,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:53,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:53,139 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:53,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:52:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:53,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:52:53,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:52:53,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:52:54,345 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:54,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915367849] [2021-11-19 14:52:54,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915367849] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:52:54,346 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:52:54,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:52:54,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976448349] [2021-11-19 14:52:54,346 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:54,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:52:54,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:54,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:52:54,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:52:54,348 INFO L87 Difference]: Start difference. First operand 580 states and 927 transitions. Second operand has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-19 14:52:54,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:54,530 INFO L93 Difference]: Finished difference Result 1086 states and 1767 transitions. [2021-11-19 14:52:54,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:52:54,532 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 131 [2021-11-19 14:52:54,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:54,538 INFO L225 Difference]: With dead ends: 1086 [2021-11-19 14:52:54,538 INFO L226 Difference]: Without dead ends: 572 [2021-11-19 14:52:54,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:52:54,542 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 105 mSDsluCounter, 5205 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 6090 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:54,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 6090 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:52:54,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-19 14:52:54,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2021-11-19 14:52:54,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 447 states have (on average 1.621923937360179) internal successors, (725), 466 states have internal predecessors, (725), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 14:52:54,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 916 transitions. [2021-11-19 14:52:54,572 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 916 transitions. Word has length 131 [2021-11-19 14:52:54,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:54,573 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 916 transitions. [2021-11-19 14:52:54,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-19 14:52:54,574 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 916 transitions. [2021-11-19 14:52:54,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 14:52:54,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:54,580 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:54,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:54,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:54,795 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:54,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:54,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1952442830, now seen corresponding path program 1 times [2021-11-19 14:52:54,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:54,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502664581] [2021-11-19 14:52:54,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:54,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:54,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:54,797 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:54,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:52:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:55,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:52:55,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:52:55,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:52:56,125 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:56,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502664581] [2021-11-19 14:52:56,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502664581] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:52:56,125 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:52:56,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:52:56,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731765834] [2021-11-19 14:52:56,126 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:56,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:52:56,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:56,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:52:56,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:52:56,128 INFO L87 Difference]: Start difference. First operand 572 states and 916 transitions. Second operand has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 14:52:56,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:56,347 INFO L93 Difference]: Finished difference Result 1072 states and 1745 transitions. [2021-11-19 14:52:56,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:52:56,350 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 132 [2021-11-19 14:52:56,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:56,355 INFO L225 Difference]: With dead ends: 1072 [2021-11-19 14:52:56,355 INFO L226 Difference]: Without dead ends: 572 [2021-11-19 14:52:56,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 253 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 14:52:56,359 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 100 mSDsluCounter, 6969 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 7850 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:56,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 7850 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:52:56,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-19 14:52:56,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2021-11-19 14:52:56,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 447 states have (on average 1.6196868008948546) internal successors, (724), 466 states have internal predecessors, (724), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 14:52:56,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 915 transitions. [2021-11-19 14:52:56,387 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 915 transitions. Word has length 132 [2021-11-19 14:52:56,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:56,388 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 915 transitions. [2021-11-19 14:52:56,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 14:52:56,388 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 915 transitions. [2021-11-19 14:52:56,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 14:52:56,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:56,432 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:56,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:56,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:56,651 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:56,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:56,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1384291407, now seen corresponding path program 1 times [2021-11-19 14:52:56,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:56,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953516760] [2021-11-19 14:52:56,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:56,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:56,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:56,653 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:56,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:52:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:57,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:52:57,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:52:57,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:52:57,970 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:57,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953516760] [2021-11-19 14:52:57,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953516760] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:52:57,970 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:52:57,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:52:57,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253394762] [2021-11-19 14:52:57,971 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:57,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:52:57,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:57,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:52:57,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:52:57,972 INFO L87 Difference]: Start difference. First operand 572 states and 915 transitions. Second operand has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 14:52:58,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:58,223 INFO L93 Difference]: Finished difference Result 1116 states and 1802 transitions. [2021-11-19 14:52:58,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:52:58,225 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 133 [2021-11-19 14:52:58,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:58,231 INFO L225 Difference]: With dead ends: 1116 [2021-11-19 14:52:58,231 INFO L226 Difference]: Without dead ends: 569 [2021-11-19 14:52:58,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:52:58,236 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 175 mSDsluCounter, 5182 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 6051 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:58,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 6051 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:52:58,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-19 14:52:58,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2021-11-19 14:52:58,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 444 states have (on average 1.6126126126126126) internal successors, (716), 463 states have internal predecessors, (716), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 14:52:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 907 transitions. [2021-11-19 14:52:58,262 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 907 transitions. Word has length 133 [2021-11-19 14:52:58,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:58,262 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 907 transitions. [2021-11-19 14:52:58,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 14:52:58,263 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 907 transitions. [2021-11-19 14:52:58,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 14:52:58,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:58,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:58,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:58,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:58,493 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:58,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:58,493 INFO L85 PathProgramCache]: Analyzing trace with hash -674538985, now seen corresponding path program 1 times [2021-11-19 14:52:58,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:58,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985405242] [2021-11-19 14:52:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:58,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:58,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:58,495 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:58,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:52:58,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:58,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:52:58,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:52:59,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:52:59,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:59,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985405242] [2021-11-19 14:52:59,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985405242] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:52:59,758 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:52:59,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:52:59,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931990222] [2021-11-19 14:52:59,758 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:59,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:52:59,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:59,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:52:59,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:52:59,760 INFO L87 Difference]: Start difference. First operand 569 states and 907 transitions. Second operand has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 14:52:59,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:59,972 INFO L93 Difference]: Finished difference Result 1063 states and 1725 transitions. [2021-11-19 14:52:59,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:52:59,975 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 134 [2021-11-19 14:52:59,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:59,979 INFO L225 Difference]: With dead ends: 1063 [2021-11-19 14:52:59,980 INFO L226 Difference]: Without dead ends: 569 [2021-11-19 14:52:59,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 257 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 14:52:59,984 INFO L933 BasicCegarLoop]: 870 mSDtfsCounter, 99 mSDsluCounter, 5181 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 6051 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:59,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 6051 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:52:59,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-19 14:53:00,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2021-11-19 14:53:00,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 444 states have (on average 1.6103603603603605) internal successors, (715), 463 states have internal predecessors, (715), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 14:53:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 906 transitions. [2021-11-19 14:53:00,009 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 906 transitions. Word has length 134 [2021-11-19 14:53:00,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:53:00,010 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 906 transitions. [2021-11-19 14:53:00,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 14:53:00,010 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 906 transitions. [2021-11-19 14:53:00,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-19 14:53:00,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:53:00,015 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:53:00,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-19 14:53:00,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:53:00,239 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:53:00,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:53:00,240 INFO L85 PathProgramCache]: Analyzing trace with hash 428743936, now seen corresponding path program 1 times [2021-11-19 14:53:00,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:53:00,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093844490] [2021-11-19 14:53:00,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:53:00,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:53:00,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:53:00,242 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:53:00,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:53:00,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:53:00,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:53:00,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:53:00,976 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:53:00,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:53:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:53:01,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:53:01,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093844490] [2021-11-19 14:53:01,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093844490] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:53:01,521 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:53:01,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:53:01,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969969164] [2021-11-19 14:53:01,522 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:53:01,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:53:01,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:53:01,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:53:01,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:53:01,523 INFO L87 Difference]: Start difference. First operand 569 states and 906 transitions. Second operand has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 14:53:01,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:53:01,752 INFO L93 Difference]: Finished difference Result 1101 states and 1770 transitions. [2021-11-19 14:53:01,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:53:01,756 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 135 [2021-11-19 14:53:01,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:53:01,761 INFO L225 Difference]: With dead ends: 1101 [2021-11-19 14:53:01,762 INFO L226 Difference]: Without dead ends: 566 [2021-11-19 14:53:01,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 259 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 14:53:01,766 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 132 mSDsluCounter, 6905 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 7773 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:53:01,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 7773 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:53:01,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-19 14:53:01,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2021-11-19 14:53:01,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 441 states have (on average 1.6031746031746033) internal successors, (707), 460 states have internal predecessors, (707), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-19 14:53:01,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 898 transitions. [2021-11-19 14:53:01,793 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 898 transitions. Word has length 135 [2021-11-19 14:53:01,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:53:01,794 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 898 transitions. [2021-11-19 14:53:01,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 14:53:01,794 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 898 transitions. [2021-11-19 14:53:01,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 14:53:01,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:53:01,799 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:53:01,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:53:02,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:53:02,015 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:53:02,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:53:02,015 INFO L85 PathProgramCache]: Analyzing trace with hash -960789316, now seen corresponding path program 1 times [2021-11-19 14:53:02,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:53:02,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533678810] [2021-11-19 14:53:02,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:53:02,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:53:02,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:53:02,017 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:53:02,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:53:02,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:53:02,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:53:02,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:53:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:53:03,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:53:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:53:04,109 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:53:04,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533678810] [2021-11-19 14:53:04,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533678810] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:53:04,109 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:53:04,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-19 14:53:04,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633532024] [2021-11-19 14:53:04,110 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:53:04,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:53:04,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:53:04,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:53:04,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:53:04,111 INFO L87 Difference]: Start difference. First operand 566 states and 898 transitions. Second operand has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 8 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-19 14:53:09,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:53:09,398 INFO L93 Difference]: Finished difference Result 1191 states and 1963 transitions. [2021-11-19 14:53:09,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:53:09,399 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 8 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) Word has length 136 [2021-11-19 14:53:09,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:53:09,406 INFO L225 Difference]: With dead ends: 1191 [2021-11-19 14:53:09,406 INFO L226 Difference]: Without dead ends: 705 [2021-11-19 14:53:09,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:53:09,410 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 2115 mSDsluCounter, 2370 mSDsCounter, 0 mSdLazyCounter, 4155 mSolverCounterSat, 767 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2115 SdHoareTripleChecker+Valid, 3335 SdHoareTripleChecker+Invalid, 4922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 767 IncrementalHoareTripleChecker+Valid, 4155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:53:09,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2115 Valid, 3335 Invalid, 4922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [767 Valid, 4155 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-19 14:53:09,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-11-19 14:53:09,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 570. [2021-11-19 14:53:09,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 444 states have (on average 1.5990990990990992) internal successors, (710), 463 states have internal predecessors, (710), 98 states have call successors, (98), 27 states have call predecessors, (98), 27 states have return successors, (109), 92 states have call predecessors, (109), 93 states have call successors, (109) [2021-11-19 14:53:09,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 917 transitions. [2021-11-19 14:53:09,462 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 917 transitions. Word has length 136 [2021-11-19 14:53:09,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:53:09,463 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 917 transitions. [2021-11-19 14:53:09,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 8 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-19 14:53:09,465 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 917 transitions. [2021-11-19 14:53:09,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 14:53:09,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:53:09,469 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:53:09,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:53:09,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:53:09,695 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:53:09,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:53:09,695 INFO L85 PathProgramCache]: Analyzing trace with hash -536897086, now seen corresponding path program 1 times [2021-11-19 14:53:09,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:53:09,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1904227554] [2021-11-19 14:53:09,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:53:09,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:53:09,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:53:09,698 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:53:09,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:53:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:53:10,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:53:10,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:53:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:53:10,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:53:11,303 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:53:11,303 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:53:11,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1904227554] [2021-11-19 14:53:11,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1904227554] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:53:11,304 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:53:11,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 14:53:11,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954730749] [2021-11-19 14:53:11,304 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:53:11,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:53:11,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:53:11,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:53:11,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:53:11,305 INFO L87 Difference]: Start difference. First operand 570 states and 917 transitions. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 6 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 5 states have call successors, (21) [2021-11-19 14:53:17,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:53:17,330 INFO L93 Difference]: Finished difference Result 1994 states and 3378 transitions. [2021-11-19 14:53:17,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:53:17,331 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 6 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 5 states have call successors, (21) Word has length 137 [2021-11-19 14:53:17,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:53:17,343 INFO L225 Difference]: With dead ends: 1994 [2021-11-19 14:53:17,343 INFO L226 Difference]: Without dead ends: 1504 [2021-11-19 14:53:17,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:53:17,348 INFO L933 BasicCegarLoop]: 1463 mSDtfsCounter, 4896 mSDsluCounter, 1397 mSDsCounter, 0 mSdLazyCounter, 4023 mSolverCounterSat, 1464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4981 SdHoareTripleChecker+Valid, 2860 SdHoareTripleChecker+Invalid, 5487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1464 IncrementalHoareTripleChecker+Valid, 4023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:53:17,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4981 Valid, 2860 Invalid, 5487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1464 Valid, 4023 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-11-19 14:53:17,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2021-11-19 14:53:17,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1415. [2021-11-19 14:53:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1095 states have (on average 1.63013698630137) internal successors, (1785), 1143 states have internal predecessors, (1785), 252 states have call successors, (252), 66 states have call predecessors, (252), 67 states have return successors, (276), 242 states have call predecessors, (276), 247 states have call successors, (276) [2021-11-19 14:53:17,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 2313 transitions. [2021-11-19 14:53:17,432 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 2313 transitions. Word has length 137 [2021-11-19 14:53:17,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:53:17,433 INFO L470 AbstractCegarLoop]: Abstraction has 1415 states and 2313 transitions. [2021-11-19 14:53:17,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 6 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 5 states have call successors, (21) [2021-11-19 14:53:17,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 2313 transitions. [2021-11-19 14:53:17,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:53:17,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:53:17,437 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:53:17,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:53:17,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:53:17,658 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:53:17,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:53:17,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1351053052, now seen corresponding path program 1 times [2021-11-19 14:53:17,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:53:17,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638696905] [2021-11-19 14:53:17,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:53:17,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:53:17,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:53:17,660 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:53:17,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:53:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:53:18,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:53:18,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:53:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:53:20,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:53:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:53:25,044 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:53:25,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638696905] [2021-11-19 14:53:25,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638696905] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:53:25,045 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:53:25,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-19 14:53:25,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190683208] [2021-11-19 14:53:25,045 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:53:25,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:53:25,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:53:25,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:53:25,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:53:25,046 INFO L87 Difference]: Start difference. First operand 1415 states and 2313 transitions. Second operand has 11 states, 11 states have (on average 17.181818181818183) internal successors, (189), 11 states have internal predecessors, (189), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2021-11-19 14:53:50,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:53:50,490 INFO L93 Difference]: Finished difference Result 4682 states and 7830 transitions. [2021-11-19 14:53:50,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:53:50,495 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 17.181818181818183) internal successors, (189), 11 states have internal predecessors, (189), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) Word has length 139 [2021-11-19 14:53:50,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:53:50,529 INFO L225 Difference]: With dead ends: 4682 [2021-11-19 14:53:50,529 INFO L226 Difference]: Without dead ends: 3347 [2021-11-19 14:53:50,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:53:50,541 INFO L933 BasicCegarLoop]: 1055 mSDtfsCounter, 2776 mSDsluCounter, 2088 mSDsCounter, 0 mSdLazyCounter, 4968 mSolverCounterSat, 705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2847 SdHoareTripleChecker+Valid, 3143 SdHoareTripleChecker+Invalid, 5673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 705 IncrementalHoareTripleChecker+Valid, 4968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:53:50,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2847 Valid, 3143 Invalid, 5673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [705 Valid, 4968 Invalid, 0 Unknown, 0 Unchecked, 24.8s Time] [2021-11-19 14:53:50,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3347 states. [2021-11-19 14:53:50,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3347 to 2935. [2021-11-19 14:53:50,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2238 states have (on average 1.6394101876675604) internal successors, (3669), 2336 states have internal predecessors, (3669), 577 states have call successors, (577), 114 states have call predecessors, (577), 119 states have return successors, (634), 543 states have call predecessors, (634), 572 states have call successors, (634) [2021-11-19 14:53:50,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 4880 transitions. [2021-11-19 14:53:50,837 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 4880 transitions. Word has length 139 [2021-11-19 14:53:50,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:53:50,838 INFO L470 AbstractCegarLoop]: Abstraction has 2935 states and 4880 transitions. [2021-11-19 14:53:50,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.181818181818183) internal successors, (189), 11 states have internal predecessors, (189), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2021-11-19 14:53:50,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 4880 transitions. [2021-11-19 14:53:50,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-19 14:53:50,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:53:50,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:53:50,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:53:51,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:53:51,068 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:53:51,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:53:51,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1708519561, now seen corresponding path program 1 times [2021-11-19 14:53:51,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:53:51,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449811151] [2021-11-19 14:53:51,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:53:51,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:53:51,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:53:51,070 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:53:51,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:53:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:53:51,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:53:51,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:53:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:53:52,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:53:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:53:52,807 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:53:52,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449811151] [2021-11-19 14:53:52,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449811151] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:53:52,807 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:53:52,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-19 14:53:52,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296214122] [2021-11-19 14:53:52,808 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:53:52,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:53:52,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:53:52,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:53:52,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:53:52,810 INFO L87 Difference]: Start difference. First operand 2935 states and 4880 transitions. Second operand has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (29), 6 states have call predecessors, (29), 7 states have return successors, (28), 10 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 14:54:05,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:54:05,863 INFO L93 Difference]: Finished difference Result 11156 states and 19225 transitions. [2021-11-19 14:54:05,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 14:54:05,865 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (29), 6 states have call predecessors, (29), 7 states have return successors, (28), 10 states have call predecessors, (28), 7 states have call successors, (28) Word has length 143 [2021-11-19 14:54:05,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:54:05,937 INFO L225 Difference]: With dead ends: 11156 [2021-11-19 14:54:05,937 INFO L226 Difference]: Without dead ends: 8301 [2021-11-19 14:54:05,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-11-19 14:54:05,965 INFO L933 BasicCegarLoop]: 1932 mSDtfsCounter, 4212 mSDsluCounter, 3997 mSDsCounter, 0 mSdLazyCounter, 9716 mSolverCounterSat, 1909 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4319 SdHoareTripleChecker+Valid, 5929 SdHoareTripleChecker+Invalid, 11625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1909 IncrementalHoareTripleChecker+Valid, 9716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:54:05,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4319 Valid, 5929 Invalid, 11625 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1909 Valid, 9716 Invalid, 0 Unknown, 0 Unchecked, 12.1s Time] [2021-11-19 14:54:05,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8301 states. [2021-11-19 14:54:06,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8301 to 4991. [2021-11-19 14:54:06,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4991 states, 3674 states have (on average 1.6235710397387044) internal successors, (5965), 3882 states have internal predecessors, (5965), 1114 states have call successors, (1114), 172 states have call predecessors, (1114), 202 states have return successors, (1295), 1090 states have call predecessors, (1295), 1109 states have call successors, (1295) [2021-11-19 14:54:06,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4991 states to 4991 states and 8374 transitions. [2021-11-19 14:54:06,588 INFO L78 Accepts]: Start accepts. Automaton has 4991 states and 8374 transitions. Word has length 143 [2021-11-19 14:54:06,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:54:06,589 INFO L470 AbstractCegarLoop]: Abstraction has 4991 states and 8374 transitions. [2021-11-19 14:54:06,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (29), 6 states have call predecessors, (29), 7 states have return successors, (28), 10 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 14:54:06,590 INFO L276 IsEmpty]: Start isEmpty. Operand 4991 states and 8374 transitions. [2021-11-19 14:54:06,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-19 14:54:06,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:54:06,594 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:54:06,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:54:06,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:54:06,819 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:54:06,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:54:06,820 INFO L85 PathProgramCache]: Analyzing trace with hash -806898816, now seen corresponding path program 1 times [2021-11-19 14:54:06,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:54:06,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451588014] [2021-11-19 14:54:06,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:54:06,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:54:06,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:54:06,822 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:54:06,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 14:54:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:54:07,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:54:07,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:54:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:54:07,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:54:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:54:08,329 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:54:08,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [451588014] [2021-11-19 14:54:08,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [451588014] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:54:08,330 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:54:08,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 14:54:08,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979171868] [2021-11-19 14:54:08,330 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:54:08,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:54:08,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:54:08,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:54:08,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:54:08,331 INFO L87 Difference]: Start difference. First operand 4991 states and 8374 transitions. Second operand has 8 states, 8 states have (on average 22.75) internal successors, (182), 8 states have internal predecessors, (182), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 14:54:14,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:54:14,054 INFO L93 Difference]: Finished difference Result 18003 states and 31177 transitions. [2021-11-19 14:54:14,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:54:14,055 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.75) internal successors, (182), 8 states have internal predecessors, (182), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) Word has length 144 [2021-11-19 14:54:14,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:54:14,165 INFO L225 Difference]: With dead ends: 18003 [2021-11-19 14:54:14,166 INFO L226 Difference]: Without dead ends: 13095 [2021-11-19 14:54:14,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:54:14,195 INFO L933 BasicCegarLoop]: 1744 mSDtfsCounter, 4315 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 2708 mSolverCounterSat, 1483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4421 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 4191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1483 IncrementalHoareTripleChecker+Valid, 2708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:54:14,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4421 Valid, 3021 Invalid, 4191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1483 Valid, 2708 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-19 14:54:14,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13095 states. [2021-11-19 14:54:15,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13095 to 10438. [2021-11-19 14:54:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10438 states, 7309 states have (on average 1.6088384183882884) internal successors, (11759), 7823 states have internal predecessors, (11759), 2759 states have call successors, (2759), 288 states have call predecessors, (2759), 369 states have return successors, (3343), 2755 states have call predecessors, (3343), 2754 states have call successors, (3343) [2021-11-19 14:54:15,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10438 states to 10438 states and 17861 transitions. [2021-11-19 14:54:15,397 INFO L78 Accepts]: Start accepts. Automaton has 10438 states and 17861 transitions. Word has length 144 [2021-11-19 14:54:15,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:54:15,398 INFO L470 AbstractCegarLoop]: Abstraction has 10438 states and 17861 transitions. [2021-11-19 14:54:15,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.75) internal successors, (182), 8 states have internal predecessors, (182), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 14:54:15,398 INFO L276 IsEmpty]: Start isEmpty. Operand 10438 states and 17861 transitions. [2021-11-19 14:54:15,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-19 14:54:15,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:54:15,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:54:15,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:54:15,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:54:15,628 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:54:15,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:54:15,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1833125652, now seen corresponding path program 1 times [2021-11-19 14:54:15,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:54:15,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646450131] [2021-11-19 14:54:15,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:54:15,629 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:54:15,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:54:15,631 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:54:15,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 14:54:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:54:16,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:54:16,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:54:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:54:16,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:54:17,273 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:54:17,273 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:54:17,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646450131] [2021-11-19 14:54:17,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646450131] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:54:17,274 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:54:17,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 14:54:17,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890380154] [2021-11-19 14:54:17,274 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:54:17,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:54:17,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:54:17,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:54:17,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:54:17,275 INFO L87 Difference]: Start difference. First operand 10438 states and 17861 transitions. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 14:54:24,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:54:24,653 INFO L93 Difference]: Finished difference Result 43490 states and 76932 transitions. [2021-11-19 14:54:24,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:54:24,654 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) Word has length 145 [2021-11-19 14:54:24,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:54:24,938 INFO L225 Difference]: With dead ends: 43490 [2021-11-19 14:54:24,939 INFO L226 Difference]: Without dead ends: 33137 [2021-11-19 14:54:25,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:54:25,013 INFO L933 BasicCegarLoop]: 1752 mSDtfsCounter, 4316 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 3306 mSolverCounterSat, 1484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4423 SdHoareTripleChecker+Valid, 3073 SdHoareTripleChecker+Invalid, 4790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1484 IncrementalHoareTripleChecker+Valid, 3306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:54:25,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4423 Valid, 3073 Invalid, 4790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1484 Valid, 3306 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-19 14:54:25,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33137 states. [2021-11-19 14:54:28,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33137 to 26551. [2021-11-19 14:54:28,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26551 states, 17643 states have (on average 1.5945134047497591) internal successors, (28132), 19078 states have internal predecessors, (28132), 8152 states have call successors, (8152), 520 states have call predecessors, (8152), 755 states have return successors, (10347), 8236 states have call predecessors, (10347), 8147 states have call successors, (10347) [2021-11-19 14:54:28,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26551 states to 26551 states and 46631 transitions. [2021-11-19 14:54:28,679 INFO L78 Accepts]: Start accepts. Automaton has 26551 states and 46631 transitions. Word has length 145 [2021-11-19 14:54:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:54:28,680 INFO L470 AbstractCegarLoop]: Abstraction has 26551 states and 46631 transitions. [2021-11-19 14:54:28,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 14:54:28,680 INFO L276 IsEmpty]: Start isEmpty. Operand 26551 states and 46631 transitions. [2021-11-19 14:54:28,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-19 14:54:28,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:54:28,685 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:54:28,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:54:28,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:54:28,899 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:54:28,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:54:28,899 INFO L85 PathProgramCache]: Analyzing trace with hash 799812997, now seen corresponding path program 1 times [2021-11-19 14:54:28,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:54:28,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056592887] [2021-11-19 14:54:28,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:54:28,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:54:28,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:54:28,903 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:54:28,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 14:54:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:54:29,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:54:29,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:54:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:54:29,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:54:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:54:30,668 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:54:30,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056592887] [2021-11-19 14:54:30,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1056592887] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:54:30,668 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:54:30,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 14:54:30,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677650103] [2021-11-19 14:54:30,669 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:54:30,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:54:30,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:54:30,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:54:30,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:54:30,670 INFO L87 Difference]: Start difference. First operand 26551 states and 46631 transitions. Second operand has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 14:54:45,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:54:45,637 INFO L93 Difference]: Finished difference Result 123549 states and 223544 transitions. [2021-11-19 14:54:45,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:54:45,638 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) Word has length 146 [2021-11-19 14:54:45,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:54:46,647 INFO L225 Difference]: With dead ends: 123549 [2021-11-19 14:54:46,647 INFO L226 Difference]: Without dead ends: 97087 [2021-11-19 14:54:46,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:54:46,800 INFO L933 BasicCegarLoop]: 1760 mSDtfsCounter, 4327 mSDsluCounter, 1326 mSDsCounter, 0 mSdLazyCounter, 3311 mSolverCounterSat, 1487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4435 SdHoareTripleChecker+Valid, 3086 SdHoareTripleChecker+Invalid, 4798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1487 IncrementalHoareTripleChecker+Valid, 3311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:54:46,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4435 Valid, 3086 Invalid, 4798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1487 Valid, 3311 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-19 14:54:46,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97087 states. [2021-11-19 14:54:56,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97087 to 78400. [2021-11-19 14:54:56,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78400 states, 50081 states have (on average 1.5847327329725844) internal successors, (79365), 54437 states have internal predecessors, (79365), 26589 states have call successors, (26589), 984 states have call predecessors, (26589), 1729 states have return successors, (35497), 27041 states have call predecessors, (35497), 26584 states have call successors, (35497) [2021-11-19 14:54:57,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78400 states to 78400 states and 141451 transitions. [2021-11-19 14:54:57,258 INFO L78 Accepts]: Start accepts. Automaton has 78400 states and 141451 transitions. Word has length 146 [2021-11-19 14:54:57,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:54:57,259 INFO L470 AbstractCegarLoop]: Abstraction has 78400 states and 141451 transitions. [2021-11-19 14:54:57,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 14:54:57,259 INFO L276 IsEmpty]: Start isEmpty. Operand 78400 states and 141451 transitions. [2021-11-19 14:54:57,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-19 14:54:57,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:54:57,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:54:57,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:54:57,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:54:57,483 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:54:57,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:54:57,483 INFO L85 PathProgramCache]: Analyzing trace with hash 902764689, now seen corresponding path program 1 times [2021-11-19 14:54:57,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:54:57,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623266227] [2021-11-19 14:54:57,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:54:57,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:54:57,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:54:57,485 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:54:57,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c619262-19d7-4324-bdbc-f4828a89d873/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 14:54:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:54:57,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:54:57,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:54:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:54:58,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:54:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:54:58,919 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:54:58,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623266227] [2021-11-19 14:54:58,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623266227] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:54:58,920 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:54:58,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 14:54:58,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5989182] [2021-11-19 14:54:58,920 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:54:58,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:54:58,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:54:58,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:54:58,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:54:58,921 INFO L87 Difference]: Start difference. First operand 78400 states and 141451 transitions. Second operand has 8 states, 8 states have (on average 23.125) internal successors, (185), 8 states have internal predecessors, (185), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28)