./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:39:11,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:39:11,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:39:11,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:39:11,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:39:11,686 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:39:11,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:39:11,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:39:11,695 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:39:11,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:39:11,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:39:11,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:39:11,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:39:11,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:39:11,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:39:11,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:39:11,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:39:11,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:39:11,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:39:11,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:39:11,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:39:11,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:39:11,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:39:11,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:39:11,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:39:11,736 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:39:11,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:39:11,738 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:39:11,739 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:39:11,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:39:11,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:39:11,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:39:11,743 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:39:11,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:39:11,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:39:11,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:39:11,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:39:11,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:39:11,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:39:11,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:39:11,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:39:11,753 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:39:11,787 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:39:11,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:39:11,788 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:39:11,789 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:39:11,789 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:39:11,790 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:39:11,790 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:39:11,791 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:39:11,791 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:39:11,792 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:39:11,792 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:39:11,793 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:39:11,793 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:39:11,794 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:39:11,794 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:39:11,795 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:39:11,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:39:11,796 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:39:11,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:39:11,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:39:11,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:39:11,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:39:11,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:39:11,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:39:11,799 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:39:11,799 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:39:11,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:39:11,800 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:39:11,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:39:11,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:39:11,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:39:11,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:39:11,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:39:11,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:39:11,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:39:11,802 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:39:11,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:39:11,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:39:11,803 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:39:11,803 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:39:11,803 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_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 [2021-11-19 14:39:12,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:39:12,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:39:12,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:39:12,177 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:39:12,178 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:39:12,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2021-11-19 14:39:12,268 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/data/0f5757e52/04badc987ad342f6ad46c455aabbbbb8/FLAGbdb8680f9 [2021-11-19 14:39:13,070 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:39:13,070 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2021-11-19 14:39:13,097 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/data/0f5757e52/04badc987ad342f6ad46c455aabbbbb8/FLAGbdb8680f9 [2021-11-19 14:39:13,236 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/data/0f5757e52/04badc987ad342f6ad46c455aabbbbb8 [2021-11-19 14:39:13,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:39:13,244 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:39:13,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:39:13,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:39:13,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:39:13,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:39:13" (1/1) ... [2021-11-19 14:39:13,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11d9bb17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:13, skipping insertion in model container [2021-11-19 14:39:13,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:39:13" (1/1) ... [2021-11-19 14:39:13,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:39:13,374 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:39:13,891 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2021-11-19 14:39:14,082 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:39:14,095 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:39:14,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@57d5cfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:14, skipping insertion in model container [2021-11-19 14:39:14,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:39:14,097 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:39:14,099 INFO L158 Benchmark]: Toolchain (without parser) took 853.65ms. Allocated memory is still 117.4MB. Free memory was 74.3MB in the beginning and 77.1MB in the end (delta: -2.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:39:14,100 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 117.4MB. Free memory is still 94.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:39:14,101 INFO L158 Benchmark]: CACSL2BoogieTranslator took 848.57ms. Allocated memory is still 117.4MB. Free memory was 74.2MB in the beginning and 77.1MB in the end (delta: -3.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:39:14,103 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 117.4MB. Free memory is still 94.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 848.57ms. Allocated memory is still 117.4MB. Free memory was 74.2MB in the beginning and 77.1MB in the end (delta: -3.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1281]: 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_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:39:16,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:39:16,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:39:16,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:39:16,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:39:16,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:39:16,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:39:16,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:39:16,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:39:16,951 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:39:16,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:39:16,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:39:16,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:39:16,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:39:16,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:39:16,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:39:16,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:39:16,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:39:16,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:39:16,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:39:16,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:39:16,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:39:16,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:39:16,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:39:17,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:39:17,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:39:17,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:39:17,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:39:17,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:39:17,015 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:39:17,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:39:17,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:39:17,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:39:17,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:39:17,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:39:17,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:39:17,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:39:17,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:39:17,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:39:17,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:39:17,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:39:17,035 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:39:17,092 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:39:17,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:39:17,094 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:39:17,095 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:39:17,095 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:39:17,095 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:39:17,096 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:39:17,096 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:39:17,096 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:39:17,096 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:39:17,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:39:17,100 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:39:17,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:39:17,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:39:17,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:39:17,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:39:17,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:39:17,102 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:39:17,102 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:39:17,102 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:39:17,103 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:39:17,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:39:17,103 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:39:17,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:39:17,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:39:17,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:39:17,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:39:17,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:39:17,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:39:17,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:39:17,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:39:17,106 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:39:17,106 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:39:17,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:39:17,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:39:17,108 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:39:17,108 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_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 [2021-11-19 14:39:17,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:39:17,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:39:17,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:39:17,628 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:39:17,629 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:39:17,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2021-11-19 14:39:17,728 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/data/74419c5d9/49244748753743c9b743a29920e64698/FLAG97f1f2baa [2021-11-19 14:39:18,712 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:39:18,713 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2021-11-19 14:39:18,743 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/data/74419c5d9/49244748753743c9b743a29920e64698/FLAG97f1f2baa [2021-11-19 14:39:18,765 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/data/74419c5d9/49244748753743c9b743a29920e64698 [2021-11-19 14:39:18,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:39:18,770 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:39:18,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:39:18,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:39:18,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:39:18,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:39:18" (1/1) ... [2021-11-19 14:39:18,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@476191f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:18, skipping insertion in model container [2021-11-19 14:39:18,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:39:18" (1/1) ... [2021-11-19 14:39:18,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:39:18,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:39:19,536 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2021-11-19 14:39:19,784 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:39:19,808 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:39:19,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:39:19,936 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2021-11-19 14:39:19,997 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:39:20,008 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:39:20,103 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2021-11-19 14:39:20,183 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:39:20,229 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:39:20,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:20 WrapperNode [2021-11-19 14:39:20,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:39:20,232 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:39:20,232 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:39:20,232 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:39:20,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:20" (1/1) ... [2021-11-19 14:39:20,319 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:20" (1/1) ... [2021-11-19 14:39:20,417 INFO L137 Inliner]: procedures = 97, calls = 343, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 1091 [2021-11-19 14:39:20,417 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:39:20,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:39:20,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:39:20,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:39:20,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:20" (1/1) ... [2021-11-19 14:39:20,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:20" (1/1) ... [2021-11-19 14:39:20,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:20" (1/1) ... [2021-11-19 14:39:20,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:20" (1/1) ... [2021-11-19 14:39:20,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:20" (1/1) ... [2021-11-19 14:39:20,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:20" (1/1) ... [2021-11-19 14:39:20,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:20" (1/1) ... [2021-11-19 14:39:20,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:39:20,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:39:20,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:39:20,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:39:20,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:20" (1/1) ... [2021-11-19 14:39:20,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:39:20,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:39:20,623 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:39:20,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:39:20,684 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-19 14:39:20,684 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-19 14:39:20,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:39:20,685 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 14:39:20,685 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 14:39:20,685 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 14:39:20,686 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 14:39:20,686 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:39:20,686 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:39:20,686 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 14:39:20,686 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 14:39:20,687 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:39:20,687 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:39:20,687 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:39:20,687 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:39:20,687 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:39:20,688 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:39:20,688 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:39:20,688 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:39:20,688 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 14:39:20,688 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 14:39:20,689 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 14:39:20,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 14:39:20,689 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:39:20,689 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:39:20,690 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:39:20,690 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:39:20,690 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:39:20,690 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:39:20,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:39:20,691 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 14:39:20,691 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 14:39:20,691 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:39:20,691 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:39:20,691 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 14:39:20,692 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 14:39:20,692 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:39:20,692 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:39:20,692 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:39:20,692 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:39:20,693 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:39:20,693 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:39:20,693 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:39:20,693 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:39:20,694 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:39:20,694 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:39:20,694 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:39:20,694 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:39:20,694 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:39:20,695 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:39:20,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:39:20,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:39:20,695 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:39:20,695 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:39:20,914 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:39:20,925 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:39:22,380 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:39:22,407 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:39:22,408 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:39:22,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:39:22 BoogieIcfgContainer [2021-11-19 14:39:22,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:39:22,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:39:22,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:39:22,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:39:22,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:39:18" (1/3) ... [2021-11-19 14:39:22,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a72918e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:39:22, skipping insertion in model container [2021-11-19 14:39:22,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:39:20" (2/3) ... [2021-11-19 14:39:22,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a72918e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:39:22, skipping insertion in model container [2021-11-19 14:39:22,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:39:22" (3/3) ... [2021-11-19 14:39:22,424 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product27.cil.c [2021-11-19 14:39:22,431 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:39:22,431 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:39:22,518 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:39:22,533 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:39:22,533 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:39:22,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 576 states, 450 states have (on average 1.6866666666666668) internal successors, (759), 471 states have internal predecessors, (759), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-19 14:39:22,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 14:39:22,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:22,638 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] [2021-11-19 14:39:22,638 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:22,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:22,645 INFO L85 PathProgramCache]: Analyzing trace with hash 2046185368, now seen corresponding path program 1 times [2021-11-19 14:39:22,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:22,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98390910] [2021-11-19 14:39:22,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:22,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:22,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:22,667 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:22,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:39:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:23,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:39:23,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 14:39:23,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 14:39:24,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:24,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98390910] [2021-11-19 14:39:24,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98390910] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:39:24,180 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:39:24,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:39:24,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825511407] [2021-11-19 14:39:24,183 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:24,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:39:24,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:24,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:39:24,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:39:24,241 INFO L87 Difference]: Start difference. First operand has 576 states, 450 states have (on average 1.6866666666666668) internal successors, (759), 471 states have internal predecessors, (759), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) 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) [2021-11-19 14:39:24,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:24,357 INFO L93 Difference]: Finished difference Result 597 states and 987 transitions. [2021-11-19 14:39:24,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:39:24,360 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 [2021-11-19 14:39:24,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:24,392 INFO L225 Difference]: With dead ends: 597 [2021-11-19 14:39:24,392 INFO L226 Difference]: Without dead ends: 568 [2021-11-19 14:39:24,398 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 [2021-11-19 14:39:24,402 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:24,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:39:24,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-19 14:39:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-19 14:39:24,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 444 states have (on average 1.6846846846846846) internal successors, (748), 463 states have internal predecessors, (748), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 14:39:24,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 941 transitions. [2021-11-19 14:39:24,620 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 941 transitions. Word has length 125 [2021-11-19 14:39:24,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:24,624 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 941 transitions. [2021-11-19 14:39:24,624 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) [2021-11-19 14:39:24,625 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 941 transitions. [2021-11-19 14:39:24,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 14:39:24,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:24,640 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] [2021-11-19 14:39:24,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:24,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:24,858 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:24,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:24,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1473529241, now seen corresponding path program 1 times [2021-11-19 14:39:24,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:24,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956160369] [2021-11-19 14:39:24,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:24,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:24,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:24,865 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:24,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:39:25,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:25,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:39:25,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:39:25,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:39:26,336 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:26,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956160369] [2021-11-19 14:39:26,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956160369] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:39:26,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:39:26,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:39:26,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201329918] [2021-11-19 14:39:26,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:26,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:39:26,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:26,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:39:26,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:39:26,350 INFO L87 Difference]: Start difference. First operand 568 states and 941 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) [2021-11-19 14:39:26,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:26,518 INFO L93 Difference]: Finished difference Result 1127 states and 1874 transitions. [2021-11-19 14:39:26,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:39:26,519 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 [2021-11-19 14:39:26,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:26,530 INFO L225 Difference]: With dead ends: 1127 [2021-11-19 14:39:26,531 INFO L226 Difference]: Without dead ends: 568 [2021-11-19 14:39:26,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:39:26,543 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 14 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:26,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2774 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:39:26,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-19 14:39:26,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-19 14:39:26,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 444 states have (on average 1.6824324324324325) internal successors, (747), 463 states have internal predecessors, (747), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 14:39:26,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 940 transitions. [2021-11-19 14:39:26,627 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 940 transitions. Word has length 127 [2021-11-19 14:39:26,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:26,629 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 940 transitions. [2021-11-19 14:39:26,629 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) [2021-11-19 14:39:26,629 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 940 transitions. [2021-11-19 14:39:26,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 14:39:26,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:26,647 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] [2021-11-19 14:39:26,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:26,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:26,871 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:26,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:26,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1802520523, now seen corresponding path program 1 times [2021-11-19 14:39:26,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:26,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826867067] [2021-11-19 14:39:26,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:26,874 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:26,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:26,875 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:26,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:39:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:27,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:39:27,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:39:27,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:39:28,216 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:28,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826867067] [2021-11-19 14:39:28,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826867067] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:39:28,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:39:28,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:39:28,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884611853] [2021-11-19 14:39:28,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:28,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:39:28,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:28,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:39:28,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:39:28,227 INFO L87 Difference]: Start difference. First operand 568 states and 940 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) [2021-11-19 14:39:28,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:28,351 INFO L93 Difference]: Finished difference Result 1127 states and 1872 transitions. [2021-11-19 14:39:28,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:39:28,352 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 [2021-11-19 14:39:28,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:28,360 INFO L225 Difference]: With dead ends: 1127 [2021-11-19 14:39:28,360 INFO L226 Difference]: Without dead ends: 568 [2021-11-19 14:39:28,364 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 [2021-11-19 14:39:28,369 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 12 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:28,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2774 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:39:28,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-19 14:39:28,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-19 14:39:28,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 444 states have (on average 1.6801801801801801) internal successors, (746), 463 states have internal predecessors, (746), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 14:39:28,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 939 transitions. [2021-11-19 14:39:28,428 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 939 transitions. Word has length 129 [2021-11-19 14:39:28,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:28,428 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 939 transitions. [2021-11-19 14:39:28,429 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) [2021-11-19 14:39:28,429 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 939 transitions. [2021-11-19 14:39:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 14:39:28,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:28,438 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] [2021-11-19 14:39:28,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:28,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:28,659 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:28,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:28,659 INFO L85 PathProgramCache]: Analyzing trace with hash 33674215, now seen corresponding path program 1 times [2021-11-19 14:39:28,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:28,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207857297] [2021-11-19 14:39:28,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:28,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:28,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:28,669 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:28,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:39:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:29,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:39:29,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:39:29,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:39:29,892 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:29,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207857297] [2021-11-19 14:39:29,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207857297] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:39:29,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:39:29,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:39:29,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986109412] [2021-11-19 14:39:29,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:29,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:39:29,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:29,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:39:29,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:39:29,896 INFO L87 Difference]: Start difference. First operand 568 states and 939 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) [2021-11-19 14:39:29,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:29,995 INFO L93 Difference]: Finished difference Result 1131 states and 1875 transitions. [2021-11-19 14:39:29,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:39:29,996 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 [2021-11-19 14:39:29,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:30,004 INFO L225 Difference]: With dead ends: 1131 [2021-11-19 14:39:30,004 INFO L226 Difference]: Without dead ends: 574 [2021-11-19 14:39:30,010 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 [2021-11-19 14:39:30,017 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 13 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:30,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2774 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:39:30,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-19 14:39:30,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-19 14:39:30,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 449 states have (on average 1.6726057906458798) internal successors, (751), 468 states have internal predecessors, (751), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 14:39:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 944 transitions. [2021-11-19 14:39:30,060 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 944 transitions. Word has length 131 [2021-11-19 14:39:30,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:30,061 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 944 transitions. [2021-11-19 14:39:30,061 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) [2021-11-19 14:39:30,061 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 944 transitions. [2021-11-19 14:39:30,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 14:39:30,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:30,071 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] [2021-11-19 14:39:30,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:30,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:30,295 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:30,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:30,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1047710980, now seen corresponding path program 1 times [2021-11-19 14:39:30,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:30,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338423275] [2021-11-19 14:39:30,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:30,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:30,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:30,298 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:30,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:39:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:30,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:39:30,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:39:31,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:31,690 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:39:31,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:31,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338423275] [2021-11-19 14:39:31,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338423275] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:39:31,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:39:31,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:39:31,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754004760] [2021-11-19 14:39:31,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:31,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:39:31,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:31,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:39:31,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:39:31,694 INFO L87 Difference]: Start difference. First operand 574 states and 944 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) [2021-11-19 14:39:31,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:31,782 INFO L93 Difference]: Finished difference Result 1130 states and 1866 transitions. [2021-11-19 14:39:31,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:39:31,783 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 [2021-11-19 14:39:31,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:31,790 INFO L225 Difference]: With dead ends: 1130 [2021-11-19 14:39:31,790 INFO L226 Difference]: Without dead ends: 574 [2021-11-19 14:39:31,798 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 [2021-11-19 14:39:31,799 INFO L933 BasicCegarLoop]: 928 mSDtfsCounter, 8 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2775 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:31,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2775 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:39:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-19 14:39:31,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-19 14:39:31,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 449 states have (on average 1.670378619153675) internal successors, (750), 468 states have internal predecessors, (750), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 14:39:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 943 transitions. [2021-11-19 14:39:31,851 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 943 transitions. Word has length 132 [2021-11-19 14:39:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:31,852 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 943 transitions. [2021-11-19 14:39:31,852 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) [2021-11-19 14:39:31,852 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 943 transitions. [2021-11-19 14:39:31,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 14:39:31,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:31,859 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] [2021-11-19 14:39:31,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:32,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:32,083 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:32,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:32,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1025925749, now seen corresponding path program 1 times [2021-11-19 14:39:32,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:32,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99036432] [2021-11-19 14:39:32,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:32,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:32,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:32,086 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:32,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:39:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:32,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:39:32,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:39:32,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:39:33,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:33,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99036432] [2021-11-19 14:39:33,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99036432] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:39:33,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:39:33,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:39:33,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039020737] [2021-11-19 14:39:33,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:33,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:39:33,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:33,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:39:33,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:39:33,441 INFO L87 Difference]: Start difference. First operand 574 states and 943 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) [2021-11-19 14:39:33,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:33,530 INFO L93 Difference]: Finished difference Result 1130 states and 1865 transitions. [2021-11-19 14:39:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:39:33,531 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 [2021-11-19 14:39:33,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:33,538 INFO L225 Difference]: With dead ends: 1130 [2021-11-19 14:39:33,538 INFO L226 Difference]: Without dead ends: 574 [2021-11-19 14:39:33,542 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 [2021-11-19 14:39:33,543 INFO L933 BasicCegarLoop]: 928 mSDtfsCounter, 6 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2775 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:33,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2775 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:39:33,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-19 14:39:33,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-19 14:39:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 449 states have (on average 1.6681514476614698) internal successors, (749), 468 states have internal predecessors, (749), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 14:39:33,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 942 transitions. [2021-11-19 14:39:33,607 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 942 transitions. Word has length 133 [2021-11-19 14:39:33,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:33,608 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 942 transitions. [2021-11-19 14:39:33,608 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) [2021-11-19 14:39:33,608 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 942 transitions. [2021-11-19 14:39:33,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 14:39:33,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:33,614 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] [2021-11-19 14:39:33,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:33,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:33,833 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:33,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:33,834 INFO L85 PathProgramCache]: Analyzing trace with hash -33192984, now seen corresponding path program 1 times [2021-11-19 14:39:33,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:33,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771172018] [2021-11-19 14:39:33,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:33,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:33,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:33,836 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:33,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:39:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:34,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:39:34,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:39:34,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:39:35,169 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:35,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771172018] [2021-11-19 14:39:35,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771172018] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:39:35,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:39:35,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:39:35,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674586337] [2021-11-19 14:39:35,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:35,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:39:35,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:35,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:39:35,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:39:35,173 INFO L87 Difference]: Start difference. First operand 574 states and 942 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) [2021-11-19 14:39:35,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:35,445 INFO L93 Difference]: Finished difference Result 1147 states and 1893 transitions. [2021-11-19 14:39:35,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:39:35,447 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 [2021-11-19 14:39:35,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:35,454 INFO L225 Difference]: With dead ends: 1147 [2021-11-19 14:39:35,454 INFO L226 Difference]: Without dead ends: 595 [2021-11-19 14:39:35,458 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 [2021-11-19 14:39:35,459 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 148 mSDsluCounter, 4523 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5449 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:35,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5449 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:39:35,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-19 14:39:35,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 593. [2021-11-19 14:39:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 465 states have (on average 1.6666666666666667) internal successors, (775), 486 states have internal predecessors, (775), 100 states have call successors, (100), 26 states have call predecessors, (100), 27 states have return successors, (98), 93 states have call predecessors, (98), 95 states have call successors, (98) [2021-11-19 14:39:35,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 973 transitions. [2021-11-19 14:39:35,495 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 973 transitions. Word has length 134 [2021-11-19 14:39:35,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:35,496 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 973 transitions. [2021-11-19 14:39:35,496 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) [2021-11-19 14:39:35,496 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 973 transitions. [2021-11-19 14:39:35,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 14:39:35,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:35,503 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] [2021-11-19 14:39:35,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:35,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:35,728 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:35,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:35,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1253289321, now seen corresponding path program 1 times [2021-11-19 14:39:35,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:35,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146573441] [2021-11-19 14:39:35,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:35,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:35,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:35,731 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:35,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:39:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:36,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:39:36,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:39:36,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:39:37,094 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:37,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146573441] [2021-11-19 14:39:37,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146573441] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:39:37,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:39:37,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-19 14:39:37,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894216830] [2021-11-19 14:39:37,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:37,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:39:37,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:37,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:39:37,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:39:37,098 INFO L87 Difference]: Start difference. First operand 593 states and 973 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) [2021-11-19 14:39:37,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:37,209 INFO L93 Difference]: Finished difference Result 1160 states and 1915 transitions. [2021-11-19 14:39:37,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:39:37,211 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 [2021-11-19 14:39:37,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:37,221 INFO L225 Difference]: With dead ends: 1160 [2021-11-19 14:39:37,222 INFO L226 Difference]: Without dead ends: 589 [2021-11-19 14:39:37,226 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 [2021-11-19 14:39:37,227 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 8 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:37,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2774 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:39:37,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-19 14:39:37,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2021-11-19 14:39:37,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 463 states have (on average 1.6673866090712743) internal successors, (772), 483 states have internal predecessors, (772), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (95), 92 states have call predecessors, (95), 94 states have call successors, (95) [2021-11-19 14:39:37,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 966 transitions. [2021-11-19 14:39:37,268 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 966 transitions. Word has length 134 [2021-11-19 14:39:37,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:37,269 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 966 transitions. [2021-11-19 14:39:37,269 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) [2021-11-19 14:39:37,270 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 966 transitions. [2021-11-19 14:39:37,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-19 14:39:37,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:37,278 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] [2021-11-19 14:39:37,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:37,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:37,495 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:37,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:37,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1916228868, now seen corresponding path program 1 times [2021-11-19 14:39:37,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:37,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828914858] [2021-11-19 14:39:37,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:37,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:37,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:37,498 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:37,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:39:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:37,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:39:37,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:39:38,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:38,717 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:39:38,718 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:38,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828914858] [2021-11-19 14:39:38,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828914858] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:39:38,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:39:38,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:39:38,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509951613] [2021-11-19 14:39:38,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:38,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:39:38,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:38,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:39:38,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:39:38,722 INFO L87 Difference]: Start difference. First operand 589 states and 966 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) [2021-11-19 14:39:39,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:39,004 INFO L93 Difference]: Finished difference Result 1186 states and 1960 transitions. [2021-11-19 14:39:39,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:39:39,006 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 [2021-11-19 14:39:39,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:39,013 INFO L225 Difference]: With dead ends: 1186 [2021-11-19 14:39:39,014 INFO L226 Difference]: Without dead ends: 589 [2021-11-19 14:39:39,018 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 [2021-11-19 14:39:39,019 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 134 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2582 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:39,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2582 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:39:39,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-19 14:39:39,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2021-11-19 14:39:39,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 463 states have (on average 1.65658747300216) internal successors, (767), 483 states have internal predecessors, (767), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (95), 92 states have call predecessors, (95), 94 states have call successors, (95) [2021-11-19 14:39:39,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 961 transitions. [2021-11-19 14:39:39,053 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 961 transitions. Word has length 135 [2021-11-19 14:39:39,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:39,053 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 961 transitions. [2021-11-19 14:39:39,054 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) [2021-11-19 14:39:39,054 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 961 transitions. [2021-11-19 14:39:39,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 14:39:39,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:39,061 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] [2021-11-19 14:39:39,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:39,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:39,286 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:39,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:39,287 INFO L85 PathProgramCache]: Analyzing trace with hash -693688392, now seen corresponding path program 1 times [2021-11-19 14:39:39,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:39,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445983943] [2021-11-19 14:39:39,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:39,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:39,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:39,289 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:39,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:39:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:39,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:39:39,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:39:40,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:40,522 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:39:40,522 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:40,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445983943] [2021-11-19 14:39:40,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445983943] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:39:40,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:39:40,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:39:40,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227739871] [2021-11-19 14:39:40,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:40,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:39:40,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:40,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:39:40,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:39:40,526 INFO L87 Difference]: Start difference. First operand 589 states and 961 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) [2021-11-19 14:39:40,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:40,769 INFO L93 Difference]: Finished difference Result 1186 states and 1950 transitions. [2021-11-19 14:39:40,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:39:40,771 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 [2021-11-19 14:39:40,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:40,777 INFO L225 Difference]: With dead ends: 1186 [2021-11-19 14:39:40,778 INFO L226 Difference]: Without dead ends: 589 [2021-11-19 14:39:40,782 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 [2021-11-19 14:39:40,783 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 128 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2582 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:40,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2582 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:39:40,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-19 14:39:40,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2021-11-19 14:39:40,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 463 states have (on average 1.6457883369330453) internal successors, (762), 483 states have internal predecessors, (762), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (95), 92 states have call predecessors, (95), 94 states have call successors, (95) [2021-11-19 14:39:40,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 956 transitions. [2021-11-19 14:39:40,852 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 956 transitions. Word has length 137 [2021-11-19 14:39:40,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:40,852 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 956 transitions. [2021-11-19 14:39:40,853 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) [2021-11-19 14:39:40,853 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 956 transitions. [2021-11-19 14:39:40,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:39:40,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:40,860 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] [2021-11-19 14:39:40,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:41,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:41,084 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:41,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:41,085 INFO L85 PathProgramCache]: Analyzing trace with hash 875821148, now seen corresponding path program 1 times [2021-11-19 14:39:41,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:41,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139943340] [2021-11-19 14:39:41,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:41,086 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:41,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:41,087 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:41,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:39:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:41,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:39:41,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:39:41,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:39:42,287 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:42,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139943340] [2021-11-19 14:39:42,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139943340] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:39:42,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:39:42,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:39:42,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839340907] [2021-11-19 14:39:42,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:42,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:39:42,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:42,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:39:42,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:39:42,291 INFO L87 Difference]: Start difference. First operand 589 states and 956 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) [2021-11-19 14:39:42,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:42,529 INFO L93 Difference]: Finished difference Result 1207 states and 1971 transitions. [2021-11-19 14:39:42,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:39:42,531 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 [2021-11-19 14:39:42,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:42,538 INFO L225 Difference]: With dead ends: 1207 [2021-11-19 14:39:42,539 INFO L226 Difference]: Without dead ends: 619 [2021-11-19 14:39:42,543 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 [2021-11-19 14:39:42,544 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 143 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2592 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:42,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2592 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:39:42,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-11-19 14:39:42,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 604. [2021-11-19 14:39:42,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 478 states have (on average 1.6255230125523012) internal successors, (777), 497 states have internal predecessors, (777), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 14:39:42,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 970 transitions. [2021-11-19 14:39:42,580 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 970 transitions. Word has length 139 [2021-11-19 14:39:42,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:42,580 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 970 transitions. [2021-11-19 14:39:42,581 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) [2021-11-19 14:39:42,581 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 970 transitions. [2021-11-19 14:39:42,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:39:42,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:42,587 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] [2021-11-19 14:39:42,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:42,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:42,803 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:42,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:42,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1483641892, now seen corresponding path program 1 times [2021-11-19 14:39:42,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:42,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679379895] [2021-11-19 14:39:42,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:42,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:42,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:42,807 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:42,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:39:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:43,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:39:43,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:39:43,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:39:44,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:44,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679379895] [2021-11-19 14:39:44,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679379895] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:39:44,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:39:44,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 14:39:44,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951993463] [2021-11-19 14:39:44,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:44,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:39:44,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:44,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:39:44,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:39:44,267 INFO L87 Difference]: Start difference. First operand 604 states and 970 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) [2021-11-19 14:39:44,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:44,468 INFO L93 Difference]: Finished difference Result 1171 states and 1892 transitions. [2021-11-19 14:39:44,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:39:44,470 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 [2021-11-19 14:39:44,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:44,477 INFO L225 Difference]: With dead ends: 1171 [2021-11-19 14:39:44,478 INFO L226 Difference]: Without dead ends: 598 [2021-11-19 14:39:44,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:39:44,485 INFO L933 BasicCegarLoop]: 929 mSDtfsCounter, 131 mSDsluCounter, 4488 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5417 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:44,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5417 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:39:44,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-19 14:39:44,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 583. [2021-11-19 14:39:44,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 457 states have (on average 1.6192560175054704) internal successors, (740), 476 states have internal predecessors, (740), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 14:39:44,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 933 transitions. [2021-11-19 14:39:44,516 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 933 transitions. Word has length 139 [2021-11-19 14:39:44,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:44,516 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 933 transitions. [2021-11-19 14:39:44,517 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) [2021-11-19 14:39:44,517 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 933 transitions. [2021-11-19 14:39:44,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-19 14:39:44,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:44,523 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] [2021-11-19 14:39:44,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:44,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:44,739 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:44,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:44,739 INFO L85 PathProgramCache]: Analyzing trace with hash 2020187941, now seen corresponding path program 1 times [2021-11-19 14:39:44,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:44,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863893216] [2021-11-19 14:39:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:44,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:44,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:44,741 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:44,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:39:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:45,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:39:45,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:39:45,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:39:46,058 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:46,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863893216] [2021-11-19 14:39:46,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863893216] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:39:46,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:39:46,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:39:46,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250271121] [2021-11-19 14:39:46,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:46,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:39:46,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:46,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:39:46,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:39:46,061 INFO L87 Difference]: Start difference. First operand 583 states and 933 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) [2021-11-19 14:39:46,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:46,200 INFO L93 Difference]: Finished difference Result 1135 states and 1830 transitions. [2021-11-19 14:39:46,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:39:46,202 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 [2021-11-19 14:39:46,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:46,209 INFO L225 Difference]: With dead ends: 1135 [2021-11-19 14:39:46,209 INFO L226 Difference]: Without dead ends: 583 [2021-11-19 14:39:46,214 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 [2021-11-19 14:39:46,215 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 69 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2606 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:46,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2606 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:39:46,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-19 14:39:46,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-19 14:39:46,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 457 states have (on average 1.6170678336980306) internal successors, (739), 476 states have internal predecessors, (739), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 14:39:46,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 932 transitions. [2021-11-19 14:39:46,250 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 932 transitions. Word has length 140 [2021-11-19 14:39:46,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:46,251 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 932 transitions. [2021-11-19 14:39:46,251 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) [2021-11-19 14:39:46,252 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 932 transitions. [2021-11-19 14:39:46,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-19 14:39:46,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:46,258 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] [2021-11-19 14:39:46,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:46,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:46,471 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:46,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:46,471 INFO L85 PathProgramCache]: Analyzing trace with hash 19243735, now seen corresponding path program 1 times [2021-11-19 14:39:46,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:46,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561275590] [2021-11-19 14:39:46,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:46,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:46,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:46,473 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:46,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:39:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:46,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:39:46,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:39:47,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:39:47,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:47,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561275590] [2021-11-19 14:39:47,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561275590] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:39:47,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:39:47,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:39:47,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201758999] [2021-11-19 14:39:47,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:47,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:39:47,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:47,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:39:47,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:39:47,794 INFO L87 Difference]: Start difference. First operand 583 states and 932 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) [2021-11-19 14:39:47,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:47,930 INFO L93 Difference]: Finished difference Result 1135 states and 1829 transitions. [2021-11-19 14:39:47,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:39:47,932 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 [2021-11-19 14:39:47,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:47,939 INFO L225 Difference]: With dead ends: 1135 [2021-11-19 14:39:47,939 INFO L226 Difference]: Without dead ends: 583 [2021-11-19 14:39:47,944 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 [2021-11-19 14:39:47,944 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 67 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2606 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:47,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2606 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:39:47,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-19 14:39:47,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-19 14:39:47,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 457 states have (on average 1.6148796498905909) internal successors, (738), 476 states have internal predecessors, (738), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 14:39:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 931 transitions. [2021-11-19 14:39:47,974 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 931 transitions. Word has length 141 [2021-11-19 14:39:47,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:47,974 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 931 transitions. [2021-11-19 14:39:47,975 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) [2021-11-19 14:39:47,975 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 931 transitions. [2021-11-19 14:39:47,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 14:39:47,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:47,981 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] [2021-11-19 14:39:48,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:48,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:48,195 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:48,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:48,195 INFO L85 PathProgramCache]: Analyzing trace with hash -702093632, now seen corresponding path program 1 times [2021-11-19 14:39:48,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:48,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334286625] [2021-11-19 14:39:48,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:48,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:48,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:48,197 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:48,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:39:48,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:48,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:39:48,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:48,999 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:39:48,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:39:49,673 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:49,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334286625] [2021-11-19 14:39:49,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334286625] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:39:49,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:39:49,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:39:49,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456085457] [2021-11-19 14:39:49,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:49,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:39:49,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:49,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:39:49,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:39:49,676 INFO L87 Difference]: Start difference. First operand 583 states and 931 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) [2021-11-19 14:39:49,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:49,982 INFO L93 Difference]: Finished difference Result 1140 states and 1836 transitions. [2021-11-19 14:39:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:39:49,983 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 [2021-11-19 14:39:49,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:49,991 INFO L225 Difference]: With dead ends: 1140 [2021-11-19 14:39:49,991 INFO L226 Difference]: Without dead ends: 594 [2021-11-19 14:39:49,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:39:49,997 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 109 mSDsluCounter, 5174 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6047 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:49,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 6047 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:39:50,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-19 14:39:50,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 585. [2021-11-19 14:39:50,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 459 states have (on average 1.6100217864923747) internal successors, (739), 478 states have internal predecessors, (739), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 14:39:50,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 932 transitions. [2021-11-19 14:39:50,032 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 932 transitions. Word has length 142 [2021-11-19 14:39:50,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:50,033 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 932 transitions. [2021-11-19 14:39:50,033 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) [2021-11-19 14:39:50,033 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 932 transitions. [2021-11-19 14:39:50,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-19 14:39:50,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:50,040 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] [2021-11-19 14:39:50,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:50,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:50,255 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:50,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:50,256 INFO L85 PathProgramCache]: Analyzing trace with hash -692040062, now seen corresponding path program 1 times [2021-11-19 14:39:50,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:50,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919147842] [2021-11-19 14:39:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:50,256 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:50,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:50,257 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:50,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:39:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:50,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:39:50,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:39:51,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:39:51,665 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:51,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919147842] [2021-11-19 14:39:51,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919147842] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:39:51,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:39:51,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:39:51,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883655829] [2021-11-19 14:39:51,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:51,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:39:51,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:51,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:39:51,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:39:51,667 INFO L87 Difference]: Start difference. First operand 585 states and 932 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) [2021-11-19 14:39:51,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:51,993 INFO L93 Difference]: Finished difference Result 1132 states and 1817 transitions. [2021-11-19 14:39:51,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:39:51,995 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 [2021-11-19 14:39:51,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:52,001 INFO L225 Difference]: With dead ends: 1132 [2021-11-19 14:39:52,001 INFO L226 Difference]: Without dead ends: 590 [2021-11-19 14:39:52,005 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 [2021-11-19 14:39:52,006 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 77 mSDsluCounter, 5180 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 6055 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:52,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 6055 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:39:52,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-11-19 14:39:52,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 587. [2021-11-19 14:39:52,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 461 states have (on average 1.6052060737527114) internal successors, (740), 480 states have internal predecessors, (740), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 14:39:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 933 transitions. [2021-11-19 14:39:52,037 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 933 transitions. Word has length 143 [2021-11-19 14:39:52,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:52,038 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 933 transitions. [2021-11-19 14:39:52,038 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) [2021-11-19 14:39:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 933 transitions. [2021-11-19 14:39:52,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-19 14:39:52,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:52,045 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] [2021-11-19 14:39:52,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:52,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:52,268 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:52,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:52,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1806094774, now seen corresponding path program 1 times [2021-11-19 14:39:52,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:52,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542237090] [2021-11-19 14:39:52,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:52,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:52,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:52,270 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:52,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:39:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:52,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:39:52,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:39:52,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:39:53,449 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:53,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542237090] [2021-11-19 14:39:53,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542237090] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:39:53,450 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:39:53,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:39:53,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895470395] [2021-11-19 14:39:53,450 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:53,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:39:53,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:53,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:39:53,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:39:53,453 INFO L87 Difference]: Start difference. First operand 587 states and 933 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) [2021-11-19 14:39:53,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:53,683 INFO L93 Difference]: Finished difference Result 1078 states and 1744 transitions. [2021-11-19 14:39:53,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:39:53,685 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 [2021-11-19 14:39:53,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:53,691 INFO L225 Difference]: With dead ends: 1078 [2021-11-19 14:39:53,692 INFO L226 Difference]: Without dead ends: 580 [2021-11-19 14:39:53,696 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 [2021-11-19 14:39:53,697 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 55 mSDsluCounter, 5253 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 6140 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:53,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 6140 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:39:53,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-19 14:39:53,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2021-11-19 14:39:53,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 454 states have (on average 1.6123348017621146) internal successors, (732), 473 states have internal predecessors, (732), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 14:39:53,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 925 transitions. [2021-11-19 14:39:53,725 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 925 transitions. Word has length 144 [2021-11-19 14:39:53,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:53,726 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 925 transitions. [2021-11-19 14:39:53,726 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) [2021-11-19 14:39:53,726 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 925 transitions. [2021-11-19 14:39:53,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-19 14:39:53,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:53,733 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:39:53,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:53,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:53,947 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:53,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:53,947 INFO L85 PathProgramCache]: Analyzing trace with hash -396347874, now seen corresponding path program 1 times [2021-11-19 14:39:53,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:53,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751976636] [2021-11-19 14:39:53,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:53,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:53,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:53,950 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:53,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:39:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:54,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:39:54,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:54,692 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:39:54,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:39:55,181 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:55,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751976636] [2021-11-19 14:39:55,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751976636] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:39:55,181 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:39:55,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:39:55,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000541644] [2021-11-19 14:39:55,182 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:55,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:39:55,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:55,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:39:55,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:39:55,184 INFO L87 Difference]: Start difference. First operand 580 states and 925 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) [2021-11-19 14:39:55,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:55,362 INFO L93 Difference]: Finished difference Result 1083 states and 1758 transitions. [2021-11-19 14:39:55,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:39:55,364 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 [2021-11-19 14:39:55,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:55,370 INFO L225 Difference]: With dead ends: 1083 [2021-11-19 14:39:55,371 INFO L226 Difference]: Without dead ends: 577 [2021-11-19 14:39:55,374 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 [2021-11-19 14:39:55,375 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 98 mSDsluCounter, 6049 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 6928 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:55,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 6928 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:39:55,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-19 14:39:55,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-19 14:39:55,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 451 states have (on average 1.6119733924611974) internal successors, (727), 470 states have internal predecessors, (727), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 14:39:55,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 920 transitions. [2021-11-19 14:39:55,403 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 920 transitions. Word has length 145 [2021-11-19 14:39:55,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:55,403 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 920 transitions. [2021-11-19 14:39:55,404 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) [2021-11-19 14:39:55,404 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 920 transitions. [2021-11-19 14:39:55,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-19 14:39:55,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:55,410 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] [2021-11-19 14:39:55,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:55,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:55,632 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:55,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:55,632 INFO L85 PathProgramCache]: Analyzing trace with hash 598987422, now seen corresponding path program 1 times [2021-11-19 14:39:55,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:55,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987111867] [2021-11-19 14:39:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:55,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:55,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:55,635 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:55,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:39:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:56,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:39:56,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:39:56,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:39:56,973 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:56,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987111867] [2021-11-19 14:39:56,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987111867] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:39:56,974 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:39:56,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:39:56,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721149979] [2021-11-19 14:39:56,975 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:56,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:39:56,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:56,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:39:56,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:39:56,977 INFO L87 Difference]: Start difference. First operand 577 states and 920 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) [2021-11-19 14:39:57,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:57,141 INFO L93 Difference]: Finished difference Result 1080 states and 1753 transitions. [2021-11-19 14:39:57,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:39:57,143 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 [2021-11-19 14:39:57,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:57,149 INFO L225 Difference]: With dead ends: 1080 [2021-11-19 14:39:57,150 INFO L226 Difference]: Without dead ends: 569 [2021-11-19 14:39:57,153 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 [2021-11-19 14:39:57,154 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 142 mSDsluCounter, 4327 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 5205 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:57,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 5205 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:39:57,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-19 14:39:57,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2021-11-19 14:39:57,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 443 states have (on average 1.6162528216704288) internal successors, (716), 462 states have internal predecessors, (716), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 14:39:57,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 909 transitions. [2021-11-19 14:39:57,182 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 909 transitions. Word has length 145 [2021-11-19 14:39:57,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:57,183 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 909 transitions. [2021-11-19 14:39:57,183 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) [2021-11-19 14:39:57,184 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 909 transitions. [2021-11-19 14:39:57,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-19 14:39:57,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:57,189 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, 1, 1, 1] [2021-11-19 14:39:57,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:57,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:57,409 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:57,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:57,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1606904338, now seen corresponding path program 1 times [2021-11-19 14:39:57,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:57,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178470986] [2021-11-19 14:39:57,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:57,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:57,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:57,414 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:57,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:39:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:57,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:39:57,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:39:58,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:39:58,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:58,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178470986] [2021-11-19 14:39:58,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178470986] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:39:58,922 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:39:58,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:39:58,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578811873] [2021-11-19 14:39:58,923 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:58,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:39:58,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:58,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:39:58,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:39:58,925 INFO L87 Difference]: Start difference. First operand 569 states and 909 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) [2021-11-19 14:39:59,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:59,179 INFO L93 Difference]: Finished difference Result 1066 states and 1731 transitions. [2021-11-19 14:39:59,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:39:59,181 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 [2021-11-19 14:39:59,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:59,187 INFO L225 Difference]: With dead ends: 1066 [2021-11-19 14:39:59,188 INFO L226 Difference]: Without dead ends: 569 [2021-11-19 14:39:59,191 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 [2021-11-19 14:39:59,192 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 100 mSDsluCounter, 6030 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 6904 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:59,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 6904 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:39:59,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-19 14:39:59,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2021-11-19 14:39:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 443 states have (on average 1.6139954853273137) internal successors, (715), 462 states have internal predecessors, (715), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 14:39:59,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 908 transitions. [2021-11-19 14:39:59,251 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 908 transitions. Word has length 146 [2021-11-19 14:39:59,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:59,252 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 908 transitions. [2021-11-19 14:39:59,252 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) [2021-11-19 14:39:59,252 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 908 transitions. [2021-11-19 14:39:59,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-19 14:39:59,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:59,259 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] [2021-11-19 14:39:59,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:59,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:59,470 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:59,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:59,470 INFO L85 PathProgramCache]: Analyzing trace with hash 896794396, now seen corresponding path program 1 times [2021-11-19 14:39:59,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:59,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [539957174] [2021-11-19 14:39:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:59,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:59,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:59,473 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:59,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:39:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:59,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:39:59,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:40:00,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:40:01,002 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:01,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [539957174] [2021-11-19 14:40:01,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [539957174] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:01,003 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:01,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:40:01,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228453994] [2021-11-19 14:40:01,003 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:01,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:40:01,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:01,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:40:01,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:40:01,005 INFO L87 Difference]: Start difference. First operand 569 states and 908 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) [2021-11-19 14:40:01,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:01,301 INFO L93 Difference]: Finished difference Result 1110 states and 1788 transitions. [2021-11-19 14:40:01,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:40:01,303 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 [2021-11-19 14:40:01,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:01,309 INFO L225 Difference]: With dead ends: 1110 [2021-11-19 14:40:01,309 INFO L226 Difference]: Without dead ends: 566 [2021-11-19 14:40:01,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:40:01,314 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 127 mSDsluCounter, 6835 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 7697 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:01,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 7697 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:40:01,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-19 14:40:01,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2021-11-19 14:40:01,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 440 states have (on average 1.606818181818182) internal successors, (707), 459 states have internal predecessors, (707), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 14:40:01,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 900 transitions. [2021-11-19 14:40:01,345 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 900 transitions. Word has length 147 [2021-11-19 14:40:01,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:01,345 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 900 transitions. [2021-11-19 14:40:01,346 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) [2021-11-19 14:40:01,346 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 900 transitions. [2021-11-19 14:40:01,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-19 14:40:01,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:01,351 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] [2021-11-19 14:40:01,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:01,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:01,565 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:01,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:01,566 INFO L85 PathProgramCache]: Analyzing trace with hash -549200077, now seen corresponding path program 1 times [2021-11-19 14:40:01,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:01,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502875000] [2021-11-19 14:40:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:01,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:01,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:01,568 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:01,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:40:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:01,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:40:01,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:40:02,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:40:02,950 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:02,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502875000] [2021-11-19 14:40:02,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502875000] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:02,950 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:02,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:40:02,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483921048] [2021-11-19 14:40:02,951 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:02,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:40:02,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:02,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:40:02,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:40:02,953 INFO L87 Difference]: Start difference. First operand 566 states and 900 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) [2021-11-19 14:40:03,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:03,157 INFO L93 Difference]: Finished difference Result 1057 states and 1711 transitions. [2021-11-19 14:40:03,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:40:03,161 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 [2021-11-19 14:40:03,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:03,167 INFO L225 Difference]: With dead ends: 1057 [2021-11-19 14:40:03,167 INFO L226 Difference]: Without dead ends: 566 [2021-11-19 14:40:03,171 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 [2021-11-19 14:40:03,171 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 69 mSDsluCounter, 5976 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 6839 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:03,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 6839 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:40:03,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-19 14:40:03,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2021-11-19 14:40:03,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 440 states have (on average 1.6045454545454545) internal successors, (706), 459 states have internal predecessors, (706), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 14:40:03,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 899 transitions. [2021-11-19 14:40:03,199 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 899 transitions. Word has length 148 [2021-11-19 14:40:03,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:03,200 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 899 transitions. [2021-11-19 14:40:03,200 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) [2021-11-19 14:40:03,200 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 899 transitions. [2021-11-19 14:40:03,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-19 14:40:03,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:03,205 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] [2021-11-19 14:40:03,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:03,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:03,429 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:03,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:03,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1483735021, now seen corresponding path program 1 times [2021-11-19 14:40:03,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:03,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825549591] [2021-11-19 14:40:03,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:03,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:03,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:03,431 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:03,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:40:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:03,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:40:03,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:40:04,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:40:04,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:04,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825549591] [2021-11-19 14:40:04,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825549591] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:04,770 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:04,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:40:04,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834632777] [2021-11-19 14:40:04,770 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:04,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:40:04,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:04,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:40:04,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:40:04,772 INFO L87 Difference]: Start difference. First operand 566 states and 899 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) [2021-11-19 14:40:05,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:05,039 INFO L93 Difference]: Finished difference Result 1095 states and 1756 transitions. [2021-11-19 14:40:05,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:40:05,041 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 [2021-11-19 14:40:05,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:05,047 INFO L225 Difference]: With dead ends: 1095 [2021-11-19 14:40:05,047 INFO L226 Difference]: Without dead ends: 563 [2021-11-19 14:40:05,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:40:05,052 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 114 mSDsluCounter, 6829 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 7690 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:05,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 7690 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:40:05,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-19 14:40:05,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2021-11-19 14:40:05,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 437 states have (on average 1.597254004576659) internal successors, (698), 456 states have internal predecessors, (698), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 14:40:05,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 891 transitions. [2021-11-19 14:40:05,085 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 891 transitions. Word has length 149 [2021-11-19 14:40:05,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:05,086 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 891 transitions. [2021-11-19 14:40:05,087 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) [2021-11-19 14:40:05,087 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 891 transitions. [2021-11-19 14:40:05,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-19 14:40:05,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:05,092 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] [2021-11-19 14:40:05,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:05,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:05,307 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:05,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:05,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1244870456, now seen corresponding path program 1 times [2021-11-19 14:40:05,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:05,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127648767] [2021-11-19 14:40:05,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:05,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:05,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:05,310 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:05,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:40:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:05,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:40:05,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:40:06,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:40:06,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:06,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127648767] [2021-11-19 14:40:06,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127648767] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:40:06,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:40:06,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:40:06,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051296273] [2021-11-19 14:40:06,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:06,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:40:06,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:06,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:40:06,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:40:06,750 INFO L87 Difference]: Start difference. First operand 563 states and 891 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) [2021-11-19 14:40:07,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:07,724 INFO L93 Difference]: Finished difference Result 1050 states and 1720 transitions. [2021-11-19 14:40:07,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:40:07,726 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 [2021-11-19 14:40:07,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:07,733 INFO L225 Difference]: With dead ends: 1050 [2021-11-19 14:40:07,733 INFO L226 Difference]: Without dead ends: 567 [2021-11-19 14:40:07,738 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 [2021-11-19 14:40:07,738 INFO L933 BasicCegarLoop]: 848 mSDtfsCounter, 795 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:07,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [813 Valid, 2187 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:40:07,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-11-19 14:40:07,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2021-11-19 14:40:07,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 440 states have (on average 1.5931818181818183) internal successors, (701), 459 states have internal predecessors, (701), 99 states have call successors, (99), 28 states have call predecessors, (99), 27 states have return successors, (95), 92 states have call predecessors, (95), 94 states have call successors, (95) [2021-11-19 14:40:07,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 895 transitions. [2021-11-19 14:40:07,771 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 895 transitions. Word has length 150 [2021-11-19 14:40:07,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:07,771 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 895 transitions. [2021-11-19 14:40:07,772 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) [2021-11-19 14:40:07,772 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 895 transitions. [2021-11-19 14:40:07,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-19 14:40:07,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:07,776 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] [2021-11-19 14:40:07,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:08,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:08,000 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:08,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:08,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1610470090, now seen corresponding path program 1 times [2021-11-19 14:40:08,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:08,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1676755918] [2021-11-19 14:40:08,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:08,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:08,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:08,002 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:08,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:40:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:08,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:40:08,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:40:08,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:40:09,498 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:09,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1676755918] [2021-11-19 14:40:09,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1676755918] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:40:09,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:40:09,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:40:09,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914595027] [2021-11-19 14:40:09,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:09,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:40:09,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:09,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:40:09,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:40:09,502 INFO L87 Difference]: Start difference. First operand 567 states and 895 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) [2021-11-19 14:40:10,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:10,374 INFO L93 Difference]: Finished difference Result 1059 states and 1727 transitions. [2021-11-19 14:40:10,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:40:10,375 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 [2021-11-19 14:40:10,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:10,381 INFO L225 Difference]: With dead ends: 1059 [2021-11-19 14:40:10,381 INFO L226 Difference]: Without dead ends: 572 [2021-11-19 14:40:10,384 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 [2021-11-19 14:40:10,385 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 802 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 2188 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:10,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [819 Valid, 2188 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:40:10,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-19 14:40:10,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2021-11-19 14:40:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 444 states have (on average 1.587837837837838) internal successors, (705), 463 states have internal predecessors, (705), 99 states have call successors, (99), 29 states have call predecessors, (99), 28 states have return successors, (96), 92 states have call predecessors, (96), 94 states have call successors, (96) [2021-11-19 14:40:10,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 900 transitions. [2021-11-19 14:40:10,417 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 900 transitions. Word has length 152 [2021-11-19 14:40:10,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:10,418 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 900 transitions. [2021-11-19 14:40:10,418 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) [2021-11-19 14:40:10,418 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 900 transitions. [2021-11-19 14:40:10,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-19 14:40:10,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:10,423 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] [2021-11-19 14:40:10,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:10,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:10,639 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:10,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1349907192, now seen corresponding path program 1 times [2021-11-19 14:40:10,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:10,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597769568] [2021-11-19 14:40:10,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:10,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:10,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:10,642 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:10,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:40:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:11,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:40:11,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:40:11,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:40:12,162 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:12,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [597769568] [2021-11-19 14:40:12,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [597769568] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:40:12,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:40:12,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:40:12,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330803539] [2021-11-19 14:40:12,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:12,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:40:12,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:12,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:40:12,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:40:12,164 INFO L87 Difference]: Start difference. First operand 572 states and 900 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) [2021-11-19 14:40:13,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:13,080 INFO L93 Difference]: Finished difference Result 1070 states and 1736 transitions. [2021-11-19 14:40:13,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:40:13,081 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 [2021-11-19 14:40:13,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:13,087 INFO L225 Difference]: With dead ends: 1070 [2021-11-19 14:40:13,087 INFO L226 Difference]: Without dead ends: 578 [2021-11-19 14:40:13,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:40:13,092 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 805 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 2188 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:13,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 2188 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:40:13,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-11-19 14:40:13,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2021-11-19 14:40:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 449 states have (on average 1.581291759465479) internal successors, (710), 468 states have internal predecessors, (710), 99 states have call successors, (99), 30 states have call predecessors, (99), 29 states have return successors, (97), 92 states have call predecessors, (97), 94 states have call successors, (97) [2021-11-19 14:40:13,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 906 transitions. [2021-11-19 14:40:13,124 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 906 transitions. Word has length 154 [2021-11-19 14:40:13,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:13,124 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 906 transitions. [2021-11-19 14:40:13,125 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) [2021-11-19 14:40:13,125 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 906 transitions. [2021-11-19 14:40:13,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 14:40:13,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:13,129 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] [2021-11-19 14:40:13,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:13,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:13,353 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:13,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:13,354 INFO L85 PathProgramCache]: Analyzing trace with hash -318794002, now seen corresponding path program 1 times [2021-11-19 14:40:13,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:13,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432594524] [2021-11-19 14:40:13,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:13,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:13,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:13,355 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:13,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:40:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:13,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:40:13,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:40:14,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:40:14,805 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:14,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432594524] [2021-11-19 14:40:14,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432594524] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:40:14,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:40:14,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:40:14,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406683230] [2021-11-19 14:40:14,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:14,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:40:14,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:14,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:40:14,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:40:14,809 INFO L87 Difference]: Start difference. First operand 578 states and 906 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) [2021-11-19 14:40:15,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:15,751 INFO L93 Difference]: Finished difference Result 1083 states and 1747 transitions. [2021-11-19 14:40:15,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:40:15,752 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 [2021-11-19 14:40:15,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:15,759 INFO L225 Difference]: With dead ends: 1083 [2021-11-19 14:40:15,759 INFO L226 Difference]: Without dead ends: 585 [2021-11-19 14:40:15,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:40:15,764 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 797 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 2188 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:15,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 2188 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:40:15,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-11-19 14:40:15,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 585. [2021-11-19 14:40:15,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 455 states have (on average 1.5736263736263736) internal successors, (716), 474 states have internal predecessors, (716), 99 states have call successors, (99), 31 states have call predecessors, (99), 30 states have return successors, (98), 92 states have call predecessors, (98), 94 states have call successors, (98) [2021-11-19 14:40:15,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 913 transitions. [2021-11-19 14:40:15,796 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 913 transitions. Word has length 156 [2021-11-19 14:40:15,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:15,797 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 913 transitions. [2021-11-19 14:40:15,797 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) [2021-11-19 14:40:15,797 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 913 transitions. [2021-11-19 14:40:15,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-19 14:40:15,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:15,801 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] [2021-11-19 14:40:15,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:16,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:16,024 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:16,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:16,024 INFO L85 PathProgramCache]: Analyzing trace with hash 604279128, now seen corresponding path program 1 times [2021-11-19 14:40:16,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:16,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195195529] [2021-11-19 14:40:16,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:16,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:16,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:16,028 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:16,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 14:40:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:16,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:40:16,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:40:16,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:40:17,476 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:17,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195195529] [2021-11-19 14:40:17,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195195529] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:40:17,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:40:17,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-19 14:40:17,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920105909] [2021-11-19 14:40:17,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:17,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:40:17,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:17,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:40:17,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:40:17,483 INFO L87 Difference]: Start difference. First operand 585 states and 913 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 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) [2021-11-19 14:40:18,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:18,296 INFO L93 Difference]: Finished difference Result 1092 states and 1749 transitions. [2021-11-19 14:40:18,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:40:18,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 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 158 [2021-11-19 14:40:18,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:18,303 INFO L225 Difference]: With dead ends: 1092 [2021-11-19 14:40:18,303 INFO L226 Difference]: Without dead ends: 587 [2021-11-19 14:40:18,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:40:18,308 INFO L933 BasicCegarLoop]: 848 mSDtfsCounter, 786 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:18,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 2187 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:40:18,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-11-19 14:40:18,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 587. [2021-11-19 14:40:18,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 456 states have (on average 1.5723684210526316) internal successors, (717), 476 states have internal predecessors, (717), 99 states have call successors, (99), 31 states have call predecessors, (99), 31 states have return successors, (99), 92 states have call predecessors, (99), 94 states have call successors, (99) [2021-11-19 14:40:18,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 915 transitions. [2021-11-19 14:40:18,338 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 915 transitions. Word has length 158 [2021-11-19 14:40:18,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:18,339 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 915 transitions. [2021-11-19 14:40:18,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 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) [2021-11-19 14:40:18,339 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 915 transitions. [2021-11-19 14:40:18,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-19 14:40:18,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:18,344 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] [2021-11-19 14:40:18,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:18,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:18,568 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:18,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:18,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1551819592, now seen corresponding path program 1 times [2021-11-19 14:40:18,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:18,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801932570] [2021-11-19 14:40:18,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:18,570 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:18,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:18,571 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:18,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 14:40:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:19,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 14:40:19,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:40:19,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:20,955 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:40:20,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:20,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801932570] [2021-11-19 14:40:20,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801932570] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:40:20,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1914565535] [2021-11-19 14:40:20,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:20,956 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:40:20,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:40:20,957 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:40:20,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-19 14:40:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:21,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:40:21,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:40:21,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:40:22,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1914565535] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:22,601 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:40:22,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 14:40:22,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635846036] [2021-11-19 14:40:22,602 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:22,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:40:22,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:22,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:40:22,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:40:22,608 INFO L87 Difference]: Start difference. First operand 587 states and 915 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) [2021-11-19 14:40:23,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:23,406 INFO L93 Difference]: Finished difference Result 1090 states and 1737 transitions. [2021-11-19 14:40:23,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:40:23,406 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 [2021-11-19 14:40:23,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:23,416 INFO L225 Difference]: With dead ends: 1090 [2021-11-19 14:40:23,416 INFO L226 Difference]: Without dead ends: 583 [2021-11-19 14:40:23,420 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 [2021-11-19 14:40:23,420 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 1910 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1910 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:23,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1910 Valid, 789 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [529 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:40:23,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-19 14:40:23,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-19 14:40:23,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 454 states have (on average 1.5682819383259912) internal successors, (712), 473 states have internal predecessors, (712), 97 states have call successors, (97), 31 states have call predecessors, (97), 31 states have return successors, (98), 91 states have call predecessors, (98), 93 states have call successors, (98) [2021-11-19 14:40:23,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 907 transitions. [2021-11-19 14:40:23,461 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 907 transitions. Word has length 158 [2021-11-19 14:40:23,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:23,462 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 907 transitions. [2021-11-19 14:40:23,463 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) [2021-11-19 14:40:23,463 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 907 transitions. [2021-11-19 14:40:23,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-19 14:40:23,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:23,467 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] [2021-11-19 14:40:23,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:23,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-19 14:40:23,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:23,871 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:23,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:23,871 INFO L85 PathProgramCache]: Analyzing trace with hash -861911061, now seen corresponding path program 1 times [2021-11-19 14:40:23,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:23,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32864469] [2021-11-19 14:40:23,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:23,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:23,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:23,873 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:23,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 14:40:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:24,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 14:40:24,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:40:24,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:40:25,986 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:25,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32864469] [2021-11-19 14:40:25,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32864469] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:40:25,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1831015624] [2021-11-19 14:40:25,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:25,987 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:40:25,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:40:25,987 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:40:25,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-19 14:40:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:26,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 14:40:26,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:40:26,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:40:28,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1831015624] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:40:28,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944357938] [2021-11-19 14:40:28,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:28,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:40:28,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:40:28,085 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:40:28,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-19 14:40:28,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:28,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 14:40:28,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:40:28,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:40:29,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944357938] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:40:29,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:40:29,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-19 14:40:29,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877831940] [2021-11-19 14:40:29,875 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:40:29,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 14:40:29,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:29,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 14:40:29,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:40:29,876 INFO L87 Difference]: Start difference. First operand 583 states and 907 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) [2021-11-19 14:40:39,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:39,578 INFO L93 Difference]: Finished difference Result 1709 states and 2750 transitions. [2021-11-19 14:40:39,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:40:39,580 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 [2021-11-19 14:40:39,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:39,593 INFO L225 Difference]: With dead ends: 1709 [2021-11-19 14:40:39,593 INFO L226 Difference]: Without dead ends: 1206 [2021-11-19 14:40:39,598 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 [2021-11-19 14:40:39,599 INFO L933 BasicCegarLoop]: 1628 mSDtfsCounter, 4680 mSDsluCounter, 4800 mSDsCounter, 0 mSdLazyCounter, 9194 mSolverCounterSat, 1455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4705 SdHoareTripleChecker+Valid, 6428 SdHoareTripleChecker+Invalid, 10649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1455 IncrementalHoareTripleChecker+Valid, 9194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:39,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4705 Valid, 6428 Invalid, 10649 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1455 Valid, 9194 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2021-11-19 14:40:39,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-11-19 14:40:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1192. [2021-11-19 14:40:39,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 908 states have (on average 1.592511013215859) internal successors, (1446), 949 states have internal predecessors, (1446), 222 states have call successors, (222), 55 states have call predecessors, (222), 61 states have return successors, (240), 218 states have call predecessors, (240), 218 states have call successors, (240) [2021-11-19 14:40:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1908 transitions. [2021-11-19 14:40:39,690 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1908 transitions. Word has length 159 [2021-11-19 14:40:39,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:39,691 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 1908 transitions. [2021-11-19 14:40:39,691 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) [2021-11-19 14:40:39,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1908 transitions. [2021-11-19 14:40:39,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-19 14:40:39,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:39,699 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] [2021-11-19 14:40:39,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:39,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:40,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-19 14:40:40,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:40:40,323 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:40,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:40,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1378524794, now seen corresponding path program 1 times [2021-11-19 14:40:40,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:40,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793237469] [2021-11-19 14:40:40,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:40,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:40,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:40,326 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:40,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-19 14:40:40,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:40,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:40:40,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:40:41,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:40:41,601 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:41,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793237469] [2021-11-19 14:40:41,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793237469] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:41,602 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:41,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-19 14:40:41,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030277702] [2021-11-19 14:40:41,602 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:41,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:40:41,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:41,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:40:41,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:40:41,604 INFO L87 Difference]: Start difference. First operand 1192 states and 1908 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) [2021-11-19 14:40:41,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:41,859 INFO L93 Difference]: Finished difference Result 1698 states and 2726 transitions. [2021-11-19 14:40:41,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:40:41,861 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 [2021-11-19 14:40:41,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:41,867 INFO L225 Difference]: With dead ends: 1698 [2021-11-19 14:40:41,868 INFO L226 Difference]: Without dead ends: 576 [2021-11-19 14:40:41,874 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 [2021-11-19 14:40:41,875 INFO L933 BasicCegarLoop]: 844 mSDtfsCounter, 112 mSDsluCounter, 5008 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 5852 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:41,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 5852 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:40:41,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-11-19 14:40:41,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2021-11-19 14:40:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 449 states have (on average 1.5634743875278396) internal successors, (702), 468 states have internal predecessors, (702), 95 states have call successors, (95), 31 states have call predecessors, (95), 31 states have return successors, (96), 89 states have call predecessors, (96), 91 states have call successors, (96) [2021-11-19 14:40:41,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 893 transitions. [2021-11-19 14:40:41,915 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 893 transitions. Word has length 161 [2021-11-19 14:40:41,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:41,916 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 893 transitions. [2021-11-19 14:40:41,916 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) [2021-11-19 14:40:41,916 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 893 transitions. [2021-11-19 14:40:41,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-19 14:40:41,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:41,920 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] [2021-11-19 14:40:41,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:42,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:42,135 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:42,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:42,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1629577450, now seen corresponding path program 1 times [2021-11-19 14:40:42,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:42,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896493226] [2021-11-19 14:40:42,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:42,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:42,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:42,139 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:42,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-19 14:40:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:42,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:40:42,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:40:43,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:40:44,167 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:44,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896493226] [2021-11-19 14:40:44,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896493226] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:40:44,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1118308369] [2021-11-19 14:40:44,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:44,168 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:40:44,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:40:44,170 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:40:44,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-19 14:40:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:44,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:40:44,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:40:45,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:40:46,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1118308369] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:40:46,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466094602] [2021-11-19 14:40:46,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:46,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:40:46,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:40:46,029 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:40:46,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-19 14:40:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:46,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:40:46,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:40:46,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:47,673 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:40:47,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466094602] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:40:47,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:40:47,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-19 14:40:47,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315193460] [2021-11-19 14:40:47,675 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:40:47,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:40:47,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:47,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:40:47,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:40:47,677 INFO L87 Difference]: Start difference. First operand 576 states and 893 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) [2021-11-19 14:40:50,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:50,071 INFO L93 Difference]: Finished difference Result 1078 states and 1710 transitions. [2021-11-19 14:40:50,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:40:50,072 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 [2021-11-19 14:40:50,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:50,076 INFO L225 Difference]: With dead ends: 1078 [2021-11-19 14:40:50,077 INFO L226 Difference]: Without dead ends: 580 [2021-11-19 14:40:50,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 974 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:40:50,081 INFO L933 BasicCegarLoop]: 762 mSDtfsCounter, 1327 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 2316 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 1968 SdHoareTripleChecker+Invalid, 2681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 2316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:50,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1327 Valid, 1968 Invalid, 2681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 2316 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 14:40:50,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-19 14:40:50,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 578. [2021-11-19 14:40:50,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 451 states have (on average 1.5609756097560976) internal successors, (704), 469 states have internal predecessors, (704), 95 states have call successors, (95), 31 states have call predecessors, (95), 31 states have return successors, (96), 90 states have call predecessors, (96), 91 states have call successors, (96) [2021-11-19 14:40:50,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 895 transitions. [2021-11-19 14:40:50,179 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 895 transitions. Word has length 165 [2021-11-19 14:40:50,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:50,180 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 895 transitions. [2021-11-19 14:40:50,180 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) [2021-11-19 14:40:50,180 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 895 transitions. [2021-11-19 14:40:50,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-19 14:40:50,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:50,185 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] [2021-11-19 14:40:50,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:50,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-19 14:40:50,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-11-19 14:40:50,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:50,789 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:50,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:50,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1821259940, now seen corresponding path program 1 times [2021-11-19 14:40:50,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:50,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174113946] [2021-11-19 14:40:50,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:50,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:50,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:50,792 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:50,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-19 14:40:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:51,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:40:51,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:51,663 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:40:51,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:40:52,304 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:52,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174113946] [2021-11-19 14:40:52,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174113946] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:40:52,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1570785692] [2021-11-19 14:40:52,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:52,305 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:40:52,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:40:52,316 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:40:52,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-19 14:40:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:52,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:40:52,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:53,181 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:40:53,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:40:53,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1570785692] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:40:53,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619215391] [2021-11-19 14:40:53,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:53,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:40:53,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:40:53,873 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:40:53,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-19 14:40:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:54,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:40:54,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:40:54,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:55,118 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:40:55,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619215391] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:40:55,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:40:55,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-19 14:40:55,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254320126] [2021-11-19 14:40:55,120 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:40:55,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:40:55,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:55,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:40:55,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:40:55,122 INFO L87 Difference]: Start difference. First operand 578 states and 895 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) [2021-11-19 14:41:00,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:00,979 INFO L93 Difference]: Finished difference Result 2071 states and 3327 transitions. [2021-11-19 14:41:00,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:41:00,981 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 [2021-11-19 14:41:00,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:00,994 INFO L225 Difference]: With dead ends: 2071 [2021-11-19 14:41:00,994 INFO L226 Difference]: Without dead ends: 1569 [2021-11-19 14:41:00,997 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 [2021-11-19 14:41:00,998 INFO L933 BasicCegarLoop]: 1364 mSDtfsCounter, 3998 mSDsluCounter, 2133 mSDsCounter, 0 mSdLazyCounter, 4918 mSolverCounterSat, 1127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4079 SdHoareTripleChecker+Valid, 3497 SdHoareTripleChecker+Invalid, 6045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1127 IncrementalHoareTripleChecker+Valid, 4918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:00,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4079 Valid, 3497 Invalid, 6045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1127 Valid, 4918 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-11-19 14:41:01,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-11-19 14:41:01,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1513. [2021-11-19 14:41:01,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1173 states have (on average 1.5831202046035806) internal successors, (1857), 1218 states have internal predecessors, (1857), 259 states have call successors, (259), 80 states have call predecessors, (259), 80 states have return successors, (281), 251 states have call predecessors, (281), 255 states have call successors, (281) [2021-11-19 14:41:01,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 2397 transitions. [2021-11-19 14:41:01,142 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 2397 transitions. Word has length 166 [2021-11-19 14:41:01,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:01,143 INFO L470 AbstractCegarLoop]: Abstraction has 1513 states and 2397 transitions. [2021-11-19 14:41:01,143 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) [2021-11-19 14:41:01,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 2397 transitions. [2021-11-19 14:41:01,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-19 14:41:01,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:01,148 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] [2021-11-19 14:41:01,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:01,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2021-11-19 14:41:01,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2021-11-19 14:41:01,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:41:01,764 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:01,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:01,764 INFO L85 PathProgramCache]: Analyzing trace with hash 776281684, now seen corresponding path program 1 times [2021-11-19 14:41:01,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:01,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780614471] [2021-11-19 14:41:01,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:01,765 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:01,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:01,766 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:01,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-19 14:41:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:02,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:41:02,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:41:02,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:41:03,374 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:03,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780614471] [2021-11-19 14:41:03,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780614471] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:03,374 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:03,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 14:41:03,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361521732] [2021-11-19 14:41:03,375 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:03,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:41:03,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:03,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:41:03,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:41:03,377 INFO L87 Difference]: Start difference. First operand 1513 states and 2397 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) [2021-11-19 14:41:11,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:11,090 INFO L93 Difference]: Finished difference Result 5359 states and 8808 transitions. [2021-11-19 14:41:11,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:41:11,092 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 [2021-11-19 14:41:11,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:11,125 INFO L225 Difference]: With dead ends: 5359 [2021-11-19 14:41:11,125 INFO L226 Difference]: Without dead ends: 3924 [2021-11-19 14:41:11,135 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 [2021-11-19 14:41:11,135 INFO L933 BasicCegarLoop]: 1692 mSDtfsCounter, 4817 mSDsluCounter, 2557 mSDsCounter, 0 mSdLazyCounter, 6297 mSolverCounterSat, 1670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4917 SdHoareTripleChecker+Valid, 4249 SdHoareTripleChecker+Invalid, 7967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1670 IncrementalHoareTripleChecker+Valid, 6297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:11,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4917 Valid, 4249 Invalid, 7967 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1670 Valid, 6297 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2021-11-19 14:41:11,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3924 states. [2021-11-19 14:41:11,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3924 to 3470. [2021-11-19 14:41:11,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3470 states, 2576 states have (on average 1.5811335403726707) internal successors, (4073), 2717 states have internal predecessors, (4073), 728 states have call successors, (728), 152 states have call predecessors, (728), 165 states have return successors, (838), 722 states have call predecessors, (838), 724 states have call successors, (838) [2021-11-19 14:41:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 5639 transitions. [2021-11-19 14:41:11,572 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 5639 transitions. Word has length 168 [2021-11-19 14:41:11,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:11,572 INFO L470 AbstractCegarLoop]: Abstraction has 3470 states and 5639 transitions. [2021-11-19 14:41:11,573 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) [2021-11-19 14:41:11,573 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 5639 transitions. [2021-11-19 14:41:11,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-19 14:41:11,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:11,577 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] [2021-11-19 14:41:11,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:11,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:11,783 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:11,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:11,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1398398413, now seen corresponding path program 1 times [2021-11-19 14:41:11,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:11,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867606940] [2021-11-19 14:41:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:11,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:11,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:11,786 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:11,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-19 14:41:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:12,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:41:12,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:41:12,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:13,366 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:41:13,366 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:13,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867606940] [2021-11-19 14:41:13,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867606940] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:13,367 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:13,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 14:41:13,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554592718] [2021-11-19 14:41:13,367 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:13,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:41:13,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:13,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:41:13,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:41:13,369 INFO L87 Difference]: Start difference. First operand 3470 states and 5639 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) [2021-11-19 14:41:19,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:19,723 INFO L93 Difference]: Finished difference Result 9578 states and 15655 transitions. [2021-11-19 14:41:19,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 14:41:19,724 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 [2021-11-19 14:41:19,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:19,772 INFO L225 Difference]: With dead ends: 9578 [2021-11-19 14:41:19,773 INFO L226 Difference]: Without dead ends: 7005 [2021-11-19 14:41:19,787 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 [2021-11-19 14:41:19,788 INFO L933 BasicCegarLoop]: 1026 mSDtfsCounter, 3246 mSDsluCounter, 2163 mSDsCounter, 0 mSdLazyCounter, 5124 mSolverCounterSat, 682 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3320 SdHoareTripleChecker+Valid, 3189 SdHoareTripleChecker+Invalid, 5806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 682 IncrementalHoareTripleChecker+Valid, 5124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:19,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3320 Valid, 3189 Invalid, 5806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [682 Valid, 5124 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-11-19 14:41:19,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7005 states. [2021-11-19 14:41:20,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7005 to 6727. [2021-11-19 14:41:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6727 states, 5025 states have (on average 1.5749253731343285) internal successors, (7914), 5293 states have internal predecessors, (7914), 1350 states have call successors, (1350), 290 states have call predecessors, (1350), 351 states have return successors, (1677), 1345 states have call predecessors, (1677), 1346 states have call successors, (1677) [2021-11-19 14:41:20,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6727 states to 6727 states and 10941 transitions. [2021-11-19 14:41:20,509 INFO L78 Accepts]: Start accepts. Automaton has 6727 states and 10941 transitions. Word has length 168 [2021-11-19 14:41:20,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:20,510 INFO L470 AbstractCegarLoop]: Abstraction has 6727 states and 10941 transitions. [2021-11-19 14:41:20,511 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) [2021-11-19 14:41:20,511 INFO L276 IsEmpty]: Start isEmpty. Operand 6727 states and 10941 transitions. [2021-11-19 14:41:20,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-19 14:41:20,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:20,515 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] [2021-11-19 14:41:20,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:20,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:20,740 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:20,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:20,740 INFO L85 PathProgramCache]: Analyzing trace with hash 697507379, now seen corresponding path program 1 times [2021-11-19 14:41:20,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:20,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970853084] [2021-11-19 14:41:20,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:20,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:20,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:20,743 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:20,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-19 14:41:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:21,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 14:41:21,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:41:21,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:41:22,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:22,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970853084] [2021-11-19 14:41:22,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970853084] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:22,910 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:22,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 18 [2021-11-19 14:41:22,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793714663] [2021-11-19 14:41:22,910 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:22,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 14:41:22,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:22,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 14:41:22,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:41:22,912 INFO L87 Difference]: Start difference. First operand 6727 states and 10941 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) [2021-11-19 14:41:27,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:27,245 INFO L93 Difference]: Finished difference Result 12501 states and 20397 transitions. [2021-11-19 14:41:27,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:41:27,246 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 [2021-11-19 14:41:27,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:27,302 INFO L225 Difference]: With dead ends: 12501 [2021-11-19 14:41:27,302 INFO L226 Difference]: Without dead ends: 6679 [2021-11-19 14:41:27,329 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 [2021-11-19 14:41:27,330 INFO L933 BasicCegarLoop]: 759 mSDtfsCounter, 1428 mSDsluCounter, 2691 mSDsCounter, 0 mSdLazyCounter, 4798 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1428 SdHoareTripleChecker+Valid, 3450 SdHoareTripleChecker+Invalid, 5166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 4798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:27,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1428 Valid, 3450 Invalid, 5166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 4798 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-19 14:41:27,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6679 states. [2021-11-19 14:41:27,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6679 to 6679. [2021-11-19 14:41:27,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6679 states, 4999 states have (on average 1.575115023004601) internal successors, (7874), 5263 states have internal predecessors, (7874), 1336 states have call successors, (1336), 286 states have call predecessors, (1336), 343 states have return successors, (1655), 1331 states have call predecessors, (1655), 1332 states have call successors, (1655) [2021-11-19 14:41:28,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6679 states to 6679 states and 10865 transitions. [2021-11-19 14:41:28,035 INFO L78 Accepts]: Start accepts. Automaton has 6679 states and 10865 transitions. Word has length 170 [2021-11-19 14:41:28,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:28,036 INFO L470 AbstractCegarLoop]: Abstraction has 6679 states and 10865 transitions. [2021-11-19 14:41:28,037 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) [2021-11-19 14:41:28,037 INFO L276 IsEmpty]: Start isEmpty. Operand 6679 states and 10865 transitions. [2021-11-19 14:41:28,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-19 14:41:28,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:28,041 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] [2021-11-19 14:41:28,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:28,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:28,254 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:28,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:28,255 INFO L85 PathProgramCache]: Analyzing trace with hash 2058923736, now seen corresponding path program 1 times [2021-11-19 14:41:28,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:28,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501079745] [2021-11-19 14:41:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:28,256 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:28,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:28,257 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:28,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-19 14:41:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:28,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:41:28,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:41:29,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:41:30,382 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:30,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501079745] [2021-11-19 14:41:30,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501079745] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:30,382 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:30,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-19 14:41:30,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098955111] [2021-11-19 14:41:30,383 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:30,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:41:30,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:30,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:41:30,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:41:30,385 INFO L87 Difference]: Start difference. First operand 6679 states and 10865 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) [2021-11-19 14:41:37,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:37,422 INFO L93 Difference]: Finished difference Result 17733 states and 28871 transitions. [2021-11-19 14:41:37,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 14:41:37,424 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 [2021-11-19 14:41:37,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:37,509 INFO L225 Difference]: With dead ends: 17733 [2021-11-19 14:41:37,509 INFO L226 Difference]: Without dead ends: 11827 [2021-11-19 14:41:37,539 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 [2021-11-19 14:41:37,546 INFO L933 BasicCegarLoop]: 967 mSDtfsCounter, 3522 mSDsluCounter, 1911 mSDsCounter, 0 mSdLazyCounter, 5628 mSolverCounterSat, 928 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3599 SdHoareTripleChecker+Valid, 2878 SdHoareTripleChecker+Invalid, 6556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 928 IncrementalHoareTripleChecker+Valid, 5628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:37,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3599 Valid, 2878 Invalid, 6556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [928 Valid, 5628 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-11-19 14:41:37,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11827 states. [2021-11-19 14:41:38,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11827 to 11759. [2021-11-19 14:41:38,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11759 states, 8755 states have (on average 1.5607081667618503) internal successors, (13664), 9226 states have internal predecessors, (13664), 2368 states have call successors, (2368), 535 states have call predecessors, (2368), 635 states have return successors, (2981), 2357 states have call predecessors, (2981), 2364 states have call successors, (2981) [2021-11-19 14:41:38,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11759 states to 11759 states and 19013 transitions. [2021-11-19 14:41:38,464 INFO L78 Accepts]: Start accepts. Automaton has 11759 states and 19013 transitions. Word has length 173 [2021-11-19 14:41:38,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:38,465 INFO L470 AbstractCegarLoop]: Abstraction has 11759 states and 19013 transitions. [2021-11-19 14:41:38,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 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) [2021-11-19 14:41:38,465 INFO L276 IsEmpty]: Start isEmpty. Operand 11759 states and 19013 transitions. [2021-11-19 14:41:38,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-19 14:41:38,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:38,469 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] [2021-11-19 14:41:38,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:38,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:38,692 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:38,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:38,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1651518826, now seen corresponding path program 1 times [2021-11-19 14:41:38,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:38,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013809372] [2021-11-19 14:41:38,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:38,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:38,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:38,811 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:38,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-19 14:41:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:39,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:41:39,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:41:39,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:40,101 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:41:40,101 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:40,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013809372] [2021-11-19 14:41:40,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013809372] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:40,102 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:40,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 14:41:40,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703989233] [2021-11-19 14:41:40,102 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:40,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:41:40,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:40,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:41:40,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:41:40,104 INFO L87 Difference]: Start difference. First operand 11759 states and 19013 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) [2021-11-19 14:41:40,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:40,915 INFO L93 Difference]: Finished difference Result 23265 states and 37913 transitions. [2021-11-19 14:41:40,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:41:40,916 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 [2021-11-19 14:41:40,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:40,995 INFO L225 Difference]: With dead ends: 23265 [2021-11-19 14:41:40,995 INFO L226 Difference]: Without dead ends: 11759 [2021-11-19 14:41:41,039 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 [2021-11-19 14:41:41,040 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 604 mSDsluCounter, 2897 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 3781 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:41,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 3781 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:41:41,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11759 states. [2021-11-19 14:41:41,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11759 to 11759. [2021-11-19 14:41:41,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11759 states, 8755 states have (on average 1.546544831524843) internal successors, (13540), 9226 states have internal predecessors, (13540), 2368 states have call successors, (2368), 535 states have call predecessors, (2368), 635 states have return successors, (2981), 2357 states have call predecessors, (2981), 2364 states have call successors, (2981) [2021-11-19 14:41:41,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11759 states to 11759 states and 18889 transitions. [2021-11-19 14:41:41,993 INFO L78 Accepts]: Start accepts. Automaton has 11759 states and 18889 transitions. Word has length 180 [2021-11-19 14:41:41,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:41,994 INFO L470 AbstractCegarLoop]: Abstraction has 11759 states and 18889 transitions. [2021-11-19 14:41:41,994 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) [2021-11-19 14:41:41,994 INFO L276 IsEmpty]: Start isEmpty. Operand 11759 states and 18889 transitions. [2021-11-19 14:41:41,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-19 14:41:41,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:41,999 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] [2021-11-19 14:41:42,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:42,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:42,215 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:42,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:42,216 INFO L85 PathProgramCache]: Analyzing trace with hash -429316175, now seen corresponding path program 1 times [2021-11-19 14:41:42,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:42,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850166494] [2021-11-19 14:41:42,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:42,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:42,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:42,218 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:42,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-19 14:41:42,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:42,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:41:42,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-19 14:41:43,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-19 14:41:43,712 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:43,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850166494] [2021-11-19 14:41:43,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850166494] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:43,713 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:43,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-19 14:41:43,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947891923] [2021-11-19 14:41:43,713 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:43,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:41:43,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:43,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:41:43,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:41:43,715 INFO L87 Difference]: Start difference. First operand 11759 states and 18889 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) [2021-11-19 14:41:47,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:47,901 INFO L93 Difference]: Finished difference Result 23494 states and 37913 transitions. [2021-11-19 14:41:47,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:41:47,902 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 [2021-11-19 14:41:47,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:47,978 INFO L225 Difference]: With dead ends: 23494 [2021-11-19 14:41:47,978 INFO L226 Difference]: Without dead ends: 12821 [2021-11-19 14:41:48,020 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 [2021-11-19 14:41:48,020 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 3961 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 3137 mSolverCounterSat, 1077 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4040 SdHoareTripleChecker+Valid, 2137 SdHoareTripleChecker+Invalid, 4214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1077 IncrementalHoareTripleChecker+Valid, 3137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:48,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4040 Valid, 2137 Invalid, 4214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1077 Valid, 3137 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-19 14:41:48,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12821 states. [2021-11-19 14:41:48,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12821 to 12123. [2021-11-19 14:41:48,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12123 states, 9027 states have (on average 1.53938185443669) internal successors, (13896), 9518 states have internal predecessors, (13896), 2406 states have call successors, (2406), 571 states have call predecessors, (2406), 689 states have return successors, (3067), 2393 states have call predecessors, (3067), 2402 states have call successors, (3067) [2021-11-19 14:41:48,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12123 states to 12123 states and 19369 transitions. [2021-11-19 14:41:48,894 INFO L78 Accepts]: Start accepts. Automaton has 12123 states and 19369 transitions. Word has length 185 [2021-11-19 14:41:48,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:48,895 INFO L470 AbstractCegarLoop]: Abstraction has 12123 states and 19369 transitions. [2021-11-19 14:41:48,896 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) [2021-11-19 14:41:48,896 INFO L276 IsEmpty]: Start isEmpty. Operand 12123 states and 19369 transitions. [2021-11-19 14:41:48,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-19 14:41:48,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:48,900 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] [2021-11-19 14:41:48,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:49,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:49,115 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:49,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:49,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1129128741, now seen corresponding path program 1 times [2021-11-19 14:41:49,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:49,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793409424] [2021-11-19 14:41:49,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:49,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:49,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:49,119 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:49,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-19 14:41:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:49,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:41:49,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-19 14:41:50,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-19 14:41:50,844 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:50,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793409424] [2021-11-19 14:41:50,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793409424] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:50,844 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:50,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:41:50,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159136693] [2021-11-19 14:41:50,845 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:50,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:41:50,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:50,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:41:50,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:41:50,846 INFO L87 Difference]: Start difference. First operand 12123 states and 19369 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) [2021-11-19 14:41:58,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:58,987 INFO L93 Difference]: Finished difference Result 32462 states and 52373 transitions. [2021-11-19 14:41:58,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 14:41:58,988 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 [2021-11-19 14:41:58,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:59,085 INFO L225 Difference]: With dead ends: 32462 [2021-11-19 14:41:59,085 INFO L226 Difference]: Without dead ends: 21422 [2021-11-19 14:41:59,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-19 14:41:59,120 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 3704 mSDsluCounter, 2519 mSDsCounter, 0 mSdLazyCounter, 6669 mSolverCounterSat, 1033 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3778 SdHoareTripleChecker+Valid, 3379 SdHoareTripleChecker+Invalid, 7702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1033 IncrementalHoareTripleChecker+Valid, 6669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:59,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3778 Valid, 3379 Invalid, 7702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1033 Valid, 6669 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2021-11-19 14:41:59,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21422 states. [2021-11-19 14:42:00,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21422 to 21342. [2021-11-19 14:42:00,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21342 states, 15852 states have (on average 1.545987887963664) internal successors, (24507), 16693 states have internal predecessors, (24507), 4326 states have call successors, (4326), 1032 states have call predecessors, (4326), 1163 states have return successors, (5418), 4296 states have call predecessors, (5418), 4322 states have call successors, (5418) [2021-11-19 14:42:01,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21342 states to 21342 states and 34251 transitions. [2021-11-19 14:42:01,053 INFO L78 Accepts]: Start accepts. Automaton has 21342 states and 34251 transitions. Word has length 190 [2021-11-19 14:42:01,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:42:01,054 INFO L470 AbstractCegarLoop]: Abstraction has 21342 states and 34251 transitions. [2021-11-19 14:42:01,054 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) [2021-11-19 14:42:01,054 INFO L276 IsEmpty]: Start isEmpty. Operand 21342 states and 34251 transitions. [2021-11-19 14:42:01,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-19 14:42:01,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:42:01,060 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] [2021-11-19 14:42:01,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-19 14:42:01,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:42:01,283 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:42:01,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:42:01,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1779635161, now seen corresponding path program 1 times [2021-11-19 14:42:01,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:42:01,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310188917] [2021-11-19 14:42:01,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:42:01,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:42:01,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:42:01,285 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:42:01,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-19 14:42:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:42:01,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:42:01,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:42:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:42:02,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:42:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:42:03,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:42:03,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310188917] [2021-11-19 14:42:03,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310188917] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:42:03,196 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:42:03,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2021-11-19 14:42:03,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429306048] [2021-11-19 14:42:03,197 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:42:03,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 14:42:03,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:42:03,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 14:42:03,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:42:03,198 INFO L87 Difference]: Start difference. First operand 21342 states and 34251 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) [2021-11-19 14:42:13,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:42:13,319 INFO L93 Difference]: Finished difference Result 56448 states and 93028 transitions. [2021-11-19 14:42:13,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-19 14:42:13,321 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 [2021-11-19 14:42:13,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:42:13,660 INFO L225 Difference]: With dead ends: 56448 [2021-11-19 14:42:13,660 INFO L226 Difference]: Without dead ends: 33612 [2021-11-19 14:42:13,770 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 [2021-11-19 14:42:13,771 INFO L933 BasicCegarLoop]: 1044 mSDtfsCounter, 3589 mSDsluCounter, 3326 mSDsCounter, 0 mSdLazyCounter, 8314 mSolverCounterSat, 1017 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3688 SdHoareTripleChecker+Valid, 4370 SdHoareTripleChecker+Invalid, 9331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1017 IncrementalHoareTripleChecker+Valid, 8314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:42:13,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3688 Valid, 4370 Invalid, 9331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1017 Valid, 8314 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2021-11-19 14:42:13,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33612 states. [2021-11-19 14:42:16,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33612 to 31968. [2021-11-19 14:42:16,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31968 states, 23732 states have (on average 1.5381341648407214) internal successors, (36503), 25046 states have internal predecessors, (36503), 6470 states have call successors, (6470), 1583 states have call predecessors, (6470), 1765 states have return successors, (8270), 6338 states have call predecessors, (8270), 6466 states have call successors, (8270) [2021-11-19 14:42:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31968 states to 31968 states and 51243 transitions. [2021-11-19 14:42:16,543 INFO L78 Accepts]: Start accepts. Automaton has 31968 states and 51243 transitions. Word has length 190 [2021-11-19 14:42:16,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:42:16,544 INFO L470 AbstractCegarLoop]: Abstraction has 31968 states and 51243 transitions. [2021-11-19 14:42:16,544 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) [2021-11-19 14:42:16,545 INFO L276 IsEmpty]: Start isEmpty. Operand 31968 states and 51243 transitions. [2021-11-19 14:42:16,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-19 14:42:16,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:42:16,549 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] [2021-11-19 14:42:16,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-19 14:42:16,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:42:16,750 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:42:16,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:42:16,750 INFO L85 PathProgramCache]: Analyzing trace with hash 902028657, now seen corresponding path program 1 times [2021-11-19 14:42:16,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:42:16,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54737980] [2021-11-19 14:42:16,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:42:16,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:42:16,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:42:16,752 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:42:16,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-19 14:42:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:42:17,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:42:17,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:42:17,510 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 14:42:17,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:42:18,352 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 14:42:18,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:42:18,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54737980] [2021-11-19 14:42:18,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54737980] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:42:18,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [582678527] [2021-11-19 14:42:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:42:18,353 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:42:18,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:42:18,354 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:42:18,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-11-19 14:42:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:42:18,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:42:18,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:42:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:42:19,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:42:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:42:19,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [582678527] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:42:19,455 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:42:19,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-19 14:42:19,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909425135] [2021-11-19 14:42:19,456 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:42:19,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:42:19,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:42:19,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:42:19,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:42:19,458 INFO L87 Difference]: Start difference. First operand 31968 states and 51243 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) [2021-11-19 14:42:24,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:42:24,098 INFO L93 Difference]: Finished difference Result 95284 states and 154037 transitions. [2021-11-19 14:42:24,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:42:24,099 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 [2021-11-19 14:42:24,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:42:24,890 INFO L225 Difference]: With dead ends: 95284 [2021-11-19 14:42:24,891 INFO L226 Difference]: Without dead ends: 63395 [2021-11-19 14:42:25,014 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 [2021-11-19 14:42:25,015 INFO L933 BasicCegarLoop]: 1452 mSDtfsCounter, 783 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 2254 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:42:25,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 2254 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:42:25,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63395 states. [2021-11-19 14:42:29,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63395 to 62697. [2021-11-19 14:42:29,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62697 states, 46564 states have (on average 1.5335667038914182) internal successors, (71409), 49140 states have internal predecessors, (71409), 12632 states have call successors, (12632), 3134 states have call predecessors, (12632), 3500 states have return successors, (16862), 12422 states have call predecessors, (16862), 12628 states have call successors, (16862) [2021-11-19 14:42:30,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62697 states to 62697 states and 100903 transitions. [2021-11-19 14:42:30,298 INFO L78 Accepts]: Start accepts. Automaton has 62697 states and 100903 transitions. Word has length 191 [2021-11-19 14:42:30,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:42:30,298 INFO L470 AbstractCegarLoop]: Abstraction has 62697 states and 100903 transitions. [2021-11-19 14:42:30,298 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) [2021-11-19 14:42:30,298 INFO L276 IsEmpty]: Start isEmpty. Operand 62697 states and 100903 transitions. [2021-11-19 14:42:30,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-19 14:42:30,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:42:30,303 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] [2021-11-19 14:42:30,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2021-11-19 14:42:30,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-19 14:42:30,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:42:30,704 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:42:30,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:42:30,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2102022764, now seen corresponding path program 1 times [2021-11-19 14:42:30,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:42:30,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025401943] [2021-11-19 14:42:30,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:42:30,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:42:30,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:42:30,706 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:42:30,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-19 14:42:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:42:31,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:42:31,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:42:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 14:42:31,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:42:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 14:42:32,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:42:32,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025401943] [2021-11-19 14:42:32,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025401943] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:42:32,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [507568903] [2021-11-19 14:42:32,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:42:32,043 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:42:32,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:42:32,044 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:42:32,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2021-11-19 14:42:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:42:32,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 14:42:32,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:42:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 14:42:32,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:42:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 14:42:33,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [507568903] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:42:33,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856301341] [2021-11-19 14:42:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:42:33,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:42:33,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:42:33,338 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:42:33,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51942b12-c3de-4f71-acca-8574a79a37e2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-19 14:42:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:42:33,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:42:33,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:42:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 14:42:33,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:42:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 14:42:34,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856301341] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:42:34,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:42:34,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 4, 5, 5] total 9 [2021-11-19 14:42:34,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77892660] [2021-11-19 14:42:34,568 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:42:34,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:42:34,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:42:34,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:42:34,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:42:34,569 INFO L87 Difference]: Start difference. First operand 62697 states and 100903 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) [2021-11-19 14:42:41,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:42:41,618 INFO L93 Difference]: Finished difference Result 95906 states and 154242 transitions. [2021-11-19 14:42:41,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:42:41,618 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 [2021-11-19 14:42:41,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:42:42,120 INFO L225 Difference]: With dead ends: 95906 [2021-11-19 14:42:42,120 INFO L226 Difference]: Without dead ends: 65169 [2021-11-19 14:42:42,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1149 GetRequests, 1140 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:42:42,222 INFO L933 BasicCegarLoop]: 942 mSDtfsCounter, 2309 mSDsluCounter, 1252 mSDsCounter, 0 mSdLazyCounter, 3154 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2383 SdHoareTripleChecker+Valid, 2194 SdHoareTripleChecker+Invalid, 3746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 3154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:42:42,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2383 Valid, 2194 Invalid, 3746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 3154 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-19 14:42:42,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65169 states.