./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF --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 5477c3156be335e627e6d8ad4c695e912cf982226281f4316d6a1123dc83cedb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:58:39,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:58:39,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:58:40,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:58:40,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:58:40,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:58:40,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:58:40,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:58:40,063 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:58:40,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:58:40,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:58:40,072 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:58:40,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:58:40,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:58:40,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:58:40,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:58:40,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:58:40,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:58:40,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:58:40,102 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:58:40,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:58:40,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:58:40,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:58:40,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:58:40,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:58:40,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:58:40,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:58:40,123 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:58:40,124 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:58:40,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:58:40,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:58:40,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:58:40,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:58:40,131 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:58:40,133 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:58:40,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:58:40,134 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:58:40,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:58:40,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:58:40,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:58:40,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:58:40,138 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:58:40,179 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:58:40,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:58:40,181 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:58:40,182 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:58:40,182 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:58:40,182 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:58:40,182 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:58:40,183 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:58:40,189 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:58:40,189 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:58:40,190 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:58:40,191 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:58:40,191 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:58:40,191 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:58:40,191 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:58:40,192 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:58:40,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:58:40,193 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:58:40,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:58:40,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:58:40,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:58:40,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:58:40,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:58:40,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:58:40,194 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:58:40,195 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:58:40,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:58:40,195 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:58:40,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:58:40,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:58:40,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:58:40,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:58:40,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:58:40,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:58:40,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:58:40,199 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:58:40,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:58:40,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:58:40,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:58:40,199 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:58:40,200 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_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5477c3156be335e627e6d8ad4c695e912cf982226281f4316d6a1123dc83cedb [2021-11-12 22:58:40,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:58:40,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:58:40,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:58:40,529 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:58:40,530 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:58:40,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c [2021-11-12 22:58:40,606 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/data/947f3000f/488cc7e74c6f4231998db2e318f38dac/FLAGafb7b65c1 [2021-11-12 22:58:41,243 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:58:41,244 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c [2021-11-12 22:58:41,279 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/data/947f3000f/488cc7e74c6f4231998db2e318f38dac/FLAGafb7b65c1 [2021-11-12 22:58:41,446 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/data/947f3000f/488cc7e74c6f4231998db2e318f38dac [2021-11-12 22:58:41,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:58:41,449 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:58:41,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:58:41,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:58:41,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:58:41,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:58:41" (1/1) ... [2021-11-12 22:58:41,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79be8e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:58:41, skipping insertion in model container [2021-11-12 22:58:41,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:58:41" (1/1) ... [2021-11-12 22:58:41,467 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:58:41,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:58:42,022 WARN L228 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_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c[40826,40839] [2021-11-12 22:58:42,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:58:42,155 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) [2021-11-12 22:58:42,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7a18c218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:58:42, skipping insertion in model container [2021-11-12 22:58:42,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:58:42,156 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:58:42,158 INFO L158 Benchmark]: Toolchain (without parser) took 707.70ms. Allocated memory is still 115.3MB. Free memory was 71.7MB in the beginning and 74.7MB in the end (delta: -3.0MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. [2021-11-12 22:58:42,159 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 115.3MB. Free memory is still 91.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:58:42,160 INFO L158 Benchmark]: CACSL2BoogieTranslator took 704.66ms. Allocated memory is still 115.3MB. Free memory was 71.5MB in the beginning and 75.0MB in the end (delta: -3.4MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. [2021-11-12 22:58:42,162 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 115.3MB. Free memory is still 91.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 704.66ms. Allocated memory is still 115.3MB. Free memory was 71.5MB in the beginning and 75.0MB in the end (delta: -3.4MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2070]: 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_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF --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 5477c3156be335e627e6d8ad4c695e912cf982226281f4316d6a1123dc83cedb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:58:44,596 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:58:44,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:58:44,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:58:44,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:58:44,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:58:44,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:58:44,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:58:44,674 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:58:44,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:58:44,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:58:44,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:58:44,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:58:44,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:58:44,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:58:44,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:58:44,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:58:44,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:58:44,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:58:44,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:58:44,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:58:44,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:58:44,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:58:44,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:58:44,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:58:44,732 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:58:44,732 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:58:44,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:58:44,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:58:44,737 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:58:44,737 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:58:44,738 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:58:44,740 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:58:44,741 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:58:44,743 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:58:44,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:58:44,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:58:44,745 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:58:44,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:58:44,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:58:44,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:58:44,749 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:58:44,795 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:58:44,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:58:44,797 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:58:44,797 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:58:44,797 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:58:44,797 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:58:44,798 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:58:44,798 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:58:44,798 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:58:44,798 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:58:44,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:58:44,801 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:58:44,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:58:44,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:58:44,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:58:44,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:58:44,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:58:44,802 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:58:44,802 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:58:44,803 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:58:44,803 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:58:44,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:58:44,803 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:58:44,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:58:44,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:58:44,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:58:44,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:58:44,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:58:44,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:58:44,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:58:44,805 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:58:44,805 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:58:44,806 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:58:44,806 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:58:44,807 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:58:44,807 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:58:44,807 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_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5477c3156be335e627e6d8ad4c695e912cf982226281f4316d6a1123dc83cedb [2021-11-12 22:58:45,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:58:45,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:58:45,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:58:45,195 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:58:45,198 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:58:45,199 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c [2021-11-12 22:58:45,280 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/data/684eb594a/4085ae596e50468ebc1415c0086a1b9e/FLAG5041f2d9a [2021-11-12 22:58:45,978 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:58:45,978 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c [2021-11-12 22:58:46,014 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/data/684eb594a/4085ae596e50468ebc1415c0086a1b9e/FLAG5041f2d9a [2021-11-12 22:58:46,172 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/data/684eb594a/4085ae596e50468ebc1415c0086a1b9e [2021-11-12 22:58:46,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:58:46,177 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:58:46,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:58:46,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:58:46,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:58:46,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:58:46" (1/1) ... [2021-11-12 22:58:46,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c6c06d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:58:46, skipping insertion in model container [2021-11-12 22:58:46,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:58:46" (1/1) ... [2021-11-12 22:58:46,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:58:46,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:58:46,745 WARN L228 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_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c[40826,40839] [2021-11-12 22:58:46,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:58:46,885 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:58:46,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:58:46,999 WARN L228 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_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c[40826,40839] [2021-11-12 22:58:47,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:58:47,081 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:58:47,144 WARN L228 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_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c[40826,40839] [2021-11-12 22:58:47,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:58:47,243 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:58:47,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:58:47 WrapperNode [2021-11-12 22:58:47,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:58:47,245 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:58:47,246 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:58:47,246 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:58:47,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:58:47" (1/1) ... [2021-11-12 22:58:47,316 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:58:47" (1/1) ... [2021-11-12 22:58:47,368 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:58:47,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:58:47,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:58:47,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:58:47,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:58:47" (1/1) ... [2021-11-12 22:58:47,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:58:47" (1/1) ... [2021-11-12 22:58:47,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:58:47" (1/1) ... [2021-11-12 22:58:47,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:58:47" (1/1) ... [2021-11-12 22:58:47,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:58:47" (1/1) ... [2021-11-12 22:58:47,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:58:47" (1/1) ... [2021-11-12 22:58:47,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:58:47" (1/1) ... [2021-11-12 22:58:47,491 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:58:47,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:58:47,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:58:47,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:58:47,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:58:47" (1/1) ... [2021-11-12 22:58:47,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:58:47,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:58:47,535 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:58:47,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:58:47,574 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-12 22:58:47,575 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-12 22:58:47,575 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 22:58:47,575 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 22:58:47,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:58:47,576 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 22:58:47,576 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 22:58:47,576 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 22:58:47,576 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 22:58:47,576 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 22:58:47,577 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 22:58:47,577 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 22:58:47,577 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 22:58:47,577 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 22:58:47,577 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 22:58:47,577 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 22:58:47,578 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 22:58:47,578 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 22:58:47,578 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 22:58:47,578 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 22:58:47,578 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 22:58:47,578 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 22:58:47,579 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 22:58:47,579 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 22:58:47,579 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 22:58:47,579 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 22:58:47,579 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 22:58:47,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:58:47,580 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 22:58:47,580 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 22:58:47,580 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 22:58:47,580 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 22:58:47,580 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-12 22:58:47,581 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-12 22:58:47,581 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 22:58:47,581 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 22:58:47,581 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 22:58:47,581 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 22:58:47,581 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 22:58:47,582 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 22:58:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 22:58:47,582 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 22:58:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 22:58:47,582 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 22:58:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 22:58:47,583 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 22:58:47,583 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 22:58:47,583 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 22:58:47,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:58:47,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:58:47,583 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 22:58:47,584 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 22:58:51,483 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:58:51,483 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:58:51,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:58:51 BoogieIcfgContainer [2021-11-12 22:58:51,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:58:51,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:58:51,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:58:51,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:58:51,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:58:46" (1/3) ... [2021-11-12 22:58:51,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e0d0d20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:58:51, skipping insertion in model container [2021-11-12 22:58:51,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:58:47" (2/3) ... [2021-11-12 22:58:51,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e0d0d20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:58:51, skipping insertion in model container [2021-11-12 22:58:51,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:58:51" (3/3) ... [2021-11-12 22:58:51,497 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product11.cil.c [2021-11-12 22:58:51,503 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:58:51,503 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:58:51,560 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:58:51,567 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 [2021-11-12 22:58:51,568 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:58:51,622 INFO L276 IsEmpty]: Start isEmpty. Operand has 561 states, 438 states have (on average 1.6917808219178083) internal successors, (741), 459 states have internal predecessors, (741), 97 states have call successors, (97), 24 states have call predecessors, (97), 24 states have return successors, (97), 91 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 22:58:51,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 22:58:51,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:51,669 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:51,669 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:51,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:51,675 INFO L85 PathProgramCache]: Analyzing trace with hash 962722650, now seen corresponding path program 1 times [2021-11-12 22:58:51,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:51,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168306395] [2021-11-12 22:58:51,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:51,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:51,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:51,695 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:51,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:58:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:52,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:58:52,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 22:58:52,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 22:58:53,102 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:53,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168306395] [2021-11-12 22:58:53,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168306395] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:58:53,104 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:58:53,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:58:53,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592559318] [2021-11-12 22:58:53,107 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:53,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:58:53,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:53,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:58:53,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:58:53,145 INFO L87 Difference]: Start difference. First operand has 561 states, 438 states have (on average 1.6917808219178083) internal successors, (741), 459 states have internal predecessors, (741), 97 states have call successors, (97), 24 states have call predecessors, (97), 24 states have return successors, (97), 91 states have call predecessors, (97), 97 states have call successors, (97) 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-12 22:58:53,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:53,225 INFO L93 Difference]: Finished difference Result 582 states and 965 transitions. [2021-11-12 22:58:53,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:58:53,227 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 125 [2021-11-12 22:58:53,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:53,253 INFO L225 Difference]: With dead ends: 582 [2021-11-12 22:58:53,253 INFO L226 Difference]: Without dead ends: 553 [2021-11-12 22:58:53,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:58:53,262 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.61ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:53,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 12.61ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:58:53,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-11-12 22:58:53,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2021-11-12 22:58:53,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 432 states have (on average 1.6898148148148149) internal successors, (730), 451 states have internal predecessors, (730), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:58:53,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 919 transitions. [2021-11-12 22:58:53,401 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 919 transitions. Word has length 125 [2021-11-12 22:58:53,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:53,404 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 919 transitions. [2021-11-12 22:58:53,404 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-12 22:58:53,405 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 919 transitions. [2021-11-12 22:58:53,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 22:58:53,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:53,414 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:53,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:53,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:53,636 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:53,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:53,637 INFO L85 PathProgramCache]: Analyzing trace with hash 612259598, now seen corresponding path program 1 times [2021-11-12 22:58:53,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:53,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079065815] [2021-11-12 22:58:53,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:53,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:53,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:53,642 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:53,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:58:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:54,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:58:54,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:58:54,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 22:58:55,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:55,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079065815] [2021-11-12 22:58:55,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079065815] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:58:55,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:58:55,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:58:55,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033141900] [2021-11-12 22:58:55,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:55,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:58:55,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:55,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:58:55,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:58:55,089 INFO L87 Difference]: Start difference. First operand 553 states and 919 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:58:55,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:55,204 INFO L93 Difference]: Finished difference Result 1097 states and 1830 transitions. [2021-11-12 22:58:55,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:58:55,205 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 127 [2021-11-12 22:58:55,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:55,212 INFO L225 Difference]: With dead ends: 1097 [2021-11-12 22:58:55,212 INFO L226 Difference]: Without dead ends: 553 [2021-11-12 22:58:55,218 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 [2021-11-12 22:58:55,219 INFO L933 BasicCegarLoop]: 905 mSDtfsCounter, 14 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2708 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.96ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.57ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:55,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2708 Invalid, 35 Unknown, 0 Unchecked, 11.96ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 41.57ms Time] [2021-11-12 22:58:55,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-11-12 22:58:55,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2021-11-12 22:58:55,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 432 states have (on average 1.6875) internal successors, (729), 451 states have internal predecessors, (729), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:58:55,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 918 transitions. [2021-11-12 22:58:55,266 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 918 transitions. Word has length 127 [2021-11-12 22:58:55,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:55,267 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 918 transitions. [2021-11-12 22:58:55,267 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:58:55,267 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 918 transitions. [2021-11-12 22:58:55,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-12 22:58:55,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:55,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:55,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:55,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:55,497 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:55,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:55,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1908031680, now seen corresponding path program 1 times [2021-11-12 22:58:55,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:55,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083034283] [2021-11-12 22:58:55,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:55,499 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:55,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:55,501 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:55,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:58:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:56,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:58:56,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:56,375 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:58:56,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 22:58:56,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:56,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083034283] [2021-11-12 22:58:56,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083034283] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:58:56,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:58:56,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:58:56,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675233565] [2021-11-12 22:58:56,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:56,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:58:56,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:56,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:58:56,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:58:56,723 INFO L87 Difference]: Start difference. First operand 553 states and 918 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:58:56,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:56,825 INFO L93 Difference]: Finished difference Result 1097 states and 1828 transitions. [2021-11-12 22:58:56,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:58:56,826 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 129 [2021-11-12 22:58:56,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:56,833 INFO L225 Difference]: With dead ends: 1097 [2021-11-12 22:58:56,833 INFO L226 Difference]: Without dead ends: 553 [2021-11-12 22:58:56,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:58:56,838 INFO L933 BasicCegarLoop]: 905 mSDtfsCounter, 12 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2708 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.74ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.50ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:56,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2708 Invalid, 33 Unknown, 0 Unchecked, 9.74ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 37.50ms Time] [2021-11-12 22:58:56,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-11-12 22:58:56,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2021-11-12 22:58:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 432 states have (on average 1.6851851851851851) internal successors, (728), 451 states have internal predecessors, (728), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:58:56,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 917 transitions. [2021-11-12 22:58:56,888 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 917 transitions. Word has length 129 [2021-11-12 22:58:56,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:56,889 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 917 transitions. [2021-11-12 22:58:56,889 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:58:56,889 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 917 transitions. [2021-11-12 22:58:56,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 22:58:56,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:56,896 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:56,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:57,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:57,108 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:57,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:57,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1032252274, now seen corresponding path program 1 times [2021-11-12 22:58:57,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:57,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925080123] [2021-11-12 22:58:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:57,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:57,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:57,112 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:57,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:58:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:57,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:58:57,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:58:58,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 22:58:58,417 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:58,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925080123] [2021-11-12 22:58:58,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925080123] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:58:58,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:58:58,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:58:58,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430133551] [2021-11-12 22:58:58,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:58,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:58:58,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:58,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:58:58,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:58:58,420 INFO L87 Difference]: Start difference. First operand 553 states and 917 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:58:58,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:58,525 INFO L93 Difference]: Finished difference Result 1101 states and 1831 transitions. [2021-11-12 22:58:58,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:58:58,526 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 131 [2021-11-12 22:58:58,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:58,532 INFO L225 Difference]: With dead ends: 1101 [2021-11-12 22:58:58,532 INFO L226 Difference]: Without dead ends: 559 [2021-11-12 22:58:58,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:58:58,544 INFO L933 BasicCegarLoop]: 905 mSDtfsCounter, 13 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2708 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.65ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.32ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:58,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2708 Invalid, 35 Unknown, 0 Unchecked, 11.65ms Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 47.32ms Time] [2021-11-12 22:58:58,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-12 22:58:58,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-12 22:58:58,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 437 states have (on average 1.677345537757437) internal successors, (733), 456 states have internal predecessors, (733), 97 states have call successors, (97), 25 states have call predecessors, (97), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:58:58,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 922 transitions. [2021-11-12 22:58:58,587 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 922 transitions. Word has length 131 [2021-11-12 22:58:58,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:58,588 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 922 transitions. [2021-11-12 22:58:58,588 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:58:58,589 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 922 transitions. [2021-11-12 22:58:58,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-12 22:58:58,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:58,597 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:58,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:58,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:58,804 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:58,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:58,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1063424087, now seen corresponding path program 1 times [2021-11-12 22:58:58,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:58,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454997396] [2021-11-12 22:58:58,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:58,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:58,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:58,806 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:58,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:58:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:59,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:58:59,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:58:59,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 22:59:00,087 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:00,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454997396] [2021-11-12 22:59:00,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454997396] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:59:00,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:59:00,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:59:00,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342475375] [2021-11-12 22:59:00,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:00,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:59:00,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:00,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:59:00,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:59:00,090 INFO L87 Difference]: Start difference. First operand 559 states and 922 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:59:00,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:00,170 INFO L93 Difference]: Finished difference Result 1100 states and 1822 transitions. [2021-11-12 22:59:00,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:59:00,171 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 132 [2021-11-12 22:59:00,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:00,177 INFO L225 Difference]: With dead ends: 1100 [2021-11-12 22:59:00,177 INFO L226 Difference]: Without dead ends: 559 [2021-11-12 22:59:00,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:59:00,184 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 8 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2709 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.14ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.88ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:00,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2709 Invalid, 30 Unknown, 0 Unchecked, 6.14ms Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 32.88ms Time] [2021-11-12 22:59:00,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-12 22:59:00,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-12 22:59:00,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 437 states have (on average 1.6750572082379862) internal successors, (732), 456 states have internal predecessors, (732), 97 states have call successors, (97), 25 states have call predecessors, (97), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:59:00,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 921 transitions. [2021-11-12 22:59:00,214 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 921 transitions. Word has length 132 [2021-11-12 22:59:00,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:00,215 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 921 transitions. [2021-11-12 22:59:00,215 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:59:00,215 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 921 transitions. [2021-11-12 22:59:00,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-12 22:59:00,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:00,220 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:00,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:00,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:00,436 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:00,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:00,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1178788366, now seen corresponding path program 1 times [2021-11-12 22:59:00,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:00,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [634058535] [2021-11-12 22:59:00,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:00,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:00,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:00,439 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:00,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:59:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:00,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:59:00,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:01,284 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:59:01,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 22:59:01,634 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:01,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [634058535] [2021-11-12 22:59:01,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [634058535] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:59:01,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:59:01,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:59:01,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515863581] [2021-11-12 22:59:01,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:01,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:59:01,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:01,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:59:01,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:59:01,636 INFO L87 Difference]: Start difference. First operand 559 states and 921 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:59:01,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:01,714 INFO L93 Difference]: Finished difference Result 1100 states and 1821 transitions. [2021-11-12 22:59:01,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:59:01,715 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 133 [2021-11-12 22:59:01,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:01,720 INFO L225 Difference]: With dead ends: 1100 [2021-11-12 22:59:01,721 INFO L226 Difference]: Without dead ends: 559 [2021-11-12 22:59:01,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:59:01,725 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 6 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2709 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.07ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:01,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2709 Invalid, 28 Unknown, 0 Unchecked, 6.07ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 30.07ms Time] [2021-11-12 22:59:01,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-12 22:59:01,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-12 22:59:01,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 437 states have (on average 1.6727688787185355) internal successors, (731), 456 states have internal predecessors, (731), 97 states have call successors, (97), 25 states have call predecessors, (97), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:59:01,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 920 transitions. [2021-11-12 22:59:01,766 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 920 transitions. Word has length 133 [2021-11-12 22:59:01,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:01,767 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 920 transitions. [2021-11-12 22:59:01,767 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:59:01,767 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 920 transitions. [2021-11-12 22:59:01,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-12 22:59:01,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:01,773 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:01,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:01,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:01,994 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:01,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:01,995 INFO L85 PathProgramCache]: Analyzing trace with hash 390848205, now seen corresponding path program 1 times [2021-11-12 22:59:01,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:01,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991801962] [2021-11-12 22:59:01,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:01,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:01,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:01,998 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:02,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:59:02,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:02,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:59:02,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:59:02,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:59:03,417 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:03,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991801962] [2021-11-12 22:59:03,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991801962] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:59:03,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:59:03,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 22:59:03,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954822726] [2021-11-12 22:59:03,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:03,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:59:03,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:03,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:59:03,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:59:03,419 INFO L87 Difference]: Start difference. First operand 559 states and 920 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:59:03,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:03,682 INFO L93 Difference]: Finished difference Result 1117 states and 1849 transitions. [2021-11-12 22:59:03,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:59:03,684 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 134 [2021-11-12 22:59:03,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:03,690 INFO L225 Difference]: With dead ends: 1117 [2021-11-12 22:59:03,690 INFO L226 Difference]: Without dead ends: 580 [2021-11-12 22:59:03,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:59:03,694 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 148 mSDsluCounter, 4413 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 144.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5317 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.86ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 159.87ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:03,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5317 Invalid, 85 Unknown, 0 Unchecked, 11.86ms Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 159.87ms Time] [2021-11-12 22:59:03,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-12 22:59:03,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 578. [2021-11-12 22:59:03,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 453 states have (on average 1.6710816777041944) internal successors, (757), 474 states have internal predecessors, (757), 98 states have call successors, (98), 25 states have call predecessors, (98), 26 states have return successors, (96), 91 states have call predecessors, (96), 93 states have call successors, (96) [2021-11-12 22:59:03,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 951 transitions. [2021-11-12 22:59:03,724 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 951 transitions. Word has length 134 [2021-11-12 22:59:03,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:03,725 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 951 transitions. [2021-11-12 22:59:03,725 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:59:03,725 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 951 transitions. [2021-11-12 22:59:03,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-12 22:59:03,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:03,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:03,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-12 22:59:03,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:03,948 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:03,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:03,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1677330510, now seen corresponding path program 1 times [2021-11-12 22:59:03,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:03,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418789814] [2021-11-12 22:59:03,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:03,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:03,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:03,950 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:03,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:59:04,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:04,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:59:04,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:59:04,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 22:59:05,256 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:05,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418789814] [2021-11-12 22:59:05,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418789814] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:59:05,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:59:05,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-12 22:59:05,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741541789] [2021-11-12 22:59:05,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:05,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:59:05,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:05,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:59:05,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:59:05,258 INFO L87 Difference]: Start difference. First operand 578 states and 951 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:59:05,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:05,347 INFO L93 Difference]: Finished difference Result 1130 states and 1871 transitions. [2021-11-12 22:59:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:59:05,348 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 134 [2021-11-12 22:59:05,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:05,354 INFO L225 Difference]: With dead ends: 1130 [2021-11-12 22:59:05,354 INFO L226 Difference]: Without dead ends: 574 [2021-11-12 22:59:05,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:59:05,358 INFO L933 BasicCegarLoop]: 905 mSDtfsCounter, 8 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2708 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.90ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.49ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:05,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2708 Invalid, 30 Unknown, 0 Unchecked, 5.90ms Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 44.49ms Time] [2021-11-12 22:59:05,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-12 22:59:05,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-12 22:59:05,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 451 states have (on average 1.671840354767184) internal successors, (754), 471 states have internal predecessors, (754), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2021-11-12 22:59:05,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 944 transitions. [2021-11-12 22:59:05,385 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 944 transitions. Word has length 134 [2021-11-12 22:59:05,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:05,385 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 944 transitions. [2021-11-12 22:59:05,385 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:59:05,385 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 944 transitions. [2021-11-12 22:59:05,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-12 22:59:05,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:05,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:05,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:05,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:05,604 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:05,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:05,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1255246149, now seen corresponding path program 1 times [2021-11-12 22:59:05,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:05,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840877146] [2021-11-12 22:59:05,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:05,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:05,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:05,607 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:05,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:59:06,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:06,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:59:06,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:59:06,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:59:06,845 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:06,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840877146] [2021-11-12 22:59:06,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840877146] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:59:06,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:59:06,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:59:06,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186733944] [2021-11-12 22:59:06,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:06,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:59:06,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:06,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:59:06,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:59:06,848 INFO L87 Difference]: Start difference. First operand 574 states and 944 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:59:07,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:07,094 INFO L93 Difference]: Finished difference Result 1156 states and 1916 transitions. [2021-11-12 22:59:07,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:59:07,096 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 135 [2021-11-12 22:59:07,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:07,101 INFO L225 Difference]: With dead ends: 1156 [2021-11-12 22:59:07,101 INFO L226 Difference]: Without dead ends: 574 [2021-11-12 22:59:07,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:59:07,107 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 134 mSDsluCounter, 1664 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 146.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2516 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.05ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 173.59ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:07,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2516 Invalid, 131 Unknown, 0 Unchecked, 29.05ms Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 173.59ms Time] [2021-11-12 22:59:07,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-12 22:59:07,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-12 22:59:07,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 451 states have (on average 1.6607538802660753) internal successors, (749), 471 states have internal predecessors, (749), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2021-11-12 22:59:07,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 939 transitions. [2021-11-12 22:59:07,134 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 939 transitions. Word has length 135 [2021-11-12 22:59:07,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:07,134 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 939 transitions. [2021-11-12 22:59:07,134 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:59:07,134 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 939 transitions. [2021-11-12 22:59:07,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 22:59:07,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:07,140 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:07,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:07,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:07,353 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:07,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:07,353 INFO L85 PathProgramCache]: Analyzing trace with hash 277041591, now seen corresponding path program 1 times [2021-11-12 22:59:07,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:07,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072242986] [2021-11-12 22:59:07,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:07,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:07,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:07,356 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:07,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:59:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:07,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:59:07,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:59:08,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:08,583 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:59:08,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:08,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072242986] [2021-11-12 22:59:08,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072242986] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:59:08,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:59:08,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:59:08,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131468799] [2021-11-12 22:59:08,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:08,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:59:08,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:08,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:59:08,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:59:08,586 INFO L87 Difference]: Start difference. First operand 574 states and 939 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:59:08,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:08,788 INFO L93 Difference]: Finished difference Result 1156 states and 1906 transitions. [2021-11-12 22:59:08,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:59:08,790 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 137 [2021-11-12 22:59:08,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:08,795 INFO L225 Difference]: With dead ends: 1156 [2021-11-12 22:59:08,795 INFO L226 Difference]: Without dead ends: 574 [2021-11-12 22:59:08,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:59:08,799 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 128 mSDsluCounter, 1664 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 131.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2516 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.30ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 154.23ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:08,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2516 Invalid, 121 Unknown, 0 Unchecked, 7.30ms Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 154.23ms Time] [2021-11-12 22:59:08,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-12 22:59:08,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-12 22:59:08,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 451 states have (on average 1.6496674057649667) internal successors, (744), 471 states have internal predecessors, (744), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2021-11-12 22:59:08,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 934 transitions. [2021-11-12 22:59:08,851 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 934 transitions. Word has length 137 [2021-11-12 22:59:08,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:08,852 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 934 transitions. [2021-11-12 22:59:08,852 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:59:08,852 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 934 transitions. [2021-11-12 22:59:08,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 22:59:08,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:08,857 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:08,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:09,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:09,081 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:09,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:09,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1018798693, now seen corresponding path program 1 times [2021-11-12 22:59:09,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:09,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709184054] [2021-11-12 22:59:09,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:09,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:09,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:09,084 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:09,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:59:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:09,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:59:09,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:59:09,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:59:10,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:10,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709184054] [2021-11-12 22:59:10,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709184054] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:59:10,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:59:10,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:59:10,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367596263] [2021-11-12 22:59:10,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:10,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:59:10,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:10,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:59:10,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:59:10,307 INFO L87 Difference]: Start difference. First operand 574 states and 934 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:59:10,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:10,503 INFO L93 Difference]: Finished difference Result 1177 states and 1927 transitions. [2021-11-12 22:59:10,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:59:10,505 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 139 [2021-11-12 22:59:10,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:10,510 INFO L225 Difference]: With dead ends: 1177 [2021-11-12 22:59:10,511 INFO L226 Difference]: Without dead ends: 604 [2021-11-12 22:59:10,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:59:10,515 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 143 mSDsluCounter, 1664 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 126.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2526 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.95ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 157.77ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:10,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2526 Invalid, 131 Unknown, 0 Unchecked, 5.95ms Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 157.77ms Time] [2021-11-12 22:59:10,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-11-12 22:59:10,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 589. [2021-11-12 22:59:10,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 466 states have (on average 1.628755364806867) internal successors, (759), 485 states have internal predecessors, (759), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:59:10,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 948 transitions. [2021-11-12 22:59:10,540 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 948 transitions. Word has length 139 [2021-11-12 22:59:10,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:10,541 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 948 transitions. [2021-11-12 22:59:10,542 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:59:10,542 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 948 transitions. [2021-11-12 22:59:10,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 22:59:10,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:10,547 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:10,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:10,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:10,760 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:10,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:10,761 INFO L85 PathProgramCache]: Analyzing trace with hash 916705563, now seen corresponding path program 1 times [2021-11-12 22:59:10,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:10,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786548190] [2021-11-12 22:59:10,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:10,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:10,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:10,783 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:10,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:59:11,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:11,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:59:11,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:59:11,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:59:11,978 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:11,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786548190] [2021-11-12 22:59:11,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786548190] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:59:11,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:59:11,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-12 22:59:11,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693570237] [2021-11-12 22:59:11,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:11,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:59:11,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:11,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:59:11,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:59:11,981 INFO L87 Difference]: Start difference. First operand 589 states and 948 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:59:12,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:12,144 INFO L93 Difference]: Finished difference Result 1141 states and 1848 transitions. [2021-11-12 22:59:12,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:59:12,146 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 139 [2021-11-12 22:59:12,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:12,151 INFO L225 Difference]: With dead ends: 1141 [2021-11-12 22:59:12,151 INFO L226 Difference]: Without dead ends: 583 [2021-11-12 22:59:12,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:59:12,157 INFO L933 BasicCegarLoop]: 907 mSDtfsCounter, 131 mSDsluCounter, 4378 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5285 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.10ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 117.21ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:12,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5285 Invalid, 75 Unknown, 0 Unchecked, 9.10ms Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 117.21ms Time] [2021-11-12 22:59:12,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-12 22:59:12,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 568. [2021-11-12 22:59:12,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 445 states have (on average 1.6224719101123595) internal successors, (722), 464 states have internal predecessors, (722), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:59:12,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 911 transitions. [2021-11-12 22:59:12,182 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 911 transitions. Word has length 139 [2021-11-12 22:59:12,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:12,182 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 911 transitions. [2021-11-12 22:59:12,183 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:59:12,183 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 911 transitions. [2021-11-12 22:59:12,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-12 22:59:12,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:12,188 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:12,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:12,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:12,404 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:12,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:12,405 INFO L85 PathProgramCache]: Analyzing trace with hash -2021454902, now seen corresponding path program 1 times [2021-11-12 22:59:12,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:12,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2004910928] [2021-11-12 22:59:12,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:12,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:12,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:12,407 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:12,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:59:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:12,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:59:12,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:59:13,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:13,583 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:59:13,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:13,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2004910928] [2021-11-12 22:59:13,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2004910928] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:59:13,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:59:13,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:59:13,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514524643] [2021-11-12 22:59:13,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:13,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:59:13,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:13,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:59:13,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:59:13,587 INFO L87 Difference]: Start difference. First operand 568 states and 911 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:59:13,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:13,710 INFO L93 Difference]: Finished difference Result 1105 states and 1786 transitions. [2021-11-12 22:59:13,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:59:13,711 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 140 [2021-11-12 22:59:13,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:13,716 INFO L225 Difference]: With dead ends: 1105 [2021-11-12 22:59:13,717 INFO L226 Difference]: Without dead ends: 568 [2021-11-12 22:59:13,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:59:13,721 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 69 mSDsluCounter, 1664 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2540 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.76ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 89.15ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:13,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2540 Invalid, 54 Unknown, 0 Unchecked, 4.76ms Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 89.15ms Time] [2021-11-12 22:59:13,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-12 22:59:13,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-12 22:59:13,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 445 states have (on average 1.6202247191011236) internal successors, (721), 464 states have internal predecessors, (721), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:59:13,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 910 transitions. [2021-11-12 22:59:13,745 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 910 transitions. Word has length 140 [2021-11-12 22:59:13,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:13,745 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 910 transitions. [2021-11-12 22:59:13,745 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:59:13,746 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 910 transitions. [2021-11-12 22:59:13,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-12 22:59:13,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:13,750 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:13,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:13,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:13,974 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:13,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:13,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1860635434, now seen corresponding path program 1 times [2021-11-12 22:59:13,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:13,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401638951] [2021-11-12 22:59:13,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:13,975 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:13,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:13,977 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:13,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:59:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:14,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:59:14,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:59:14,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:59:15,147 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:15,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401638951] [2021-11-12 22:59:15,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401638951] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:59:15,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:59:15,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:59:15,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226063904] [2021-11-12 22:59:15,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:15,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:59:15,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:15,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:59:15,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:59:15,150 INFO L87 Difference]: Start difference. First operand 568 states and 910 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:59:15,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:15,265 INFO L93 Difference]: Finished difference Result 1105 states and 1785 transitions. [2021-11-12 22:59:15,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:59:15,266 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 141 [2021-11-12 22:59:15,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:15,272 INFO L225 Difference]: With dead ends: 1105 [2021-11-12 22:59:15,272 INFO L226 Difference]: Without dead ends: 568 [2021-11-12 22:59:15,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:59:15,275 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 67 mSDsluCounter, 1664 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2540 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.49ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.73ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:15,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2540 Invalid, 52 Unknown, 0 Unchecked, 4.49ms Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 83.73ms Time] [2021-11-12 22:59:15,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-12 22:59:15,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-12 22:59:15,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 445 states have (on average 1.6179775280898876) internal successors, (720), 464 states have internal predecessors, (720), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:59:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 909 transitions. [2021-11-12 22:59:15,298 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 909 transitions. Word has length 141 [2021-11-12 22:59:15,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:15,299 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 909 transitions. [2021-11-12 22:59:15,299 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:59:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 909 transitions. [2021-11-12 22:59:15,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-12 22:59:15,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:15,304 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:15,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:15,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:15,527 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:15,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:15,528 INFO L85 PathProgramCache]: Analyzing trace with hash 8191653, now seen corresponding path program 1 times [2021-11-12 22:59:15,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:15,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277697928] [2021-11-12 22:59:15,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:15,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:15,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:15,530 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:15,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:59:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:16,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:59:16,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:59:16,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:16,902 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:59:16,903 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:16,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277697928] [2021-11-12 22:59:16,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277697928] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:59:16,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:59:16,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 22:59:16,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225438056] [2021-11-12 22:59:16,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:16,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:59:16,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:16,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:59:16,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:59:16,905 INFO L87 Difference]: Start difference. First operand 568 states and 909 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:59:17,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:17,148 INFO L93 Difference]: Finished difference Result 1110 states and 1792 transitions. [2021-11-12 22:59:17,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:59:17,149 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 142 [2021-11-12 22:59:17,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:17,154 INFO L225 Difference]: With dead ends: 1110 [2021-11-12 22:59:17,154 INFO L226 Difference]: Without dead ends: 579 [2021-11-12 22:59:17,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:59:17,158 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 109 mSDsluCounter, 5042 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 141.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5893 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.52ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 173.31ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:17,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5893 Invalid, 152 Unknown, 0 Unchecked, 9.52ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 173.31ms Time] [2021-11-12 22:59:17,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-11-12 22:59:17,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 570. [2021-11-12 22:59:17,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 447 states have (on average 1.6129753914988814) internal successors, (721), 466 states have internal predecessors, (721), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:59:17,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 910 transitions. [2021-11-12 22:59:17,182 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 910 transitions. Word has length 142 [2021-11-12 22:59:17,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:17,183 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 910 transitions. [2021-11-12 22:59:17,183 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:59:17,183 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 910 transitions. [2021-11-12 22:59:17,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-12 22:59:17,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:17,189 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:17,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:17,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:17,404 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:17,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:17,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1291035327, now seen corresponding path program 1 times [2021-11-12 22:59:17,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:17,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838425994] [2021-11-12 22:59:17,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:17,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:17,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:17,407 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:17,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:59:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:17,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:59:17,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:59:18,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:59:18,789 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:18,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838425994] [2021-11-12 22:59:18,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838425994] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:59:18,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:59:18,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 22:59:18,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069193549] [2021-11-12 22:59:18,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:18,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:59:18,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:18,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:59:18,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:59:18,790 INFO L87 Difference]: Start difference. First operand 570 states and 910 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:59:19,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:19,001 INFO L93 Difference]: Finished difference Result 1102 states and 1773 transitions. [2021-11-12 22:59:19,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:59:19,003 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 143 [2021-11-12 22:59:19,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:19,006 INFO L225 Difference]: With dead ends: 1102 [2021-11-12 22:59:19,006 INFO L226 Difference]: Without dead ends: 575 [2021-11-12 22:59:19,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:59:19,010 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 77 mSDsluCounter, 5048 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 127.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 5901 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.49ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 151.54ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:19,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 5901 Invalid, 152 Unknown, 0 Unchecked, 6.49ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 151.54ms Time] [2021-11-12 22:59:19,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-11-12 22:59:19,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 572. [2021-11-12 22:59:19,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 449 states have (on average 1.6080178173719377) internal successors, (722), 468 states have internal predecessors, (722), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:59:19,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 911 transitions. [2021-11-12 22:59:19,033 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 911 transitions. Word has length 143 [2021-11-12 22:59:19,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:19,033 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 911 transitions. [2021-11-12 22:59:19,034 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, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:59:19,034 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 911 transitions. [2021-11-12 22:59:19,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-12 22:59:19,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:19,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:19,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:19,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:19,252 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:19,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:19,253 INFO L85 PathProgramCache]: Analyzing trace with hash -43114129, now seen corresponding path program 1 times [2021-11-12 22:59:19,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:19,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853612959] [2021-11-12 22:59:19,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:19,254 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:19,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:19,255 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:19,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:59:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:19,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:59:19,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:59:20,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:59:20,467 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:20,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853612959] [2021-11-12 22:59:20,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853612959] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:59:20,467 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:59:20,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:59:20,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353329107] [2021-11-12 22:59:20,467 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:20,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:59:20,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:20,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:59:20,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:59:20,469 INFO L87 Difference]: Start difference. First operand 572 states and 911 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, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:59:20,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:20,663 INFO L93 Difference]: Finished difference Result 1048 states and 1700 transitions. [2021-11-12 22:59:20,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:59:20,664 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, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 144 [2021-11-12 22:59:20,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:20,669 INFO L225 Difference]: With dead ends: 1048 [2021-11-12 22:59:20,669 INFO L226 Difference]: Without dead ends: 565 [2021-11-12 22:59:20,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:59:20,675 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 109 mSDsluCounter, 5121 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5986 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.61ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 120.50ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:20,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5986 Invalid, 96 Unknown, 0 Unchecked, 13.61ms Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 120.50ms Time] [2021-11-12 22:59:20,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-12 22:59:20,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-11-12 22:59:20,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 442 states have (on average 1.6153846153846154) internal successors, (714), 461 states have internal predecessors, (714), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:59:20,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 903 transitions. [2021-11-12 22:59:20,701 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 903 transitions. Word has length 144 [2021-11-12 22:59:20,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:20,701 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 903 transitions. [2021-11-12 22:59:20,701 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, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:59:20,702 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 903 transitions. [2021-11-12 22:59:20,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-12 22:59:20,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:20,707 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:20,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:20,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:20,928 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:20,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:20,929 INFO L85 PathProgramCache]: Analyzing trace with hash 309035805, now seen corresponding path program 1 times [2021-11-12 22:59:20,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:20,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280483750] [2021-11-12 22:59:20,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:20,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:20,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:20,931 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:20,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:59:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:21,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:59:21,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:59:21,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:22,111 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:59:22,111 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:22,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280483750] [2021-11-12 22:59:22,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280483750] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:59:22,111 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:59:22,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:59:22,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843581122] [2021-11-12 22:59:22,112 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:22,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:59:22,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:22,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:59:22,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:59:22,114 INFO L87 Difference]: Start difference. First operand 565 states and 903 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, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:59:22,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:22,269 INFO L93 Difference]: Finished difference Result 1053 states and 1714 transitions. [2021-11-12 22:59:22,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:59:22,271 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, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 145 [2021-11-12 22:59:22,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:22,275 INFO L225 Difference]: With dead ends: 1053 [2021-11-12 22:59:22,275 INFO L226 Difference]: Without dead ends: 562 [2021-11-12 22:59:22,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:59:22,279 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 171 mSDsluCounter, 5123 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 5980 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.21ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 112.63ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:22,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 5980 Invalid, 95 Unknown, 0 Unchecked, 8.21ms Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 112.63ms Time] [2021-11-12 22:59:22,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-12 22:59:22,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2021-11-12 22:59:22,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 439 states have (on average 1.6150341685649203) internal successors, (709), 458 states have internal predecessors, (709), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:59:22,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 898 transitions. [2021-11-12 22:59:22,300 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 898 transitions. Word has length 145 [2021-11-12 22:59:22,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:22,300 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 898 transitions. [2021-11-12 22:59:22,301 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, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:59:22,301 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 898 transitions. [2021-11-12 22:59:22,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-12 22:59:22,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:22,306 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:22,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:22,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:22,520 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:22,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:22,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1304371101, now seen corresponding path program 1 times [2021-11-12 22:59:22,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:22,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463472471] [2021-11-12 22:59:22,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:22,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:22,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:22,522 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:22,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:59:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:23,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:59:23,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:59:23,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:59:23,737 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:23,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463472471] [2021-11-12 22:59:23,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463472471] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:59:23,737 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:59:23,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:59:23,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326019010] [2021-11-12 22:59:23,737 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:23,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:59:23,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:23,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:59:23,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:59:23,739 INFO L87 Difference]: Start difference. First operand 562 states and 898 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, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:59:23,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:23,891 INFO L93 Difference]: Finished difference Result 1050 states and 1709 transitions. [2021-11-12 22:59:23,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:59:23,892 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, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 145 [2021-11-12 22:59:23,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:23,896 INFO L225 Difference]: With dead ends: 1050 [2021-11-12 22:59:23,896 INFO L226 Difference]: Without dead ends: 554 [2021-11-12 22:59:23,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:59:23,900 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 142 mSDsluCounter, 4217 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 5073 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.54ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 112.09ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:23,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 5073 Invalid, 68 Unknown, 0 Unchecked, 6.54ms Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 112.09ms Time] [2021-11-12 22:59:23,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-12 22:59:23,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2021-11-12 22:59:23,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 431 states have (on average 1.6194895591647331) internal successors, (698), 450 states have internal predecessors, (698), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:59:23,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 887 transitions. [2021-11-12 22:59:23,920 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 887 transitions. Word has length 145 [2021-11-12 22:59:23,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:23,920 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 887 transitions. [2021-11-12 22:59:23,920 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, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 22:59:23,920 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 887 transitions. [2021-11-12 22:59:23,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-12 22:59:23,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:23,925 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:23,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:24,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:24,140 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:24,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:24,141 INFO L85 PathProgramCache]: Analyzing trace with hash 672711763, now seen corresponding path program 1 times [2021-11-12 22:59:24,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:24,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414504228] [2021-11-12 22:59:24,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:24,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:24,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:24,144 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:24,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:59:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:24,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:59:24,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:59:24,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:59:25,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:25,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414504228] [2021-11-12 22:59:25,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414504228] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:59:25,565 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:59:25,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:59:25,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24253128] [2021-11-12 22:59:25,566 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:25,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:59:25,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:25,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:59:25,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:59:25,568 INFO L87 Difference]: Start difference. First operand 554 states and 887 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, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:59:25,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:25,781 INFO L93 Difference]: Finished difference Result 1036 states and 1687 transitions. [2021-11-12 22:59:25,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:59:25,783 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, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 146 [2021-11-12 22:59:25,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:25,787 INFO L225 Difference]: With dead ends: 1036 [2021-11-12 22:59:25,788 INFO L226 Difference]: Without dead ends: 554 [2021-11-12 22:59:25,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:59:25,791 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 101 mSDsluCounter, 6699 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 135.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 7551 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.68ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 151.18ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:25,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 7551 Invalid, 137 Unknown, 0 Unchecked, 8.68ms Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 151.18ms Time] [2021-11-12 22:59:25,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-12 22:59:25,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2021-11-12 22:59:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 431 states have (on average 1.617169373549884) internal successors, (697), 450 states have internal predecessors, (697), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:59:25,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 886 transitions. [2021-11-12 22:59:25,812 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 886 transitions. Word has length 146 [2021-11-12 22:59:25,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:25,813 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 886 transitions. [2021-11-12 22:59:25,813 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, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:59:25,813 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 886 transitions. [2021-11-12 22:59:25,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 22:59:25,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:25,818 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:25,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:26,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:26,041 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:26,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:26,041 INFO L85 PathProgramCache]: Analyzing trace with hash 438008027, now seen corresponding path program 1 times [2021-11-12 22:59:26,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:26,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224885971] [2021-11-12 22:59:26,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:26,042 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:26,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:26,044 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:26,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:59:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:26,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:59:26,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:59:26,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:59:27,491 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:27,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224885971] [2021-11-12 22:59:27,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224885971] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:59:27,491 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:59:27,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:59:27,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546399021] [2021-11-12 22:59:27,492 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:27,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:59:27,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:27,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:59:27,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:59:27,498 INFO L87 Difference]: Start difference. First operand 554 states and 886 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, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:59:27,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:27,697 INFO L93 Difference]: Finished difference Result 1080 states and 1744 transitions. [2021-11-12 22:59:27,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:59:27,698 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, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 147 [2021-11-12 22:59:27,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:27,702 INFO L225 Difference]: With dead ends: 1080 [2021-11-12 22:59:27,703 INFO L226 Difference]: Without dead ends: 551 [2021-11-12 22:59:27,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:59:27,706 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 191 mSDsluCounter, 5005 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 99.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 5845 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.81ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 111.67ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:27,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 5845 Invalid, 113 Unknown, 0 Unchecked, 6.81ms Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 111.67ms Time] [2021-11-12 22:59:27,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-11-12 22:59:27,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 551. [2021-11-12 22:59:27,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 428 states have (on average 1.6098130841121496) internal successors, (689), 447 states have internal predecessors, (689), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:59:27,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 878 transitions. [2021-11-12 22:59:27,728 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 878 transitions. Word has length 147 [2021-11-12 22:59:27,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:27,728 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 878 transitions. [2021-11-12 22:59:27,729 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, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:59:27,729 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 878 transitions. [2021-11-12 22:59:27,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-12 22:59:27,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:27,733 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:27,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:27,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:27,956 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:27,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:27,956 INFO L85 PathProgramCache]: Analyzing trace with hash 882904, now seen corresponding path program 1 times [2021-11-12 22:59:27,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:27,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889883922] [2021-11-12 22:59:27,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:27,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:27,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:27,957 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:27,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:59:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:28,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:59:28,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:28,764 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:59:28,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:59:29,290 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:29,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889883922] [2021-11-12 22:59:29,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889883922] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:59:29,290 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:59:29,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:59:29,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389939231] [2021-11-12 22:59:29,291 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:29,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:59:29,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:29,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:59:29,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:59:29,292 INFO L87 Difference]: Start difference. First operand 551 states and 878 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, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:59:29,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:29,492 INFO L93 Difference]: Finished difference Result 1027 states and 1667 transitions. [2021-11-12 22:59:29,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:59:29,495 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, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 148 [2021-11-12 22:59:29,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:29,500 INFO L225 Difference]: With dead ends: 1027 [2021-11-12 22:59:29,500 INFO L226 Difference]: Without dead ends: 551 [2021-11-12 22:59:29,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:59:29,503 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 68 mSDsluCounter, 7499 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 129.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 8340 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.65ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 145.34ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:29,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 8340 Invalid, 156 Unknown, 0 Unchecked, 8.65ms Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 145.34ms Time] [2021-11-12 22:59:29,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-11-12 22:59:29,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 551. [2021-11-12 22:59:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 428 states have (on average 1.6074766355140186) internal successors, (688), 447 states have internal predecessors, (688), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:59:29,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 877 transitions. [2021-11-12 22:59:29,523 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 877 transitions. Word has length 148 [2021-11-12 22:59:29,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:29,524 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 877 transitions. [2021-11-12 22:59:29,524 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, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:59:29,524 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 877 transitions. [2021-11-12 22:59:29,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-12 22:59:29,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:29,529 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:29,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:29,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:29,744 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:29,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:29,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1050970516, now seen corresponding path program 1 times [2021-11-12 22:59:29,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:29,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384506311] [2021-11-12 22:59:29,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:29,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:29,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:29,747 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:29,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:59:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:30,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:59:30,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:59:30,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:59:31,051 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:31,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384506311] [2021-11-12 22:59:31,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384506311] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:59:31,051 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:59:31,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:59:31,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243929296] [2021-11-12 22:59:31,052 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:31,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:59:31,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:31,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:59:31,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:59:31,053 INFO L87 Difference]: Start difference. First operand 551 states and 877 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, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:59:31,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:31,231 INFO L93 Difference]: Finished difference Result 1065 states and 1712 transitions. [2021-11-12 22:59:31,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:59:31,233 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, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 149 [2021-11-12 22:59:31,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:31,237 INFO L225 Difference]: With dead ends: 1065 [2021-11-12 22:59:31,237 INFO L226 Difference]: Without dead ends: 548 [2021-11-12 22:59:31,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:59:31,240 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 96 mSDsluCounter, 5812 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 99.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 6651 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.10ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 113.32ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:31,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 6651 Invalid, 119 Unknown, 0 Unchecked, 8.10ms Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 113.32ms Time] [2021-11-12 22:59:31,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-11-12 22:59:31,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2021-11-12 22:59:31,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 425 states have (on average 1.6) internal successors, (680), 444 states have internal predecessors, (680), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-12 22:59:31,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 869 transitions. [2021-11-12 22:59:31,260 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 869 transitions. Word has length 149 [2021-11-12 22:59:31,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:31,260 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 869 transitions. [2021-11-12 22:59:31,261 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, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:59:31,261 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 869 transitions. [2021-11-12 22:59:31,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-12 22:59:31,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:31,265 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:31,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:31,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:31,485 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:31,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:31,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1865968669, now seen corresponding path program 1 times [2021-11-12 22:59:31,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:31,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050932913] [2021-11-12 22:59:31,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:31,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:31,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:31,488 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:31,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:59:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:31,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:59:31,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:59:32,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:59:32,864 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:32,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050932913] [2021-11-12 22:59:32,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050932913] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:59:32,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:59:32,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:59:32,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220160870] [2021-11-12 22:59:32,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:32,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:59:32,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:32,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:59:32,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:59:32,865 INFO L87 Difference]: Start difference. First operand 548 states and 869 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:59:34,884 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:36,889 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:37,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:37,760 INFO L93 Difference]: Finished difference Result 1020 states and 1676 transitions. [2021-11-12 22:59:37,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:59:37,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 150 [2021-11-12 22:59:37,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:37,765 INFO L225 Difference]: With dead ends: 1020 [2021-11-12 22:59:37,765 INFO L226 Difference]: Without dead ends: 552 [2021-11-12 22:59:37,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:59:37,769 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 785 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4714.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 2129 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.42ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4827.13ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:37,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 2129 Invalid, 441 Unknown, 0 Unchecked, 15.42ms Time], IncrementalHoareTripleChecker [16 Valid, 423 Invalid, 2 Unknown, 0 Unchecked, 4827.13ms Time] [2021-11-12 22:59:37,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-12 22:59:37,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2021-11-12 22:59:37,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 428 states have (on average 1.5957943925233644) internal successors, (683), 447 states have internal predecessors, (683), 97 states have call successors, (97), 27 states have call predecessors, (97), 26 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2021-11-12 22:59:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 873 transitions. [2021-11-12 22:59:37,792 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 873 transitions. Word has length 150 [2021-11-12 22:59:37,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:37,792 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 873 transitions. [2021-11-12 22:59:37,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:59:37,793 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 873 transitions. [2021-11-12 22:59:37,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-12 22:59:37,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:37,797 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:37,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:38,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:38,012 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:38,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:38,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1411770203, now seen corresponding path program 1 times [2021-11-12 22:59:38,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:38,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816492236] [2021-11-12 22:59:38,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:38,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:38,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:38,014 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:38,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:59:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:38,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:59:38,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:59:38,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:59:39,547 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:39,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816492236] [2021-11-12 22:59:39,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816492236] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:59:39,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:59:39,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:59:39,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609270421] [2021-11-12 22:59:39,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:39,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:59:39,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:39,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:59:39,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:59:39,550 INFO L87 Difference]: Start difference. First operand 552 states and 873 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:59:41,579 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:43,584 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:44,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:44,412 INFO L93 Difference]: Finished difference Result 1029 states and 1683 transitions. [2021-11-12 22:59:44,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:59:44,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 152 [2021-11-12 22:59:44,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:44,418 INFO L225 Difference]: With dead ends: 1029 [2021-11-12 22:59:44,418 INFO L226 Difference]: Without dead ends: 557 [2021-11-12 22:59:44,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:59:44,422 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 783 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4700.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 2130 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.59ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4805.52ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:44,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [800 Valid, 2130 Invalid, 443 Unknown, 0 Unchecked, 7.59ms Time], IncrementalHoareTripleChecker [14 Valid, 427 Invalid, 2 Unknown, 0 Unchecked, 4805.52ms Time] [2021-11-12 22:59:44,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-12 22:59:44,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2021-11-12 22:59:44,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 432 states have (on average 1.5902777777777777) internal successors, (687), 451 states have internal predecessors, (687), 97 states have call successors, (97), 28 states have call predecessors, (97), 27 states have return successors, (94), 90 states have call predecessors, (94), 92 states have call successors, (94) [2021-11-12 22:59:44,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 878 transitions. [2021-11-12 22:59:44,445 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 878 transitions. Word has length 152 [2021-11-12 22:59:44,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:44,445 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 878 transitions. [2021-11-12 22:59:44,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:59:44,446 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 878 transitions. [2021-11-12 22:59:44,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-12 22:59:44,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:44,450 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:44,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:44,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:44,664 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:44,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:44,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1072752355, now seen corresponding path program 1 times [2021-11-12 22:59:44,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:44,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309738918] [2021-11-12 22:59:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:44,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:44,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:44,666 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:44,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 22:59:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:45,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:59:45,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:59:45,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:59:45,960 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:45,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309738918] [2021-11-12 22:59:45,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309738918] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:59:45,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:59:45,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:59:45,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858799311] [2021-11-12 22:59:45,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:45,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:59:45,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:45,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:59:45,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:59:45,963 INFO L87 Difference]: Start difference. First operand 557 states and 878 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:59:47,988 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:49,994 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:50,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:50,774 INFO L93 Difference]: Finished difference Result 1040 states and 1692 transitions. [2021-11-12 22:59:50,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:59:50,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 154 [2021-11-12 22:59:50,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:50,780 INFO L225 Difference]: With dead ends: 1040 [2021-11-12 22:59:50,780 INFO L226 Difference]: Without dead ends: 563 [2021-11-12 22:59:50,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:59:50,783 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 783 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4645.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 2130 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.28ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4765.02ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:50,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [800 Valid, 2130 Invalid, 442 Unknown, 0 Unchecked, 6.28ms Time], IncrementalHoareTripleChecker [12 Valid, 428 Invalid, 2 Unknown, 0 Unchecked, 4765.02ms Time] [2021-11-12 22:59:50,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-12 22:59:50,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2021-11-12 22:59:50,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 437 states have (on average 1.5835240274599542) internal successors, (692), 456 states have internal predecessors, (692), 97 states have call successors, (97), 29 states have call predecessors, (97), 28 states have return successors, (95), 90 states have call predecessors, (95), 92 states have call successors, (95) [2021-11-12 22:59:50,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 884 transitions. [2021-11-12 22:59:50,805 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 884 transitions. Word has length 154 [2021-11-12 22:59:50,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:50,806 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 884 transitions. [2021-11-12 22:59:50,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:59:50,806 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 884 transitions. [2021-11-12 22:59:50,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 22:59:50,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:50,810 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:50,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:51,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:51,024 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:51,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:51,024 INFO L85 PathProgramCache]: Analyzing trace with hash -965478115, now seen corresponding path program 1 times [2021-11-12 22:59:51,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:51,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566789521] [2021-11-12 22:59:51,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:51,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:51,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:51,026 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:51,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 22:59:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:51,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:59:51,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:59:51,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 22:59:52,460 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:52,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566789521] [2021-11-12 22:59:52,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566789521] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:59:52,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:59:52,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:59:52,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993874883] [2021-11-12 22:59:52,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:52,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:59:52,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:52,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:59:52,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:59:52,463 INFO L87 Difference]: Start difference. First operand 563 states and 884 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:59:54,490 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:56,496 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:57,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:57,167 INFO L93 Difference]: Finished difference Result 1053 states and 1703 transitions. [2021-11-12 22:59:57,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:59:57,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 156 [2021-11-12 22:59:57,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:57,171 INFO L225 Difference]: With dead ends: 1053 [2021-11-12 22:59:57,171 INFO L226 Difference]: Without dead ends: 570 [2021-11-12 22:59:57,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:59:57,173 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 775 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4559.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 2130 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.41ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4664.65ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:57,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 2130 Invalid, 441 Unknown, 0 Unchecked, 4.41ms Time], IncrementalHoareTripleChecker [10 Valid, 429 Invalid, 2 Unknown, 0 Unchecked, 4664.65ms Time] [2021-11-12 22:59:57,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-12 22:59:57,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2021-11-12 22:59:57,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 443 states have (on average 1.5756207674943568) internal successors, (698), 462 states have internal predecessors, (698), 97 states have call successors, (97), 30 states have call predecessors, (97), 29 states have return successors, (96), 90 states have call predecessors, (96), 92 states have call successors, (96) [2021-11-12 22:59:57,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 891 transitions. [2021-11-12 22:59:57,195 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 891 transitions. Word has length 156 [2021-11-12 22:59:57,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:57,196 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 891 transitions. [2021-11-12 22:59:57,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:59:57,196 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 891 transitions. [2021-11-12 22:59:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-12 22:59:57,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:57,200 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:57,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:57,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:57,416 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:57,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:57,416 INFO L85 PathProgramCache]: Analyzing trace with hash 456057885, now seen corresponding path program 1 times [2021-11-12 22:59:57,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:57,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027315998] [2021-11-12 22:59:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:57,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:57,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:57,440 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:57,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 22:59:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:57,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 22:59:57,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:59:58,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 22:59:59,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:59,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027315998] [2021-11-12 22:59:59,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027315998] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:59:59,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1232880537] [2021-11-12 22:59:59,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:59,508 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:59:59,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:59:59,510 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:59:59,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-12 23:00:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:00,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:00:00,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 23:00:00,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 23:00:01,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1232880537] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:00:01,359 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:00:01,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 23:00:01,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751063595] [2021-11-12 23:00:01,360 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:01,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:00:01,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:01,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:00:01,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:00:01,361 INFO L87 Difference]: Start difference. First operand 570 states and 891 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:00:03,388 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:03,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:03,981 INFO L93 Difference]: Finished difference Result 1056 states and 1689 transitions. [2021-11-12 23:00:03,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:00:03,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 158 [2021-11-12 23:00:03,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:03,987 INFO L225 Difference]: With dead ends: 1056 [2021-11-12 23:00:03,987 INFO L226 Difference]: Without dead ends: 566 [2021-11-12 23:00:03,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 610 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:00:03,990 INFO L933 BasicCegarLoop]: 755 mSDtfsCounter, 1268 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 350 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2468.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.00ms SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2568.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:03,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1268 Valid, 769 Invalid, 449 Unknown, 0 Unchecked, 4.00ms Time], IncrementalHoareTripleChecker [350 Valid, 98 Invalid, 1 Unknown, 0 Unchecked, 2568.78ms Time] [2021-11-12 23:00:03,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-12 23:00:04,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2021-11-12 23:00:04,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 441 states have (on average 1.5714285714285714) internal successors, (693), 459 states have internal predecessors, (693), 95 states have call successors, (95), 30 states have call predecessors, (95), 29 states have return successors, (95), 89 states have call predecessors, (95), 91 states have call successors, (95) [2021-11-12 23:00:04,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 883 transitions. [2021-11-12 23:00:04,015 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 883 transitions. Word has length 158 [2021-11-12 23:00:04,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:04,016 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 883 transitions. [2021-11-12 23:00:04,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:00:04,017 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 883 transitions. [2021-11-12 23:00:04,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-12 23:00:04,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:04,020 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:00:04,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:04,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-12 23:00:04,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:04,423 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:04,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:04,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1252752268, now seen corresponding path program 1 times [2021-11-12 23:00:04,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:04,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1630835608] [2021-11-12 23:00:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:04,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:04,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:04,427 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:04,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:00:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:04,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:00:04,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:00:05,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:00:06,429 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:06,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1630835608] [2021-11-12 23:00:06,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1630835608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:00:06,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [16153402] [2021-11-12 23:00:06,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:06,429 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:00:06,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:00:06,430 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:00:06,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-12 23:00:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:06,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:00:06,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:00:07,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:00:08,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [16153402] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:00:08,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884712161] [2021-11-12 23:00:08,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:08,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:00:08,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:00:08,141 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:00:08,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-12 23:00:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:08,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:00:08,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:00:08,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:00:09,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884712161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:00:09,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:00:09,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-12 23:00:09,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682110138] [2021-11-12 23:00:09,736 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:00:09,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:00:09,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:09,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:00:09,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:00:09,738 INFO L87 Difference]: Start difference. First operand 566 states and 883 transitions. Second operand has 18 states, 18 states have (on average 10.61111111111111) internal successors, (191), 14 states have internal predecessors, (191), 8 states have call successors, (31), 5 states have call predecessors, (31), 10 states have return successors, (32), 12 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 23:00:11,757 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:13,762 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:15,767 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:17,772 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:19,778 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:29,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:29,748 INFO L93 Difference]: Finished difference Result 1803 states and 2936 transitions. [2021-11-12 23:00:29,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:00:29,750 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.61111111111111) internal successors, (191), 14 states have internal predecessors, (191), 8 states have call successors, (31), 5 states have call predecessors, (31), 10 states have return successors, (32), 12 states have call predecessors, (32), 7 states have call successors, (32) Word has length 159 [2021-11-12 23:00:29,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:29,757 INFO L225 Difference]: With dead ends: 1803 [2021-11-12 23:00:29,757 INFO L226 Difference]: Without dead ends: 1317 [2021-11-12 23:00:29,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 934 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:00:29,760 INFO L933 BasicCegarLoop]: 1675 mSDtfsCounter, 4856 mSDsluCounter, 5497 mSDsCounter, 0 mSdLazyCounter, 10107 mSolverCounterSat, 1770 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18345.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4931 SdHoareTripleChecker+Valid, 7172 SdHoareTripleChecker+Invalid, 11882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 76.36ms SdHoareTripleChecker+Time, 1770 IncrementalHoareTripleChecker+Valid, 10107 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19586.45ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:29,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4931 Valid, 7172 Invalid, 11882 Unknown, 0 Unchecked, 76.36ms Time], IncrementalHoareTripleChecker [1770 Valid, 10107 Invalid, 5 Unknown, 0 Unchecked, 19586.45ms Time] [2021-11-12 23:00:29,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-11-12 23:00:29,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1167. [2021-11-12 23:00:29,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 888 states have (on average 1.5934684684684686) internal successors, (1415), 927 states have internal predecessors, (1415), 219 states have call successors, (219), 53 states have call predecessors, (219), 59 states have return successors, (242), 217 states have call predecessors, (242), 215 states have call successors, (242) [2021-11-12 23:00:29,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1876 transitions. [2021-11-12 23:00:29,829 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1876 transitions. Word has length 159 [2021-11-12 23:00:29,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:29,830 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 1876 transitions. [2021-11-12 23:00:29,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.61111111111111) internal successors, (191), 14 states have internal predecessors, (191), 8 states have call successors, (31), 5 states have call predecessors, (31), 10 states have return successors, (32), 12 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 23:00:29,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1876 transitions. [2021-11-12 23:00:29,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-12 23:00:29,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:29,835 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:00:29,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:30,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-12 23:00:30,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:30,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:00:30,452 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:30,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:30,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1078948327, now seen corresponding path program 1 times [2021-11-12 23:00:30,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:30,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183687771] [2021-11-12 23:00:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:30,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:30,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:30,454 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:30,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 23:00:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:30,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:00:30,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:00:31,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:00:31,751 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:31,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183687771] [2021-11-12 23:00:31,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183687771] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:00:31,752 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:00:31,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-12 23:00:31,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113285050] [2021-11-12 23:00:31,752 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:31,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:00:31,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:31,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:00:31,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:00:31,753 INFO L87 Difference]: Start difference. First operand 1167 states and 1876 transitions. Second operand has 10 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 23:00:31,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:31,936 INFO L93 Difference]: Finished difference Result 1656 states and 2670 transitions. [2021-11-12 23:00:31,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:00:31,938 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 161 [2021-11-12 23:00:31,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:31,942 INFO L225 Difference]: With dead ends: 1656 [2021-11-12 23:00:31,943 INFO L226 Difference]: Without dead ends: 559 [2021-11-12 23:00:31,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:00:31,949 INFO L933 BasicCegarLoop]: 822 mSDtfsCounter, 112 mSDsluCounter, 4876 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 5698 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.04ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 113.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:31,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 5698 Invalid, 98 Unknown, 0 Unchecked, 6.04ms Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 113.17ms Time] [2021-11-12 23:00:31,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-12 23:00:31,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-12 23:00:31,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 436 states have (on average 1.56651376146789) internal successors, (683), 454 states have internal predecessors, (683), 93 states have call successors, (93), 30 states have call predecessors, (93), 29 states have return successors, (93), 87 states have call predecessors, (93), 89 states have call successors, (93) [2021-11-12 23:00:31,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 869 transitions. [2021-11-12 23:00:31,969 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 869 transitions. Word has length 161 [2021-11-12 23:00:31,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:31,970 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 869 transitions. [2021-11-12 23:00:31,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 23:00:31,970 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 869 transitions. [2021-11-12 23:00:31,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-12 23:00:31,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:31,973 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:00:32,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:32,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:32,196 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:32,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:32,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1308062692, now seen corresponding path program 1 times [2021-11-12 23:00:32,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:32,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917231999] [2021-11-12 23:00:32,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:32,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:32,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:32,197 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:32,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 23:00:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:32,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:00:32,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:00:33,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:00:34,064 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:34,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917231999] [2021-11-12 23:00:34,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1917231999] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:00:34,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [138197048] [2021-11-12 23:00:34,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:34,064 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:00:34,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:00:34,072 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:00:34,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-12 23:00:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:34,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:00:34,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:00:34,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:00:35,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [138197048] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:00:35,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513197856] [2021-11-12 23:00:35,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:35,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:00:35,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:00:35,753 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:00:35,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-12 23:00:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:36,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:00:36,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:00:36,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:00:37,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513197856] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:00:37,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:00:37,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-12 23:00:37,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774584247] [2021-11-12 23:00:37,277 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:00:37,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:00:37,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:37,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:00:37,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:00:37,279 INFO L87 Difference]: Start difference. First operand 559 states and 869 transitions. Second operand has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 12 states have internal predecessors, (191), 8 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 23:00:39,317 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:41,321 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:43,326 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:45,333 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:47,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:47,775 INFO L93 Difference]: Finished difference Result 1046 states and 1668 transitions. [2021-11-12 23:00:47,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:00:47,776 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 12 states have internal predecessors, (191), 8 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) Word has length 165 [2021-11-12 23:00:47,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:47,779 INFO L225 Difference]: With dead ends: 1046 [2021-11-12 23:00:47,779 INFO L226 Difference]: Without dead ends: 565 [2021-11-12 23:00:47,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 974 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:00:47,781 INFO L933 BasicCegarLoop]: 742 mSDtfsCounter, 1300 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 2782 mSolverCounterSat, 358 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10049.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 2245 SdHoareTripleChecker+Invalid, 3144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.94ms SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 2782 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10383.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:47,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1300 Valid, 2245 Invalid, 3144 Unknown, 0 Unchecked, 12.94ms Time], IncrementalHoareTripleChecker [358 Valid, 2782 Invalid, 4 Unknown, 0 Unchecked, 10383.37ms Time] [2021-11-12 23:00:47,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-12 23:00:47,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 563. [2021-11-12 23:00:47,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 439 states have (on average 1.5626423690205011) internal successors, (686), 457 states have internal predecessors, (686), 93 states have call successors, (93), 30 states have call predecessors, (93), 30 states have return successors, (98), 88 states have call predecessors, (98), 89 states have call successors, (98) [2021-11-12 23:00:47,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 877 transitions. [2021-11-12 23:00:47,813 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 877 transitions. Word has length 165 [2021-11-12 23:00:47,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:47,813 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 877 transitions. [2021-11-12 23:00:47,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 12 states have internal predecessors, (191), 8 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 23:00:47,814 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 877 transitions. [2021-11-12 23:00:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-12 23:00:47,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:47,816 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:00:47,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-12 23:00:48,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:48,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-11-12 23:00:48,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:00:48,420 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:48,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:48,421 INFO L85 PathProgramCache]: Analyzing trace with hash -116940638, now seen corresponding path program 1 times [2021-11-12 23:00:48,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:48,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516681282] [2021-11-12 23:00:48,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:48,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:48,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:48,422 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:48,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-12 23:00:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:48,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:00:48,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:00:49,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:00:49,814 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:49,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516681282] [2021-11-12 23:00:49,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516681282] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:00:49,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1619140645] [2021-11-12 23:00:49,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:49,814 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:00:49,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:00:49,815 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:00:49,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-12 23:00:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:50,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:00:50,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:00:50,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:00:51,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1619140645] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:00:51,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564001908] [2021-11-12 23:00:51,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:51,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:00:51,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:00:51,007 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:00:51,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-12 23:00:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:51,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:00:51,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:00:51,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:00:52,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564001908] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:00:52,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:00:52,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-12 23:00:52,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695317047] [2021-11-12 23:00:52,192 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:00:52,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:00:52,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:52,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:00:52,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:00:52,193 INFO L87 Difference]: Start difference. First operand 563 states and 877 transitions. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-12 23:00:54,212 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:56,218 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:01,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:01:01,544 INFO L93 Difference]: Finished difference Result 2011 states and 3253 transitions. [2021-11-12 23:01:01,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:01:01,546 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) Word has length 166 [2021-11-12 23:01:01,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:01:01,554 INFO L225 Difference]: With dead ends: 2011 [2021-11-12 23:01:01,554 INFO L226 Difference]: Without dead ends: 1526 [2021-11-12 23:01:01,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 990 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:01:01,557 INFO L933 BasicCegarLoop]: 1324 mSDtfsCounter, 5408 mSDsluCounter, 1883 mSDsCounter, 0 mSdLazyCounter, 4561 mSolverCounterSat, 1563 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8313.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5487 SdHoareTripleChecker+Valid, 3207 SdHoareTripleChecker+Invalid, 6126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.57ms SdHoareTripleChecker+Time, 1563 IncrementalHoareTripleChecker+Valid, 4561 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9046.25ms IncrementalHoareTripleChecker+Time [2021-11-12 23:01:01,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5487 Valid, 3207 Invalid, 6126 Unknown, 0 Unchecked, 32.57ms Time], IncrementalHoareTripleChecker [1563 Valid, 4561 Invalid, 2 Unknown, 0 Unchecked, 9046.25ms Time] [2021-11-12 23:01:01,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-11-12 23:01:01,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1468. [2021-11-12 23:01:01,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1137 states have (on average 1.586631486367634) internal successors, (1804), 1182 states have internal predecessors, (1804), 253 states have call successors, (253), 77 states have call predecessors, (253), 77 states have return successors, (282), 245 states have call predecessors, (282), 249 states have call successors, (282) [2021-11-12 23:01:01,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 2339 transitions. [2021-11-12 23:01:01,642 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 2339 transitions. Word has length 166 [2021-11-12 23:01:01,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:01:01,643 INFO L470 AbstractCegarLoop]: Abstraction has 1468 states and 2339 transitions. [2021-11-12 23:01:01,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-12 23:01:01,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 2339 transitions. [2021-11-12 23:01:01,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-12 23:01:01,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:01:01,645 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:01:01,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-12 23:01:01,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-12 23:01:02,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-12 23:01:02,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:01:02,246 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:01:02,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:01:02,246 INFO L85 PathProgramCache]: Analyzing trace with hash 204526218, now seen corresponding path program 1 times [2021-11-12 23:01:02,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:01:02,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337890422] [2021-11-12 23:01:02,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:02,247 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:01:02,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:01:02,248 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:01:02,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-12 23:01:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:02,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:01:02,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:03,245 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:01:03,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:03,789 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:01:03,789 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:01:03,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337890422] [2021-11-12 23:01:03,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337890422] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:01:03,790 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:01:03,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 23:01:03,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336225802] [2021-11-12 23:01:03,790 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:01:03,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:01:03,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:01:03,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:01:03,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:01:03,791 INFO L87 Difference]: Start difference. First operand 1468 states and 2339 transitions. Second operand has 12 states, 12 states have (on average 16.75) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-12 23:01:05,810 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:07,817 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:09,822 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:11,827 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:13,834 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:20,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:01:20,939 INFO L93 Difference]: Finished difference Result 5224 states and 8634 transitions. [2021-11-12 23:01:20,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:01:20,940 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 16.75) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) Word has length 168 [2021-11-12 23:01:20,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:01:20,965 INFO L225 Difference]: With dead ends: 5224 [2021-11-12 23:01:20,965 INFO L226 Difference]: Without dead ends: 3834 [2021-11-12 23:01:20,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:01:20,974 INFO L933 BasicCegarLoop]: 1652 mSDtfsCounter, 2324 mSDsluCounter, 3231 mSDsCounter, 0 mSdLazyCounter, 7064 mSolverCounterSat, 856 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15855.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2422 SdHoareTripleChecker+Valid, 4883 SdHoareTripleChecker+Invalid, 7925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.78ms SdHoareTripleChecker+Time, 856 IncrementalHoareTripleChecker+Valid, 7064 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16774.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:01:20,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2422 Valid, 4883 Invalid, 7925 Unknown, 0 Unchecked, 34.78ms Time], IncrementalHoareTripleChecker [856 Valid, 7064 Invalid, 5 Unknown, 0 Unchecked, 16774.37ms Time] [2021-11-12 23:01:20,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2021-11-12 23:01:21,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 3380. [2021-11-12 23:01:21,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3380 states, 2504 states have (on average 1.58426517571885) internal successors, (3967), 2645 states have internal predecessors, (3967), 716 states have call successors, (716), 146 states have call predecessors, (716), 159 states have return successors, (838), 710 states have call predecessors, (838), 712 states have call successors, (838) [2021-11-12 23:01:21,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3380 states to 3380 states and 5521 transitions. [2021-11-12 23:01:21,266 INFO L78 Accepts]: Start accepts. Automaton has 3380 states and 5521 transitions. Word has length 168 [2021-11-12 23:01:21,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:01:21,267 INFO L470 AbstractCegarLoop]: Abstraction has 3380 states and 5521 transitions. [2021-11-12 23:01:21,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.75) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-12 23:01:21,267 INFO L276 IsEmpty]: Start isEmpty. Operand 3380 states and 5521 transitions. [2021-11-12 23:01:21,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-12 23:01:21,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:01:21,271 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:01:21,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-12 23:01:21,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:01:21,490 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:01:21,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:01:21,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1970153879, now seen corresponding path program 1 times [2021-11-12 23:01:21,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:01:21,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740694987] [2021-11-12 23:01:21,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:21,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:01:21,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:01:21,493 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:01:21,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-12 23:01:21,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:22,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:01:22,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:01:22,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:01:23,037 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:01:23,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740694987] [2021-11-12 23:01:23,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740694987] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:01:23,037 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:01:23,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 23:01:23,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417110507] [2021-11-12 23:01:23,038 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:01:23,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:01:23,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:01:23,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:01:23,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:01:23,039 INFO L87 Difference]: Start difference. First operand 3380 states and 5521 transitions. Second operand has 12 states, 12 states have (on average 13.75) internal successors, (165), 12 states have internal predecessors, (165), 8 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2021-11-12 23:01:25,058 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:27,064 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:32,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:01:32,780 INFO L93 Difference]: Finished difference Result 9368 states and 15397 transitions. [2021-11-12 23:01:32,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:01:32,780 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.75) internal successors, (165), 12 states have internal predecessors, (165), 8 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) Word has length 168 [2021-11-12 23:01:32,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:01:32,840 INFO L225 Difference]: With dead ends: 9368 [2021-11-12 23:01:32,841 INFO L226 Difference]: Without dead ends: 6859 [2021-11-12 23:01:32,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:01:32,851 INFO L933 BasicCegarLoop]: 1007 mSDtfsCounter, 3192 mSDsluCounter, 2165 mSDsCounter, 0 mSdLazyCounter, 4954 mSolverCounterSat, 672 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8356.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3264 SdHoareTripleChecker+Valid, 3172 SdHoareTripleChecker+Invalid, 5628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.81ms SdHoareTripleChecker+Time, 672 IncrementalHoareTripleChecker+Valid, 4954 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9049.04ms IncrementalHoareTripleChecker+Time [2021-11-12 23:01:32,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3264 Valid, 3172 Invalid, 5628 Unknown, 0 Unchecked, 28.81ms Time], IncrementalHoareTripleChecker [672 Valid, 4954 Invalid, 2 Unknown, 0 Unchecked, 9049.04ms Time] [2021-11-12 23:01:32,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6859 states. [2021-11-12 23:01:33,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6859 to 6577. [2021-11-12 23:01:33,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6577 states, 4905 states have (on average 1.5779816513761469) internal successors, (7740), 5173 states have internal predecessors, (7740), 1330 states have call successors, (1330), 280 states have call predecessors, (1330), 341 states have return successors, (1681), 1325 states have call predecessors, (1681), 1326 states have call successors, (1681) [2021-11-12 23:01:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6577 states to 6577 states and 10751 transitions. [2021-11-12 23:01:33,397 INFO L78 Accepts]: Start accepts. Automaton has 6577 states and 10751 transitions. Word has length 168 [2021-11-12 23:01:33,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:01:33,397 INFO L470 AbstractCegarLoop]: Abstraction has 6577 states and 10751 transitions. [2021-11-12 23:01:33,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.75) internal successors, (165), 12 states have internal predecessors, (165), 8 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2021-11-12 23:01:33,398 INFO L276 IsEmpty]: Start isEmpty. Operand 6577 states and 10751 transitions. [2021-11-12 23:01:33,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-12 23:01:33,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:01:33,401 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:01:33,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-12 23:01:33,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:01:33,696 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:01:33,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:01:33,697 INFO L85 PathProgramCache]: Analyzing trace with hash 303274537, now seen corresponding path program 1 times [2021-11-12 23:01:33,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:01:33,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823757426] [2021-11-12 23:01:33,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:33,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:01:33,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:01:33,699 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:01:33,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-12 23:01:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:34,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:01:34,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:01:34,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:01:35,754 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:01:35,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823757426] [2021-11-12 23:01:35,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823757426] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:01:35,754 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:01:35,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 18 [2021-11-12 23:01:35,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703023401] [2021-11-12 23:01:35,755 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:01:35,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:01:35,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:01:35,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:01:35,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:01:35,756 INFO L87 Difference]: Start difference. First operand 6577 states and 10751 transitions. Second operand has 18 states, 18 states have (on average 10.0) internal successors, (180), 14 states have internal predecessors, (180), 8 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-12 23:01:37,796 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:39,802 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:41,807 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:43,813 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:45,817 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:47,823 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:49,829 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:53,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:01:53,470 INFO L93 Difference]: Finished difference Result 12231 states and 20061 transitions. [2021-11-12 23:01:53,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:01:53,470 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.0) internal successors, (180), 14 states have internal predecessors, (180), 8 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) Word has length 170 [2021-11-12 23:01:53,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:01:53,511 INFO L225 Difference]: With dead ends: 12231 [2021-11-12 23:01:53,511 INFO L226 Difference]: Without dead ends: 6529 [2021-11-12 23:01:53,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:01:53,580 INFO L933 BasicCegarLoop]: 739 mSDtfsCounter, 1523 mSDsluCounter, 2394 mSDsCounter, 0 mSdLazyCounter, 4203 mSolverCounterSat, 368 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16807.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 3133 SdHoareTripleChecker+Invalid, 4578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.65ms SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 4203 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17266.36ms IncrementalHoareTripleChecker+Time [2021-11-12 23:01:53,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 3133 Invalid, 4578 Unknown, 0 Unchecked, 18.65ms Time], IncrementalHoareTripleChecker [368 Valid, 4203 Invalid, 7 Unknown, 0 Unchecked, 17266.36ms Time] [2021-11-12 23:01:53,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6529 states. [2021-11-12 23:01:54,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6529 to 6529. [2021-11-12 23:01:54,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6529 states, 4879 states have (on average 1.5781922525107603) internal successors, (7700), 5143 states have internal predecessors, (7700), 1316 states have call successors, (1316), 276 states have call predecessors, (1316), 333 states have return successors, (1659), 1311 states have call predecessors, (1659), 1312 states have call successors, (1659) [2021-11-12 23:01:54,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6529 states to 6529 states and 10675 transitions. [2021-11-12 23:01:54,134 INFO L78 Accepts]: Start accepts. Automaton has 6529 states and 10675 transitions. Word has length 170 [2021-11-12 23:01:54,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:01:54,135 INFO L470 AbstractCegarLoop]: Abstraction has 6529 states and 10675 transitions. [2021-11-12 23:01:54,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.0) internal successors, (180), 14 states have internal predecessors, (180), 8 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-12 23:01:54,135 INFO L276 IsEmpty]: Start isEmpty. Operand 6529 states and 10675 transitions. [2021-11-12 23:01:54,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-12 23:01:54,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:01:54,139 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:01:54,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-12 23:01:54,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:01:54,356 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:01:54,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:01:54,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1793341066, now seen corresponding path program 1 times [2021-11-12 23:01:54,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:01:54,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947691412] [2021-11-12 23:01:54,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:54,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:01:54,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:01:54,361 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:01:54,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-12 23:01:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:55,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:01:55,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:01:55,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:01:56,555 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:01:56,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947691412] [2021-11-12 23:01:56,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947691412] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:01:56,556 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:01:56,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-12 23:01:56,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092176423] [2021-11-12 23:01:56,557 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:01:56,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:01:56,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:01:56,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:01:56,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:01:56,559 INFO L87 Difference]: Start difference. First operand 6529 states and 10675 transitions. Second operand has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 7 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (29), 9 states have call predecessors, (29), 6 states have call successors, (29) [2021-11-12 23:01:58,644 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:00,649 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:02,653 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:10,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:02:10,915 INFO L93 Difference]: Finished difference Result 17343 states and 28381 transitions. [2021-11-12 23:02:10,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:02:10,916 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), 7 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (29), 9 states have call predecessors, (29), 6 states have call successors, (29) Word has length 173 [2021-11-12 23:02:10,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:02:10,983 INFO L225 Difference]: With dead ends: 17343 [2021-11-12 23:02:10,984 INFO L226 Difference]: Without dead ends: 11573 [2021-11-12 23:02:11,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:02:11,006 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 3224 mSDsluCounter, 2529 mSDsCounter, 0 mSdLazyCounter, 6966 mSolverCounterSat, 881 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12285.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3299 SdHoareTripleChecker+Valid, 3476 SdHoareTripleChecker+Invalid, 7850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.00ms SdHoareTripleChecker+Time, 881 IncrementalHoareTripleChecker+Valid, 6966 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13252.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:02:11,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3299 Valid, 3476 Invalid, 7850 Unknown, 0 Unchecked, 38.00ms Time], IncrementalHoareTripleChecker [881 Valid, 6966 Invalid, 3 Unknown, 0 Unchecked, 13252.82ms Time] [2021-11-12 23:02:11,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11573 states. [2021-11-12 23:02:11,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11573 to 11489. [2021-11-12 23:02:11,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11489 states, 8539 states have (on average 1.564117578170746) internal successors, (13356), 9010 states have internal predecessors, (13356), 2332 states have call successors, (2332), 517 states have call predecessors, (2332), 617 states have return successors, (2981), 2321 states have call predecessors, (2981), 2328 states have call successors, (2981) [2021-11-12 23:02:11,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11489 states to 11489 states and 18669 transitions. [2021-11-12 23:02:11,793 INFO L78 Accepts]: Start accepts. Automaton has 11489 states and 18669 transitions. Word has length 173 [2021-11-12 23:02:11,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:02:11,794 INFO L470 AbstractCegarLoop]: Abstraction has 11489 states and 18669 transitions. [2021-11-12 23:02:11,794 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), 7 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (29), 9 states have call predecessors, (29), 6 states have call successors, (29) [2021-11-12 23:02:11,794 INFO L276 IsEmpty]: Start isEmpty. Operand 11489 states and 18669 transitions. [2021-11-12 23:02:11,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-12 23:02:11,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:02:11,798 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:02:11,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-12 23:02:12,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:02:12,020 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:02:12,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:02:12,020 INFO L85 PathProgramCache]: Analyzing trace with hash 224135948, now seen corresponding path program 1 times [2021-11-12 23:02:12,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:02:12,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1873116027] [2021-11-12 23:02:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:02:12,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:02:12,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:02:12,023 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:02:12,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-12 23:02:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:02:12,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:02:12,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:02:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:02:12,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:02:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:02:13,343 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:02:13,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1873116027] [2021-11-12 23:02:13,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1873116027] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:02:13,344 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:02:13,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 23:02:13,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204689068] [2021-11-12 23:02:13,344 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:02:13,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:02:13,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:02:13,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:02:13,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:02:13,346 INFO L87 Difference]: Start difference. First operand 11489 states and 18669 transitions. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 6 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-12 23:02:14,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:02:14,152 INFO L93 Difference]: Finished difference Result 22755 states and 37269 transitions. [2021-11-12 23:02:14,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:02:14,152 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 6 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 180 [2021-11-12 23:02:14,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:02:14,223 INFO L225 Difference]: With dead ends: 22755 [2021-11-12 23:02:14,223 INFO L226 Difference]: Without dead ends: 11489 [2021-11-12 23:02:14,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:02:14,264 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 636 mSDsluCounter, 2136 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 128.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 2998 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.00ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 143.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:02:14,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 2998 Invalid, 122 Unknown, 0 Unchecked, 4.00ms Time], IncrementalHoareTripleChecker [58 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 143.14ms Time] [2021-11-12 23:02:14,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11489 states. [2021-11-12 23:02:15,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11489 to 11489. [2021-11-12 23:02:15,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11489 states, 8539 states have (on average 1.5495959714252254) internal successors, (13232), 9010 states have internal predecessors, (13232), 2332 states have call successors, (2332), 517 states have call predecessors, (2332), 617 states have return successors, (2981), 2321 states have call predecessors, (2981), 2328 states have call successors, (2981) [2021-11-12 23:02:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11489 states to 11489 states and 18545 transitions. [2021-11-12 23:02:15,164 INFO L78 Accepts]: Start accepts. Automaton has 11489 states and 18545 transitions. Word has length 180 [2021-11-12 23:02:15,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:02:15,165 INFO L470 AbstractCegarLoop]: Abstraction has 11489 states and 18545 transitions. [2021-11-12 23:02:15,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 6 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-12 23:02:15,166 INFO L276 IsEmpty]: Start isEmpty. Operand 11489 states and 18545 transitions. [2021-11-12 23:02:15,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-12 23:02:15,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:02:15,170 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:02:15,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-12 23:02:15,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:02:15,376 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:02:15,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:02:15,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1726025487, now seen corresponding path program 1 times [2021-11-12 23:02:15,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:02:15,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227082554] [2021-11-12 23:02:15,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:02:15,378 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:02:15,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:02:15,378 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:02:15,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-12 23:02:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:02:15,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:02:15,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:02:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:02:16,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:02:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:02:17,038 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:02:17,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227082554] [2021-11-12 23:02:17,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227082554] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:02:17,039 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:02:17,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-12 23:02:17,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900826907] [2021-11-12 23:02:17,039 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:02:17,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:02:17,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:02:17,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:02:17,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:02:17,041 INFO L87 Difference]: Start difference. First operand 11489 states and 18545 transitions. Second operand has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-12 23:02:19,064 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:21,070 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:25,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:02:25,292 INFO L93 Difference]: Finished difference Result 22984 states and 37271 transitions. [2021-11-12 23:02:25,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:02:25,293 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) Word has length 185 [2021-11-12 23:02:25,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:02:25,359 INFO L225 Difference]: With dead ends: 22984 [2021-11-12 23:02:25,359 INFO L226 Difference]: Without dead ends: 12551 [2021-11-12 23:02:25,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:02:25,396 INFO L933 BasicCegarLoop]: 848 mSDtfsCounter, 3874 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 2816 mSolverCounterSat, 1075 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6717.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3951 SdHoareTripleChecker+Valid, 2010 SdHoareTripleChecker+Invalid, 3893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.46ms SdHoareTripleChecker+Time, 1075 IncrementalHoareTripleChecker+Valid, 2816 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7186.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:02:25,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3951 Valid, 2010 Invalid, 3893 Unknown, 0 Unchecked, 21.46ms Time], IncrementalHoareTripleChecker [1075 Valid, 2816 Invalid, 2 Unknown, 0 Unchecked, 7186.26ms Time] [2021-11-12 23:02:25,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12551 states. [2021-11-12 23:02:26,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12551 to 11853. [2021-11-12 23:02:26,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11853 states, 8811 states have (on average 1.5421632050845533) internal successors, (13588), 9302 states have internal predecessors, (13588), 2370 states have call successors, (2370), 553 states have call predecessors, (2370), 671 states have return successors, (3067), 2357 states have call predecessors, (3067), 2366 states have call successors, (3067) [2021-11-12 23:02:26,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11853 states to 11853 states and 19025 transitions. [2021-11-12 23:02:26,350 INFO L78 Accepts]: Start accepts. Automaton has 11853 states and 19025 transitions. Word has length 185 [2021-11-12 23:02:26,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:02:26,351 INFO L470 AbstractCegarLoop]: Abstraction has 11853 states and 19025 transitions. [2021-11-12 23:02:26,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-12 23:02:26,351 INFO L276 IsEmpty]: Start isEmpty. Operand 11853 states and 19025 transitions. [2021-11-12 23:02:26,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-12 23:02:26,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:02:26,356 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:02:26,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-12 23:02:26,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:02:26,568 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:02:26,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:02:26,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1585619491, now seen corresponding path program 1 times [2021-11-12 23:02:26,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:02:26,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269563835] [2021-11-12 23:02:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:02:26,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:02:26,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:02:26,570 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:02:26,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-12 23:02:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:02:27,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:02:27,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:02:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:02:27,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:02:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:02:28,684 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:02:28,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269563835] [2021-11-12 23:02:28,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269563835] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:02:28,685 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:02:28,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2021-11-12 23:02:28,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876011735] [2021-11-12 23:02:28,685 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:02:28,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 23:02:28,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:02:28,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 23:02:28,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:02:28,686 INFO L87 Difference]: Start difference. First operand 11853 states and 19025 transitions. Second operand has 15 states, 15 states have (on average 12.866666666666667) internal successors, (193), 13 states have internal predecessors, (193), 7 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (33), 11 states have call predecessors, (33), 6 states have call successors, (33) [2021-11-12 23:02:30,705 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:32,710 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:34,716 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:36,721 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:38,726 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:48,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:02:48,737 INFO L93 Difference]: Finished difference Result 31420 states and 52118 transitions. [2021-11-12 23:02:48,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-12 23:02:48,739 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 12.866666666666667) internal successors, (193), 13 states have internal predecessors, (193), 7 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (33), 11 states have call predecessors, (33), 6 states have call successors, (33) Word has length 190 [2021-11-12 23:02:48,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:02:48,874 INFO L225 Difference]: With dead ends: 31420 [2021-11-12 23:02:48,875 INFO L226 Difference]: Without dead ends: 18815 [2021-11-12 23:02:48,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-11-12 23:02:48,964 INFO L933 BasicCegarLoop]: 1146 mSDtfsCounter, 3486 mSDsluCounter, 3850 mSDsCounter, 0 mSdLazyCounter, 7704 mSolverCounterSat, 996 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17420.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3584 SdHoareTripleChecker+Valid, 4996 SdHoareTripleChecker+Invalid, 8705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.48ms SdHoareTripleChecker+Time, 996 IncrementalHoareTripleChecker+Valid, 7704 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18469.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:02:48,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3584 Valid, 4996 Invalid, 8705 Unknown, 0 Unchecked, 42.48ms Time], IncrementalHoareTripleChecker [996 Valid, 7704 Invalid, 5 Unknown, 0 Unchecked, 18469.22ms Time] [2021-11-12 23:02:48,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18815 states. [2021-11-12 23:02:50,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18815 to 17697. [2021-11-12 23:02:50,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17697 states, 13173 states have (on average 1.5341987398466561) internal successors, (20210), 13916 states have internal predecessors, (20210), 3516 states have call successors, (3516), 841 states have call predecessors, (3516), 1007 states have return successors, (4735), 3459 states have call predecessors, (4735), 3512 states have call successors, (4735) [2021-11-12 23:02:50,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17697 states to 17697 states and 28461 transitions. [2021-11-12 23:02:50,658 INFO L78 Accepts]: Start accepts. Automaton has 17697 states and 28461 transitions. Word has length 190 [2021-11-12 23:02:50,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:02:50,659 INFO L470 AbstractCegarLoop]: Abstraction has 17697 states and 28461 transitions. [2021-11-12 23:02:50,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 12.866666666666667) internal successors, (193), 13 states have internal predecessors, (193), 7 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (33), 11 states have call predecessors, (33), 6 states have call successors, (33) [2021-11-12 23:02:50,660 INFO L276 IsEmpty]: Start isEmpty. Operand 17697 states and 28461 transitions. [2021-11-12 23:02:50,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-12 23:02:50,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:02:50,664 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:02:50,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-12 23:02:50,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:02:50,886 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:02:50,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:02:50,886 INFO L85 PathProgramCache]: Analyzing trace with hash 813671321, now seen corresponding path program 1 times [2021-11-12 23:02:50,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:02:50,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064958971] [2021-11-12 23:02:50,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:02:50,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:02:50,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:02:50,889 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:02:50,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-12 23:02:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:02:51,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:02:51,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:02:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-12 23:02:51,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:02:52,654 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-12 23:02:52,654 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:02:52,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064958971] [2021-11-12 23:02:52,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064958971] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:02:52,654 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:02:52,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:02:52,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092096996] [2021-11-12 23:02:52,655 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:02:52,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:02:52,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:02:52,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:02:52,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:02:52,656 INFO L87 Difference]: Start difference. First operand 17697 states and 28461 transitions. Second operand has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 11 states have internal predecessors, (187), 7 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (32), 9 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-12 23:02:54,674 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:56,680 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:04,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:03:04,979 INFO L93 Difference]: Finished difference Result 48000 states and 78069 transitions. [2021-11-12 23:03:04,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:03:04,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 11 states have internal predecessors, (187), 7 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (32), 9 states have call predecessors, (32), 6 states have call successors, (32) Word has length 190 [2021-11-12 23:03:04,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:03:05,188 INFO L225 Difference]: With dead ends: 48000 [2021-11-12 23:03:05,188 INFO L226 Difference]: Without dead ends: 31364 [2021-11-12 23:03:05,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-12 23:03:05,242 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 3603 mSDsluCounter, 2255 mSDsCounter, 0 mSdLazyCounter, 5644 mSolverCounterSat, 1013 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9212.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3675 SdHoareTripleChecker+Valid, 3096 SdHoareTripleChecker+Invalid, 6659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.27ms SdHoareTripleChecker+Time, 1013 IncrementalHoareTripleChecker+Valid, 5644 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9996.13ms IncrementalHoareTripleChecker+Time [2021-11-12 23:03:05,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3675 Valid, 3096 Invalid, 6659 Unknown, 0 Unchecked, 33.27ms Time], IncrementalHoareTripleChecker [1013 Valid, 5644 Invalid, 2 Unknown, 0 Unchecked, 9996.13ms Time] [2021-11-12 23:03:05,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31364 states. [2021-11-12 23:03:07,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31364 to 31212. [2021-11-12 23:03:07,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31212 states, 23128 states have (on average 1.5412054652369422) internal successors, (35645), 24440 states have internal predecessors, (35645), 6370 states have call successors, (6370), 1533 states have call predecessors, (6370), 1713 states have return successors, (8258), 6238 states have call predecessors, (8258), 6366 states have call successors, (8258) [2021-11-12 23:03:07,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31212 states to 31212 states and 50273 transitions. [2021-11-12 23:03:07,715 INFO L78 Accepts]: Start accepts. Automaton has 31212 states and 50273 transitions. Word has length 190 [2021-11-12 23:03:07,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:03:07,715 INFO L470 AbstractCegarLoop]: Abstraction has 31212 states and 50273 transitions. [2021-11-12 23:03:07,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 11 states have internal predecessors, (187), 7 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (32), 9 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-12 23:03:07,716 INFO L276 IsEmpty]: Start isEmpty. Operand 31212 states and 50273 transitions. [2021-11-12 23:03:07,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-12 23:03:07,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:03:07,719 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:03:07,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-12 23:03:07,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:03:07,919 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:03:07,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:03:07,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1835163626, now seen corresponding path program 1 times [2021-11-12 23:03:07,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:03:07,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140060198] [2021-11-12 23:03:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:03:07,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:03:07,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:03:07,921 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:03:07,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-12 23:03:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:03:08,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:03:08,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:03:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 23:03:08,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:03:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 23:03:09,648 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:03:09,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140060198] [2021-11-12 23:03:09,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140060198] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:03:09,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1107698004] [2021-11-12 23:03:09,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:03:09,649 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:03:09,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:03:09,653 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:03:09,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-11-12 23:03:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:03:10,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:03:10,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:03:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:03:10,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:03:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:03:10,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1107698004] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:03:10,863 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:03:10,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-12 23:03:10,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877473462] [2021-11-12 23:03:10,864 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:03:10,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:03:10,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:03:10,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:03:10,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:03:10,865 INFO L87 Difference]: Start difference. First operand 31212 states and 50273 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-12 23:03:14,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:03:14,385 INFO L93 Difference]: Finished difference Result 93016 states and 151127 transitions. [2021-11-12 23:03:14,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:03:14,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 191 [2021-11-12 23:03:14,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:03:15,015 INFO L225 Difference]: With dead ends: 93016 [2021-11-12 23:03:15,015 INFO L226 Difference]: Without dead ends: 61883 [2021-11-12 23:03:15,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 753 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:03:15,129 INFO L933 BasicCegarLoop]: 1409 mSDtfsCounter, 761 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 2189 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.26ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:03:15,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 2189 Invalid, 10 Unknown, 0 Unchecked, 3.26ms Time], IncrementalHoareTripleChecker [5 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 31.64ms Time] [2021-11-12 23:03:15,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61883 states. [2021-11-12 23:03:19,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61883 to 61185. [2021-11-12 23:03:19,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61185 states, 45356 states have (on average 1.5365772995855014) internal successors, (69693), 47928 states have internal predecessors, (69693), 12432 states have call successors, (12432), 3034 states have call predecessors, (12432), 3396 states have return successors, (16838), 12222 states have call predecessors, (16838), 12428 states have call successors, (16838) [2021-11-12 23:03:19,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61185 states to 61185 states and 98963 transitions. [2021-11-12 23:03:19,883 INFO L78 Accepts]: Start accepts. Automaton has 61185 states and 98963 transitions. Word has length 191 [2021-11-12 23:03:19,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:03:19,884 INFO L470 AbstractCegarLoop]: Abstraction has 61185 states and 98963 transitions. [2021-11-12 23:03:19,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-12 23:03:19,884 INFO L276 IsEmpty]: Start isEmpty. Operand 61185 states and 98963 transitions. [2021-11-12 23:03:19,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-12 23:03:19,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:03:19,888 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:03:19,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2021-11-12 23:03:20,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-12 23:03:20,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:03:20,289 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:03:20,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:03:20,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1055361185, now seen corresponding path program 1 times [2021-11-12 23:03:20,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:03:20,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199271752] [2021-11-12 23:03:20,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:03:20,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:03:20,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:03:20,291 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:03:20,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-12 23:03:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:03:20,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:03:20,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:03:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 23:03:21,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:03:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 23:03:21,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:03:21,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199271752] [2021-11-12 23:03:21,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199271752] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:03:21,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [461530438] [2021-11-12 23:03:21,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:03:21,867 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:03:21,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:03:21,868 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:03:21,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-11-12 23:03:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:03:22,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:03:22,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:03:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 23:03:22,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:03:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 23:03:23,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [461530438] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:03:23,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384717733] [2021-11-12 23:03:23,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:03:23,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:03:23,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:03:23,570 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:03:23,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-12 23:03:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:03:23,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:03:23,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:03:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 23:03:24,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:03:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 23:03:24,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384717733] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:03:24,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:03:24,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 4, 5, 5] total 9 [2021-11-12 23:03:24,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148555128] [2021-11-12 23:03:24,849 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:03:24,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:03:24,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:03:24,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:03:24,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:03:24,851 INFO L87 Difference]: Start difference. First operand 61185 states and 98963 transitions. Second operand has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (35), 8 states have call predecessors, (35), 5 states have call successors, (35) [2021-11-12 23:03:26,870 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:33,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:03:33,493 INFO L93 Difference]: Finished difference Result 93638 states and 151332 transitions. [2021-11-12 23:03:33,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:03:33,494 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (35), 8 states have call predecessors, (35), 5 states have call successors, (35) Word has length 192 [2021-11-12 23:03:33,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:03:34,091 INFO L225 Difference]: With dead ends: 93638 [2021-11-12 23:03:34,091 INFO L226 Difference]: Without dead ends: 63657 [2021-11-12 23:03:34,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1149 GetRequests, 1140 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:03:34,205 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 3258 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 884 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4318.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3330 SdHoareTripleChecker+Valid, 1803 SdHoareTripleChecker+Invalid, 3113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.90ms SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4740.80ms IncrementalHoareTripleChecker+Time [2021-11-12 23:03:34,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3330 Valid, 1803 Invalid, 3113 Unknown, 0 Unchecked, 17.90ms Time], IncrementalHoareTripleChecker [884 Valid, 2228 Invalid, 1 Unknown, 0 Unchecked, 4740.80ms Time] [2021-11-12 23:03:34,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63657 states. [2021-11-12 23:03:38,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63657 to 61861. [2021-11-12 23:03:38,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61861 states, 45828 states have (on average 1.5305053678973553) internal successors, (70140), 48564 states have internal predecessors, (70140), 12480 states have call successors, (12480), 3042 states have call predecessors, (12480), 3552 states have return successors, (16794), 12254 states have call predecessors, (16794), 12476 states have call successors, (16794) [2021-11-12 23:03:38,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61861 states to 61861 states and 99414 transitions. [2021-11-12 23:03:38,796 INFO L78 Accepts]: Start accepts. Automaton has 61861 states and 99414 transitions. Word has length 192 [2021-11-12 23:03:38,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:03:38,796 INFO L470 AbstractCegarLoop]: Abstraction has 61861 states and 99414 transitions. [2021-11-12 23:03:38,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (35), 8 states have call predecessors, (35), 5 states have call successors, (35) [2021-11-12 23:03:38,796 INFO L276 IsEmpty]: Start isEmpty. Operand 61861 states and 99414 transitions. [2021-11-12 23:03:38,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-12 23:03:38,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:03:38,799 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:03:38,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2021-11-12 23:03:39,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-12 23:03:39,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-12 23:03:39,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:03:39,404 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:03:39,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:03:39,404 INFO L85 PathProgramCache]: Analyzing trace with hash 544244624, now seen corresponding path program 1 times [2021-11-12 23:03:39,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:03:39,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372607562] [2021-11-12 23:03:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:03:39,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:03:39,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:03:39,407 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:03:39,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a8fbd9e-6e17-4933-8e91-e2782320aa0d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-12 23:03:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:03:39,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:03:39,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:03:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:03:40,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:03:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:03:40,729 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:03:40,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372607562] [2021-11-12 23:03:40,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372607562] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:03:40,730 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:03:40,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 23:03:40,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801184077] [2021-11-12 23:03:40,730 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:03:40,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:03:40,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:03:40,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:03:40,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:03:40,731 INFO L87 Difference]: Start difference. First operand 61861 states and 99414 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 23:03:42,750 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []