./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec1_productSimulator.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c2ee13e5ae0bbed1c37b7eadefb29cbd7041f4c5e0d498dc3d4ea1e000526be8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:53:42,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:53:42,936 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:53:42,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:53:42,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:53:42,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:53:42,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:53:43,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:53:43,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:53:43,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:53:43,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:53:43,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:53:43,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:53:43,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:53:43,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:53:43,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:53:43,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:53:43,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:53:43,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:53:43,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:53:43,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:53:43,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:53:43,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:53:43,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:53:43,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:53:43,055 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:53:43,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:53:43,057 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:53:43,058 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:53:43,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:53:43,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:53:43,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:53:43,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:53:43,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:53:43,065 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:53:43,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:53:43,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:53:43,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:53:43,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:53:43,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:53:43,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:53:43,069 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:53:43,112 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:53:43,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:53:43,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:53:43,114 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:53:43,114 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:53:43,114 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:53:43,115 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:53:43,115 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:53:43,118 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:53:43,118 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:53:43,119 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:53:43,120 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:53:43,120 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:53:43,120 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:53:43,120 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:53:43,120 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:53:43,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:53:43,121 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:53:43,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:53:43,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:53:43,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:53:43,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:53:43,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:53:43,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:53:43,123 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:53:43,123 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:53:43,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:53:43,123 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:53:43,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:53:43,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:53:43,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:53:43,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:53:43,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:53:43,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:53:43,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:53:43,126 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:53:43,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:53:43,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:53:43,127 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:53:43,127 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:53:43,127 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_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2ee13e5ae0bbed1c37b7eadefb29cbd7041f4c5e0d498dc3d4ea1e000526be8 [2021-11-12 22:53:43,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:53:43,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:53:43,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:53:43,479 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:53:43,480 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:53:43,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/email_spec1_productSimulator.cil.c [2021-11-12 22:53:43,554 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/data/abf2bbbe0/59dd1d577cfd43628ed6a7656253ce0c/FLAGb6cc332d2 [2021-11-12 22:53:44,271 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:53:44,272 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/sv-benchmarks/c/product-lines/email_spec1_productSimulator.cil.c [2021-11-12 22:53:44,297 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/data/abf2bbbe0/59dd1d577cfd43628ed6a7656253ce0c/FLAGb6cc332d2 [2021-11-12 22:53:44,431 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/data/abf2bbbe0/59dd1d577cfd43628ed6a7656253ce0c [2021-11-12 22:53:44,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:53:44,436 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:53:44,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:53:44,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:53:44,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:53:44,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:53:44" (1/1) ... [2021-11-12 22:53:44,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dba469c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:44, skipping insertion in model container [2021-11-12 22:53:44,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:53:44" (1/1) ... [2021-11-12 22:53:44,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:53:44,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:53:45,048 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/sv-benchmarks/c/product-lines/email_spec1_productSimulator.cil.c[35789,35802] [2021-11-12 22:53:45,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:53:45,164 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:53:45,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@25c35123 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:45, skipping insertion in model container [2021-11-12 22:53:45,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:53:45,167 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:53:45,170 INFO L158 Benchmark]: Toolchain (without parser) took 732.72ms. Allocated memory is still 90.2MB. Free memory was 66.1MB in the beginning and 49.0MB in the end (delta: 17.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-12 22:53:45,171 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 90.2MB. Free memory was 65.6MB in the beginning and 65.6MB in the end (delta: 79.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:53:45,173 INFO L158 Benchmark]: CACSL2BoogieTranslator took 730.01ms. Allocated memory is still 90.2MB. Free memory was 65.8MB in the beginning and 49.0MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-12 22:53:45,175 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 90.2MB. Free memory was 65.6MB in the beginning and 65.6MB in the end (delta: 79.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 730.01ms. Allocated memory is still 90.2MB. Free memory was 65.8MB in the beginning and 49.0MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1953]: 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_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c2ee13e5ae0bbed1c37b7eadefb29cbd7041f4c5e0d498dc3d4ea1e000526be8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:53:47,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:53:47,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:53:47,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:53:47,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:53:47,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:53:47,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:53:47,548 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:53:47,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:53:47,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:53:47,560 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:53:47,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:53:47,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:53:47,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:53:47,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:53:47,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:53:47,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:53:47,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:53:47,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:53:47,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:53:47,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:53:47,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:53:47,589 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:53:47,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:53:47,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:53:47,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:53:47,600 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:53:47,602 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:53:47,603 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:53:47,604 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:53:47,604 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:53:47,605 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:53:47,607 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:53:47,608 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:53:47,609 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:53:47,610 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:53:47,610 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:53:47,611 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:53:47,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:53:47,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:53:47,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:53:47,614 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:53:47,663 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:53:47,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:53:47,664 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:53:47,664 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:53:47,665 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:53:47,665 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:53:47,665 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:53:47,665 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:53:47,666 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:53:47,666 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:53:47,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:53:47,668 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:53:47,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:53:47,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:53:47,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:53:47,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:53:47,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:53:47,669 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:53:47,670 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:53:47,670 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:53:47,670 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:53:47,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:53:47,670 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:53:47,671 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:53:47,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:53:47,671 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:53:47,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:53:47,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:53:47,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:53:47,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:53:47,672 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:53:47,672 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:53:47,673 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:47,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:53:47,673 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:53:47,674 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:53:47,674 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_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2ee13e5ae0bbed1c37b7eadefb29cbd7041f4c5e0d498dc3d4ea1e000526be8 [2021-11-12 22:53:48,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:53:48,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:53:48,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:53:48,039 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:53:48,040 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:53:48,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/email_spec1_productSimulator.cil.c [2021-11-12 22:53:48,099 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/data/744d33f4c/26195582835c4b8899a2474c0a7c54c4/FLAG7bac7bad0 [2021-11-12 22:53:48,865 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:53:48,866 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/sv-benchmarks/c/product-lines/email_spec1_productSimulator.cil.c [2021-11-12 22:53:48,905 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/data/744d33f4c/26195582835c4b8899a2474c0a7c54c4/FLAG7bac7bad0 [2021-11-12 22:53:48,970 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/data/744d33f4c/26195582835c4b8899a2474c0a7c54c4 [2021-11-12 22:53:48,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:53:48,977 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:53:48,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:53:48,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:53:48,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:53:48,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:53:48" (1/1) ... [2021-11-12 22:53:48,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57b50d6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:48, skipping insertion in model container [2021-11-12 22:53:48,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:53:48" (1/1) ... [2021-11-12 22:53:48,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:53:49,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:53:49,838 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/sv-benchmarks/c/product-lines/email_spec1_productSimulator.cil.c[35789,35802] [2021-11-12 22:53:49,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:53:50,006 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:53:50,031 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:53:50,119 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/sv-benchmarks/c/product-lines/email_spec1_productSimulator.cil.c[35789,35802] [2021-11-12 22:53:50,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:53:50,192 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:53:50,280 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/sv-benchmarks/c/product-lines/email_spec1_productSimulator.cil.c[35789,35802] [2021-11-12 22:53:50,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:53:50,392 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:53:50,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:50 WrapperNode [2021-11-12 22:53:50,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:53:50,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:53:50,394 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:53:50,394 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:53:50,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:50" (1/1) ... [2021-11-12 22:53:50,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:50" (1/1) ... [2021-11-12 22:53:50,601 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:53:50,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:53:50,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:53:50,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:53:50,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:50" (1/1) ... [2021-11-12 22:53:50,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:50" (1/1) ... [2021-11-12 22:53:50,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:50" (1/1) ... [2021-11-12 22:53:50,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:50" (1/1) ... [2021-11-12 22:53:50,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:50" (1/1) ... [2021-11-12 22:53:50,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:50" (1/1) ... [2021-11-12 22:53:50,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:50" (1/1) ... [2021-11-12 22:53:50,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:53:50,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:53:50,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:53:50,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:53:50,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:50" (1/1) ... [2021-11-12 22:53:50,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:53:50,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:53:50,771 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:53:50,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:53:50,818 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2021-11-12 22:53:50,818 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2021-11-12 22:53:50,818 INFO L130 BoogieDeclarations]: Found specification of procedure setup_chuck__before__Keys [2021-11-12 22:53:50,818 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_chuck__before__Keys [2021-11-12 22:53:50,818 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Sign [2021-11-12 22:53:50,818 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Sign [2021-11-12 22:53:50,818 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookSize [2021-11-12 22:53:50,819 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookSize [2021-11-12 22:53:50,819 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2021-11-12 22:53:50,819 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2021-11-12 22:53:50,819 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookAddress [2021-11-12 22:53:50,819 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookAddress [2021-11-12 22:53:50,819 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2021-11-12 22:53:50,819 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2021-11-12 22:53:50,820 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Verify [2021-11-12 22:53:50,820 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Verify [2021-11-12 22:53:50,820 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-11-12 22:53:50,820 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-11-12 22:53:50,820 INFO L130 BoogieDeclarations]: Found specification of procedure setup_bob__before__Keys [2021-11-12 22:53:50,820 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_bob__before__Keys [2021-11-12 22:53:50,820 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-11-12 22:53:50,820 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-11-12 22:53:50,820 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-11-12 22:53:50,821 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-11-12 22:53:50,821 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2021-11-12 22:53:50,821 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2021-11-12 22:53:50,821 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Decrypt [2021-11-12 22:53:50,821 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Decrypt [2021-11-12 22:53:50,821 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Encrypt [2021-11-12 22:53:50,821 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Encrypt [2021-11-12 22:53:50,821 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2021-11-12 22:53:50,822 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2021-11-12 22:53:50,822 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2021-11-12 22:53:50,822 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2021-11-12 22:53:50,822 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2021-11-12 22:53:50,822 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2021-11-12 22:53:50,822 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-12 22:53:50,822 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Forward [2021-11-12 22:53:50,822 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Forward [2021-11-12 22:53:50,823 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2021-11-12 22:53:50,823 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2021-11-12 22:53:50,823 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2021-11-12 22:53:50,823 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2021-11-12 22:53:50,823 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-11-12 22:53:50,823 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-11-12 22:53:50,823 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable__before__Encrypt [2021-11-12 22:53:50,823 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable__before__Encrypt [2021-11-12 22:53:50,824 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2021-11-12 22:53:50,824 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2021-11-12 22:53:50,824 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2021-11-12 22:53:50,824 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2021-11-12 22:53:50,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:53:50,824 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__AddressBook [2021-11-12 22:53:50,824 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__AddressBook [2021-11-12 22:53:50,824 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Encrypt [2021-11-12 22:53:50,824 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Encrypt [2021-11-12 22:53:50,825 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__AutoResponder [2021-11-12 22:53:50,825 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__AutoResponder [2021-11-12 22:53:50,825 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookSize [2021-11-12 22:53:50,825 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookSize [2021-11-12 22:53:50,825 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2021-11-12 22:53:50,825 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2021-11-12 22:53:50,825 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2021-11-12 22:53:50,825 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2021-11-12 22:53:50,825 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-11-12 22:53:50,826 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-11-12 22:53:50,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:53:50,826 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2021-11-12 22:53:50,826 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2021-11-12 22:53:50,826 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-11-12 22:53:50,826 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-11-12 22:53:50,826 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2021-11-12 22:53:50,826 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2021-11-12 22:53:50,827 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rjh__before__Keys [2021-11-12 22:53:50,827 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rjh__before__Keys [2021-11-12 22:53:50,827 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Verify [2021-11-12 22:53:50,827 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Verify [2021-11-12 22:53:50,827 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2021-11-12 22:53:50,827 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2021-11-12 22:53:50,827 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-11-12 22:53:50,827 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-11-12 22:53:50,827 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2021-11-12 22:53:50,828 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2021-11-12 22:53:50,828 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Sign [2021-11-12 22:53:50,828 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Sign [2021-11-12 22:53:50,828 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2021-11-12 22:53:50,828 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2021-11-12 22:53:50,828 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookAddress [2021-11-12 22:53:50,828 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookAddress [2021-11-12 22:53:50,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:53:50,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:53:54,981 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:53:54,982 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:53:54,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:53:54 BoogieIcfgContainer [2021-11-12 22:53:54,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:53:54,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:53:54,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:53:54,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:53:54,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:53:48" (1/3) ... [2021-11-12 22:53:54,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b4de4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:53:54, skipping insertion in model container [2021-11-12 22:53:54,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:50" (2/3) ... [2021-11-12 22:53:54,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b4de4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:53:54, skipping insertion in model container [2021-11-12 22:53:54,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:53:54" (3/3) ... [2021-11-12 22:53:54,994 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec1_productSimulator.cil.c [2021-11-12 22:53:55,000 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:53:55,000 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:53:55,057 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:53:55,064 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:53:55,064 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:53:55,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 603 states, 448 states have (on average 1.515625) internal successors, (679), 468 states have internal predecessors, (679), 110 states have call successors, (110), 43 states have call predecessors, (110), 43 states have return successors, (110), 109 states have call predecessors, (110), 110 states have call successors, (110) [2021-11-12 22:53:55,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 22:53:55,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:55,125 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:55,126 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:55,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:55,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1563756112, now seen corresponding path program 1 times [2021-11-12 22:53:55,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:55,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116751514] [2021-11-12 22:53:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:55,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:55,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:55,151 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:55,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:53:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:55,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:53:55,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:53:56,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:53:56,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:56,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116751514] [2021-11-12 22:53:56,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116751514] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:56,415 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:56,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:53:56,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884788839] [2021-11-12 22:53:56,417 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:56,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:53:56,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:56,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:53:56,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:53:56,457 INFO L87 Difference]: Start difference. First operand has 603 states, 448 states have (on average 1.515625) internal successors, (679), 468 states have internal predecessors, (679), 110 states have call successors, (110), 43 states have call predecessors, (110), 43 states have return successors, (110), 109 states have call predecessors, (110), 110 states have call successors, (110) 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, (27), 2 states have call predecessors, (27), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-12 22:53:56,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:56,588 INFO L93 Difference]: Finished difference Result 937 states and 1377 transitions. [2021-11-12 22:53:56,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:53:56,590 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, (27), 2 states have call predecessors, (27), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 127 [2021-11-12 22:53:56,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:56,619 INFO L225 Difference]: With dead ends: 937 [2021-11-12 22:53:56,620 INFO L226 Difference]: Without dead ends: 596 [2021-11-12 22:53:56,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:53:56,642 INFO L933 BasicCegarLoop]: 895 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.94ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:56,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 9.94ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:53:56,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-11-12 22:53:56,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2021-11-12 22:53:56,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 442 states have (on average 1.51131221719457) internal successors, (668), 461 states have internal predecessors, (668), 110 states have call successors, (110), 43 states have call predecessors, (110), 43 states have return successors, (109), 108 states have call predecessors, (109), 109 states have call successors, (109) [2021-11-12 22:53:56,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 887 transitions. [2021-11-12 22:53:56,790 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 887 transitions. Word has length 127 [2021-11-12 22:53:56,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:56,792 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 887 transitions. [2021-11-12 22:53:56,793 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, (27), 2 states have call predecessors, (27), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-12 22:53:56,793 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 887 transitions. [2021-11-12 22:53:56,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 22:53:56,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:56,830 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:56,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:57,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:57,049 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:57,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:57,049 INFO L85 PathProgramCache]: Analyzing trace with hash 445600766, now seen corresponding path program 1 times [2021-11-12 22:53:57,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:57,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130419675] [2021-11-12 22:53:57,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:57,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:57,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:57,052 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:57,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:53:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:57,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:53:57,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:53:57,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:53:58,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:58,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130419675] [2021-11-12 22:53:58,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130419675] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:58,193 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:58,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-12 22:53:58,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601890564] [2021-11-12 22:53:58,194 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:58,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:58,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:58,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:58,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:53:58,197 INFO L87 Difference]: Start difference. First operand 596 states and 887 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 22:53:58,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:58,300 INFO L93 Difference]: Finished difference Result 1156 states and 1718 transitions. [2021-11-12 22:53:58,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:53:58,300 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 128 [2021-11-12 22:53:58,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:58,307 INFO L225 Difference]: With dead ends: 1156 [2021-11-12 22:53:58,307 INFO L226 Difference]: Without dead ends: 596 [2021-11-12 22:53:58,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:53:58,311 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 3 mSDsluCounter, 2644 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3529 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.88ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.13ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:58,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 3529 Invalid, 18 Unknown, 0 Unchecked, 14.88ms Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 20.13ms Time] [2021-11-12 22:53:58,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-11-12 22:53:58,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2021-11-12 22:53:58,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 442 states have (on average 1.495475113122172) internal successors, (661), 461 states have internal predecessors, (661), 110 states have call successors, (110), 43 states have call predecessors, (110), 43 states have return successors, (109), 108 states have call predecessors, (109), 109 states have call successors, (109) [2021-11-12 22:53:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 880 transitions. [2021-11-12 22:53:58,344 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 880 transitions. Word has length 128 [2021-11-12 22:53:58,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:58,345 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 880 transitions. [2021-11-12 22:53:58,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 22:53:58,345 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 880 transitions. [2021-11-12 22:53:58,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-12 22:53:58,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:58,349 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:58,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:58,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:58,563 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:58,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:58,564 INFO L85 PathProgramCache]: Analyzing trace with hash -189778846, now seen corresponding path program 1 times [2021-11-12 22:53:58,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:58,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743594602] [2021-11-12 22:53:58,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:58,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:58,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:58,567 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:58,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:53:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:59,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:53:59,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-12 22:53:59,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:53:59,829 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:59,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743594602] [2021-11-12 22:53:59,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743594602] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:59,829 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:59,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:53:59,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913902924] [2021-11-12 22:53:59,830 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:59,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:53:59,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:59,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:53:59,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:53:59,832 INFO L87 Difference]: Start difference. First operand 596 states and 880 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 4 states have call successors, (43), 4 states have call predecessors, (43), 3 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-12 22:54:01,867 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:02,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:02,008 INFO L93 Difference]: Finished difference Result 1166 states and 1742 transitions. [2021-11-12 22:54:02,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:02,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 4 states have call successors, (43), 4 states have call predecessors, (43), 3 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) Word has length 133 [2021-11-12 22:54:02,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:02,021 INFO L225 Difference]: With dead ends: 1166 [2021-11-12 22:54:02,022 INFO L226 Difference]: Without dead ends: 595 [2021-11-12 22:54:02,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:54:02,029 INFO L933 BasicCegarLoop]: 864 mSDtfsCounter, 794 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 21 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2063.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.86ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2094.56ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:02,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [794 Valid, 882 Invalid, 28 Unknown, 0 Unchecked, 8.86ms Time], IncrementalHoareTripleChecker [21 Valid, 6 Invalid, 1 Unknown, 0 Unchecked, 2094.56ms Time] [2021-11-12 22:54:02,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-12 22:54:02,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2021-11-12 22:54:02,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 443 states have (on average 1.4830699774266365) internal successors, (657), 460 states have internal predecessors, (657), 107 states have call successors, (107), 44 states have call predecessors, (107), 44 states have return successors, (106), 105 states have call predecessors, (106), 106 states have call successors, (106) [2021-11-12 22:54:02,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 870 transitions. [2021-11-12 22:54:02,094 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 870 transitions. Word has length 133 [2021-11-12 22:54:02,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:02,095 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 870 transitions. [2021-11-12 22:54:02,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 4 states have call successors, (43), 4 states have call predecessors, (43), 3 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-12 22:54:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 870 transitions. [2021-11-12 22:54:02,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-12 22:54:02,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:02,104 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:02,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:02,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:02,323 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:02,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:02,324 INFO L85 PathProgramCache]: Analyzing trace with hash -630937457, now seen corresponding path program 1 times [2021-11-12 22:54:02,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:02,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287311241] [2021-11-12 22:54:02,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:02,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:02,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:02,327 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:02,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:54:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:02,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:02,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:54:03,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:54:03,527 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:03,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287311241] [2021-11-12 22:54:03,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287311241] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:03,528 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:03,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:03,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759218169] [2021-11-12 22:54:03,529 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:03,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:03,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:03,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:03,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:03,535 INFO L87 Difference]: Start difference. First operand 595 states and 870 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-12 22:54:05,574 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:05,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:05,639 INFO L93 Difference]: Finished difference Result 1159 states and 1710 transitions. [2021-11-12 22:54:05,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:05,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 149 [2021-11-12 22:54:05,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:05,645 INFO L225 Difference]: With dead ends: 1159 [2021-11-12 22:54:05,645 INFO L226 Difference]: Without dead ends: 594 [2021-11-12 22:54:05,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:05,649 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 832 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2041.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.55ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2053.63ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:05,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 891 Invalid, 5 Unknown, 0 Unchecked, 5.55ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 1 Unknown, 0 Unchecked, 2053.63ms Time] [2021-11-12 22:54:05,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-12 22:54:05,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 594. [2021-11-12 22:54:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 443 states have (on average 1.4785553047404063) internal successors, (655), 459 states have internal predecessors, (655), 106 states have call successors, (106), 44 states have call predecessors, (106), 44 states have return successors, (105), 104 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 22:54:05,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 866 transitions. [2021-11-12 22:54:05,685 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 866 transitions. Word has length 149 [2021-11-12 22:54:05,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:05,686 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 866 transitions. [2021-11-12 22:54:05,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-12 22:54:05,687 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 866 transitions. [2021-11-12 22:54:05,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-12 22:54:05,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:05,690 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:05,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:05,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:05,904 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:05,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:05,904 INFO L85 PathProgramCache]: Analyzing trace with hash -2127050370, now seen corresponding path program 1 times [2021-11-12 22:54:05,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:05,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985365658] [2021-11-12 22:54:05,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:05,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:05,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:05,907 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:05,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:54:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:06,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:06,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:54:06,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:54:07,103 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:07,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985365658] [2021-11-12 22:54:07,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985365658] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:07,103 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:07,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:07,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453520595] [2021-11-12 22:54:07,104 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:07,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:07,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:07,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:07,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:07,105 INFO L87 Difference]: Start difference. First operand 594 states and 866 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-12 22:54:09,144 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:09,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:09,250 INFO L93 Difference]: Finished difference Result 1139 states and 1668 transitions. [2021-11-12 22:54:09,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:09,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 150 [2021-11-12 22:54:09,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:09,258 INFO L225 Difference]: With dead ends: 1139 [2021-11-12 22:54:09,258 INFO L226 Difference]: Without dead ends: 591 [2021-11-12 22:54:09,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:09,262 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 804 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2064.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.57ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2084.99ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:09,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 868 Invalid, 24 Unknown, 0 Unchecked, 6.57ms Time], IncrementalHoareTripleChecker [10 Valid, 13 Invalid, 1 Unknown, 0 Unchecked, 2084.99ms Time] [2021-11-12 22:54:09,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-12 22:54:09,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 591. [2021-11-12 22:54:09,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 443 states have (on average 1.4537246049661399) internal successors, (644), 454 states have internal predecessors, (644), 103 states have call successors, (103), 44 states have call predecessors, (103), 44 states have return successors, (102), 101 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-12 22:54:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 849 transitions. [2021-11-12 22:54:09,308 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 849 transitions. Word has length 150 [2021-11-12 22:54:09,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:09,311 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 849 transitions. [2021-11-12 22:54:09,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-12 22:54:09,312 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 849 transitions. [2021-11-12 22:54:09,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-12 22:54:09,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:09,320 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:09,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:09,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:09,533 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:09,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:09,534 INFO L85 PathProgramCache]: Analyzing trace with hash -2040504776, now seen corresponding path program 1 times [2021-11-12 22:54:09,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:09,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136222412] [2021-11-12 22:54:09,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:09,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:09,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:09,537 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:09,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:54:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:10,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:54:10,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-12 22:54:10,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-12 22:54:10,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:10,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136222412] [2021-11-12 22:54:10,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136222412] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:54:10,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:54:10,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2021-11-12 22:54:10,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194017335] [2021-11-12 22:54:10,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:10,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:54:10,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:10,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:54:10,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:54:10,969 INFO L87 Difference]: Start difference. First operand 591 states and 849 transitions. Second operand has 8 states, 6 states have (on average 16.166666666666668) internal successors, (97), 8 states have internal predecessors, (97), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 22:54:11,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:11,270 INFO L93 Difference]: Finished difference Result 1129 states and 1635 transitions. [2021-11-12 22:54:11,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:54:11,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 16.166666666666668) internal successors, (97), 8 states have internal predecessors, (97), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) Word has length 168 [2021-11-12 22:54:11,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:11,276 INFO L225 Difference]: With dead ends: 1129 [2021-11-12 22:54:11,276 INFO L226 Difference]: Without dead ends: 593 [2021-11-12 22:54:11,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:54:11,280 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 363 mSDsluCounter, 4607 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 137.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 5443 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.18ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 162.94ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:11,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 5443 Invalid, 119 Unknown, 0 Unchecked, 15.18ms Time], IncrementalHoareTripleChecker [44 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 162.94ms Time] [2021-11-12 22:54:11,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-11-12 22:54:11,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2021-11-12 22:54:11,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 444 states have (on average 1.4527027027027026) internal successors, (645), 456 states have internal predecessors, (645), 103 states have call successors, (103), 44 states have call predecessors, (103), 45 states have return successors, (104), 101 states have call predecessors, (104), 102 states have call successors, (104) [2021-11-12 22:54:11,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 852 transitions. [2021-11-12 22:54:11,330 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 852 transitions. Word has length 168 [2021-11-12 22:54:11,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:11,330 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 852 transitions. [2021-11-12 22:54:11,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 16.166666666666668) internal successors, (97), 8 states have internal predecessors, (97), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 22:54:11,331 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 852 transitions. [2021-11-12 22:54:11,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-12 22:54:11,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:11,335 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:11,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:11,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:11,552 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:11,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:11,552 INFO L85 PathProgramCache]: Analyzing trace with hash -35938023, now seen corresponding path program 1 times [2021-11-12 22:54:11,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:11,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091399937] [2021-11-12 22:54:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:11,553 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:11,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:11,554 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:11,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:54:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:11,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:54:11,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-12 22:54:12,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-12 22:54:12,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:12,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091399937] [2021-11-12 22:54:12,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091399937] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:54:12,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:54:12,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-12 22:54:12,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968211656] [2021-11-12 22:54:12,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:12,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:54:12,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:12,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:54:12,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:54:12,815 INFO L87 Difference]: Start difference. First operand 593 states and 852 transitions. Second operand has 6 states, 5 states have (on average 19.8) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 22:54:13,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:13,072 INFO L93 Difference]: Finished difference Result 1130 states and 1638 transitions. [2021-11-12 22:54:13,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:54:13,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.8) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 169 [2021-11-12 22:54:13,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:13,079 INFO L225 Difference]: With dead ends: 1130 [2021-11-12 22:54:13,079 INFO L226 Difference]: Without dead ends: 595 [2021-11-12 22:54:13,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:54:13,082 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 361 mSDsluCounter, 2936 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 131.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 3771 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.10ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 155.70ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:13,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 3771 Invalid, 103 Unknown, 0 Unchecked, 11.10ms Time], IncrementalHoareTripleChecker [47 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 155.70ms Time] [2021-11-12 22:54:13,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-12 22:54:13,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2021-11-12 22:54:13,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 445 states have (on average 1.451685393258427) internal successors, (646), 458 states have internal predecessors, (646), 103 states have call successors, (103), 44 states have call predecessors, (103), 46 states have return successors, (108), 101 states have call predecessors, (108), 102 states have call successors, (108) [2021-11-12 22:54:13,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 857 transitions. [2021-11-12 22:54:13,140 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 857 transitions. Word has length 169 [2021-11-12 22:54:13,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:13,142 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 857 transitions. [2021-11-12 22:54:13,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.8) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 22:54:13,142 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 857 transitions. [2021-11-12 22:54:13,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-12 22:54:13,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:13,146 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:13,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:13,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:13,363 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:13,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:13,364 INFO L85 PathProgramCache]: Analyzing trace with hash 749611397, now seen corresponding path program 1 times [2021-11-12 22:54:13,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:13,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551570801] [2021-11-12 22:54:13,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:13,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:13,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:13,366 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:13,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:54:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:13,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:54:13,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 22:54:14,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-12 22:54:14,815 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:14,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551570801] [2021-11-12 22:54:14,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551570801] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:14,815 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:14,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 22:54:14,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7169820] [2021-11-12 22:54:14,816 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:14,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:54:14,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:14,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:54:14,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:54:14,817 INFO L87 Difference]: Start difference. First operand 595 states and 857 transitions. Second operand has 12 states, 8 states have (on average 15.875) internal successors, (127), 12 states have internal predecessors, (127), 6 states have call successors, (39), 2 states have call predecessors, (39), 4 states have return successors, (34), 3 states have call predecessors, (34), 6 states have call successors, (34) [2021-11-12 22:54:15,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:15,144 INFO L93 Difference]: Finished difference Result 1118 states and 1624 transitions. [2021-11-12 22:54:15,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:54:15,145 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 15.875) internal successors, (127), 12 states have internal predecessors, (127), 6 states have call successors, (39), 2 states have call predecessors, (39), 4 states have return successors, (34), 3 states have call predecessors, (34), 6 states have call successors, (34) Word has length 177 [2021-11-12 22:54:15,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:15,150 INFO L225 Difference]: With dead ends: 1118 [2021-11-12 22:54:15,151 INFO L226 Difference]: Without dead ends: 595 [2021-11-12 22:54:15,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:54:15,154 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 706 mSDsluCounter, 5448 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 150.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 6284 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.00ms SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 181.02ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:15,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 6284 Invalid, 165 Unknown, 0 Unchecked, 29.00ms Time], IncrementalHoareTripleChecker [82 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 181.02ms Time] [2021-11-12 22:54:15,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-12 22:54:15,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2021-11-12 22:54:15,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 445 states have (on average 1.451685393258427) internal successors, (646), 458 states have internal predecessors, (646), 103 states have call successors, (103), 44 states have call predecessors, (103), 46 states have return successors, (107), 101 states have call predecessors, (107), 102 states have call successors, (107) [2021-11-12 22:54:15,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 856 transitions. [2021-11-12 22:54:15,202 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 856 transitions. Word has length 177 [2021-11-12 22:54:15,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:15,203 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 856 transitions. [2021-11-12 22:54:15,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 15.875) internal successors, (127), 12 states have internal predecessors, (127), 6 states have call successors, (39), 2 states have call predecessors, (39), 4 states have return successors, (34), 3 states have call predecessors, (34), 6 states have call successors, (34) [2021-11-12 22:54:15,204 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 856 transitions. [2021-11-12 22:54:15,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-12 22:54:15,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:15,208 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:15,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:15,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:15,428 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:15,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:15,429 INFO L85 PathProgramCache]: Analyzing trace with hash 2142565292, now seen corresponding path program 2 times [2021-11-12 22:54:15,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:15,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031280643] [2021-11-12 22:54:15,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:54:15,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:15,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:15,430 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:15,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:54:15,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-12 22:54:15,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:54:15,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:15,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-12 22:54:16,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-12 22:54:16,478 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:16,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031280643] [2021-11-12 22:54:16,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031280643] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:16,479 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:16,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:54:16,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981697438] [2021-11-12 22:54:16,479 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:16,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:54:16,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:16,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:54:16,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:54:16,481 INFO L87 Difference]: Start difference. First operand 595 states and 856 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-12 22:54:16,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:16,642 INFO L93 Difference]: Finished difference Result 1047 states and 1513 transitions. [2021-11-12 22:54:16,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:54:16,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 178 [2021-11-12 22:54:16,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:16,649 INFO L225 Difference]: With dead ends: 1047 [2021-11-12 22:54:16,649 INFO L226 Difference]: Without dead ends: 724 [2021-11-12 22:54:16,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:54:16,653 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 168 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 2561 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.69ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.57ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:16,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 2561 Invalid, 27 Unknown, 0 Unchecked, 5.69ms Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 87.57ms Time] [2021-11-12 22:54:16,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-11-12 22:54:16,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 716. [2021-11-12 22:54:16,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 549 states have (on average 1.477231329690346) internal successors, (811), 562 states have internal predecessors, (811), 120 states have call successors, (120), 44 states have call predecessors, (120), 46 states have return successors, (125), 118 states have call predecessors, (125), 119 states have call successors, (125) [2021-11-12 22:54:16,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1056 transitions. [2021-11-12 22:54:16,708 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1056 transitions. Word has length 178 [2021-11-12 22:54:16,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:16,708 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 1056 transitions. [2021-11-12 22:54:16,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-12 22:54:16,709 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1056 transitions. [2021-11-12 22:54:16,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-12 22:54:16,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:16,714 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:16,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:16,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:16,928 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:16,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:16,929 INFO L85 PathProgramCache]: Analyzing trace with hash 71969514, now seen corresponding path program 1 times [2021-11-12 22:54:16,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:16,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948281174] [2021-11-12 22:54:16,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:16,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:16,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:16,931 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:16,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:54:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:17,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:54:17,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 22:54:17,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-12 22:54:18,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:18,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948281174] [2021-11-12 22:54:18,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1948281174] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:18,310 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:18,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 22:54:18,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996975671] [2021-11-12 22:54:18,310 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:18,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:54:18,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:18,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:54:18,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:54:18,313 INFO L87 Difference]: Start difference. First operand 716 states and 1056 transitions. Second operand has 12 states, 8 states have (on average 16.625) internal successors, (133), 12 states have internal predecessors, (133), 6 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (32), 3 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-12 22:54:18,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:18,691 INFO L93 Difference]: Finished difference Result 1362 states and 2027 transitions. [2021-11-12 22:54:18,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:54:18,692 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 16.625) internal successors, (133), 12 states have internal predecessors, (133), 6 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (32), 3 states have call predecessors, (32), 6 states have call successors, (32) Word has length 183 [2021-11-12 22:54:18,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:18,698 INFO L225 Difference]: With dead ends: 1362 [2021-11-12 22:54:18,699 INFO L226 Difference]: Without dead ends: 718 [2021-11-12 22:54:18,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:54:18,702 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 528 mSDsluCounter, 6930 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 196.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 7767 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.19ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 228.96ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:18,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 7767 Invalid, 173 Unknown, 0 Unchecked, 19.19ms Time], IncrementalHoareTripleChecker [60 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 228.96ms Time] [2021-11-12 22:54:18,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-11-12 22:54:18,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 718. [2021-11-12 22:54:18,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 550 states have (on average 1.4763636363636363) internal successors, (812), 564 states have internal predecessors, (812), 120 states have call successors, (120), 44 states have call predecessors, (120), 47 states have return successors, (127), 118 states have call predecessors, (127), 119 states have call successors, (127) [2021-11-12 22:54:18,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1059 transitions. [2021-11-12 22:54:18,768 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1059 transitions. Word has length 183 [2021-11-12 22:54:18,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:18,768 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 1059 transitions. [2021-11-12 22:54:18,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 16.625) internal successors, (133), 12 states have internal predecessors, (133), 6 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (32), 3 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-12 22:54:18,769 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1059 transitions. [2021-11-12 22:54:18,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-12 22:54:18,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:18,773 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:18,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:18,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:18,989 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:18,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:18,990 INFO L85 PathProgramCache]: Analyzing trace with hash 748687466, now seen corresponding path program 1 times [2021-11-12 22:54:18,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:18,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520088219] [2021-11-12 22:54:18,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:18,991 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:18,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:18,992 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:19,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:54:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:19,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:54:19,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:19,844 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 22:54:19,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:20,399 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-12 22:54:20,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:20,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520088219] [2021-11-12 22:54:20,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520088219] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:20,399 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:20,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-12 22:54:20,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505719851] [2021-11-12 22:54:20,400 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:20,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:54:20,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:20,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:54:20,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:54:20,401 INFO L87 Difference]: Start difference. First operand 718 states and 1059 transitions. Second operand has 10 states, 7 states have (on average 19.0) internal successors, (133), 10 states have internal predecessors, (133), 5 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (31), 3 states have call predecessors, (31), 5 states have call successors, (31) [2021-11-12 22:54:20,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:20,696 INFO L93 Difference]: Finished difference Result 1364 states and 2030 transitions. [2021-11-12 22:54:20,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:54:20,697 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 19.0) internal successors, (133), 10 states have internal predecessors, (133), 5 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (31), 3 states have call predecessors, (31), 5 states have call successors, (31) Word has length 184 [2021-11-12 22:54:20,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:20,703 INFO L225 Difference]: With dead ends: 1364 [2021-11-12 22:54:20,703 INFO L226 Difference]: Without dead ends: 720 [2021-11-12 22:54:20,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:54:20,707 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 361 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 163.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 5453 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.19ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 187.31ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:20,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 5453 Invalid, 117 Unknown, 0 Unchecked, 10.19ms Time], IncrementalHoareTripleChecker [44 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 187.31ms Time] [2021-11-12 22:54:20,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-11-12 22:54:20,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 718. [2021-11-12 22:54:20,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 550 states have (on average 1.4763636363636363) internal successors, (812), 564 states have internal predecessors, (812), 120 states have call successors, (120), 44 states have call predecessors, (120), 47 states have return successors, (127), 118 states have call predecessors, (127), 119 states have call successors, (127) [2021-11-12 22:54:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1059 transitions. [2021-11-12 22:54:20,769 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1059 transitions. Word has length 184 [2021-11-12 22:54:20,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:20,770 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 1059 transitions. [2021-11-12 22:54:20,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 19.0) internal successors, (133), 10 states have internal predecessors, (133), 5 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (31), 3 states have call predecessors, (31), 5 states have call successors, (31) [2021-11-12 22:54:20,770 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1059 transitions. [2021-11-12 22:54:20,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-12 22:54:20,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:20,776 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:20,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:20,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:20,994 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:20,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:20,994 INFO L85 PathProgramCache]: Analyzing trace with hash 97726220, now seen corresponding path program 1 times [2021-11-12 22:54:20,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:20,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101801530] [2021-11-12 22:54:20,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:20,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:20,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:20,996 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:20,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:54:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:21,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:54:21,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-12 22:54:21,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-12 22:54:22,203 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:22,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101801530] [2021-11-12 22:54:22,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101801530] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:22,203 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:22,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-12 22:54:22,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467478973] [2021-11-12 22:54:22,204 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:22,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:54:22,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:22,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:54:22,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:54:22,206 INFO L87 Difference]: Start difference. First operand 718 states and 1059 transitions. Second operand has 9 states, 7 states have (on average 19.571428571428573) internal successors, (137), 9 states have internal predecessors, (137), 4 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33) [2021-11-12 22:54:22,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:22,512 INFO L93 Difference]: Finished difference Result 1359 states and 2021 transitions. [2021-11-12 22:54:22,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:54:22,513 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 19.571428571428573) internal successors, (137), 9 states have internal predecessors, (137), 4 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33) Word has length 191 [2021-11-12 22:54:22,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:22,521 INFO L225 Difference]: With dead ends: 1359 [2021-11-12 22:54:22,522 INFO L226 Difference]: Without dead ends: 718 [2021-11-12 22:54:22,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:54:22,526 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 355 mSDsluCounter, 5059 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 172.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 5894 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.68ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 195.85ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:22,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 5894 Invalid, 128 Unknown, 0 Unchecked, 10.68ms Time], IncrementalHoareTripleChecker [41 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 195.85ms Time] [2021-11-12 22:54:22,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-11-12 22:54:22,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 718. [2021-11-12 22:54:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 550 states have (on average 1.4763636363636363) internal successors, (812), 564 states have internal predecessors, (812), 120 states have call successors, (120), 44 states have call predecessors, (120), 47 states have return successors, (126), 118 states have call predecessors, (126), 119 states have call successors, (126) [2021-11-12 22:54:22,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1058 transitions. [2021-11-12 22:54:22,595 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1058 transitions. Word has length 191 [2021-11-12 22:54:22,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:22,600 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 1058 transitions. [2021-11-12 22:54:22,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 19.571428571428573) internal successors, (137), 9 states have internal predecessors, (137), 4 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33) [2021-11-12 22:54:22,601 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1058 transitions. [2021-11-12 22:54:22,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-12 22:54:22,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:22,606 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:22,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:22,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:22,827 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:22,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:22,827 INFO L85 PathProgramCache]: Analyzing trace with hash -244356176, now seen corresponding path program 1 times [2021-11-12 22:54:22,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:22,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563676842] [2021-11-12 22:54:22,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:22,828 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:22,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:22,829 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:22,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:54:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:23,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:54:23,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:23,625 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-12 22:54:23,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-12 22:54:24,057 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:24,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563676842] [2021-11-12 22:54:24,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563676842] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:24,057 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:24,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-12 22:54:24,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080793581] [2021-11-12 22:54:24,058 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:24,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:54:24,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:24,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:54:24,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:54:24,060 INFO L87 Difference]: Start difference. First operand 718 states and 1058 transitions. Second operand has 9 states, 7 states have (on average 18.714285714285715) internal successors, (131), 9 states have internal predecessors, (131), 4 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-12 22:54:24,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:24,276 INFO L93 Difference]: Finished difference Result 1361 states and 2027 transitions. [2021-11-12 22:54:24,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:54:24,277 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 18.714285714285715) internal successors, (131), 9 states have internal predecessors, (131), 4 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) Word has length 185 [2021-11-12 22:54:24,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:24,283 INFO L225 Difference]: With dead ends: 1361 [2021-11-12 22:54:24,283 INFO L226 Difference]: Without dead ends: 720 [2021-11-12 22:54:24,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:54:24,287 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 706 mSDsluCounter, 2118 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 120.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 2954 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.91ms SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 138.78ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:24,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 2954 Invalid, 135 Unknown, 0 Unchecked, 5.91ms Time], IncrementalHoareTripleChecker [78 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 138.78ms Time] [2021-11-12 22:54:24,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-11-12 22:54:24,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 720. [2021-11-12 22:54:24,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 551 states have (on average 1.4754990925589837) internal successors, (813), 566 states have internal predecessors, (813), 120 states have call successors, (120), 44 states have call predecessors, (120), 48 states have return successors, (131), 118 states have call predecessors, (131), 119 states have call successors, (131) [2021-11-12 22:54:24,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1064 transitions. [2021-11-12 22:54:24,337 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1064 transitions. Word has length 185 [2021-11-12 22:54:24,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:24,338 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 1064 transitions. [2021-11-12 22:54:24,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 18.714285714285715) internal successors, (131), 9 states have internal predecessors, (131), 4 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-12 22:54:24,338 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1064 transitions. [2021-11-12 22:54:24,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-12 22:54:24,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:24,360 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:24,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:24,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:24,575 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:24,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:24,576 INFO L85 PathProgramCache]: Analyzing trace with hash 980208817, now seen corresponding path program 1 times [2021-11-12 22:54:24,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:24,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961512288] [2021-11-12 22:54:24,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:24,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:24,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:24,578 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:24,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:54:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:25,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:25,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:25,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:25,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:25,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961512288] [2021-11-12 22:54:25,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961512288] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:25,596 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:25,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:25,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175641811] [2021-11-12 22:54:25,596 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:25,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:25,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:25,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:25,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:25,598 INFO L87 Difference]: Start difference. First operand 720 states and 1064 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 22:54:25,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:25,683 INFO L93 Difference]: Finished difference Result 1427 states and 2131 transitions. [2021-11-12 22:54:25,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:25,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 186 [2021-11-12 22:54:25,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:25,692 INFO L225 Difference]: With dead ends: 1427 [2021-11-12 22:54:25,692 INFO L226 Difference]: Without dead ends: 820 [2021-11-12 22:54:25,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:25,696 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 165 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.58ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.21ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:25,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 1667 Invalid, 4 Unknown, 0 Unchecked, 4.58ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 25.21ms Time] [2021-11-12 22:54:25,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-11-12 22:54:25,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 812. [2021-11-12 22:54:25,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 629 states have (on average 1.4817170111287759) internal successors, (932), 644 states have internal predecessors, (932), 134 states have call successors, (134), 44 states have call predecessors, (134), 48 states have return successors, (147), 132 states have call predecessors, (147), 133 states have call successors, (147) [2021-11-12 22:54:25,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1213 transitions. [2021-11-12 22:54:25,775 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1213 transitions. Word has length 186 [2021-11-12 22:54:25,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:25,776 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1213 transitions. [2021-11-12 22:54:25,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 22:54:25,776 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1213 transitions. [2021-11-12 22:54:25,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-12 22:54:25,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:25,781 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:25,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-12 22:54:26,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:26,003 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:26,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:26,003 INFO L85 PathProgramCache]: Analyzing trace with hash -767210018, now seen corresponding path program 1 times [2021-11-12 22:54:26,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:26,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152115595] [2021-11-12 22:54:26,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:26,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:26,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:26,006 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:26,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:54:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:26,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:26,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:26,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:27,327 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:27,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152115595] [2021-11-12 22:54:27,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152115595] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:27,328 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:27,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:27,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308979858] [2021-11-12 22:54:27,329 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:27,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:27,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:27,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:27,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:27,333 INFO L87 Difference]: Start difference. First operand 812 states and 1213 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-12 22:54:27,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:27,414 INFO L93 Difference]: Finished difference Result 1703 states and 2586 transitions. [2021-11-12 22:54:27,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:27,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 194 [2021-11-12 22:54:27,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:27,427 INFO L225 Difference]: With dead ends: 1703 [2021-11-12 22:54:27,427 INFO L226 Difference]: Without dead ends: 1015 [2021-11-12 22:54:27,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:27,433 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 163 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1710 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.35ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.61ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:27,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1710 Invalid, 4 Unknown, 0 Unchecked, 3.35ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 4.61ms Time] [2021-11-12 22:54:27,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2021-11-12 22:54:27,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 1007. [2021-11-12 22:54:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 793 states have (on average 1.4968474148802018) internal successors, (1187), 808 states have internal predecessors, (1187), 165 states have call successors, (165), 44 states have call predecessors, (165), 48 states have return successors, (182), 163 states have call predecessors, (182), 164 states have call successors, (182) [2021-11-12 22:54:27,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1534 transitions. [2021-11-12 22:54:27,501 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1534 transitions. Word has length 194 [2021-11-12 22:54:27,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:27,502 INFO L470 AbstractCegarLoop]: Abstraction has 1007 states and 1534 transitions. [2021-11-12 22:54:27,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-12 22:54:27,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1534 transitions. [2021-11-12 22:54:27,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-12 22:54:27,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:27,509 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:27,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:27,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:27,729 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:27,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:27,729 INFO L85 PathProgramCache]: Analyzing trace with hash 2115064731, now seen corresponding path program 1 times [2021-11-12 22:54:27,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:27,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759029356] [2021-11-12 22:54:27,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:27,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:27,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:27,731 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:27,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:54:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:28,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:28,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:28,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:28,820 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:28,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759029356] [2021-11-12 22:54:28,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759029356] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:28,822 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:28,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:28,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844032977] [2021-11-12 22:54:28,823 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:28,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:28,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:28,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:28,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:28,825 INFO L87 Difference]: Start difference. First operand 1007 states and 1534 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 22:54:28,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:28,915 INFO L93 Difference]: Finished difference Result 2274 states and 3526 transitions. [2021-11-12 22:54:28,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:28,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 188 [2021-11-12 22:54:28,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:28,929 INFO L225 Difference]: With dead ends: 2274 [2021-11-12 22:54:28,929 INFO L226 Difference]: Without dead ends: 1399 [2021-11-12 22:54:28,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:28,934 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 161 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.62ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.75ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:28,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 1701 Invalid, 4 Unknown, 0 Unchecked, 3.62ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 4.75ms Time] [2021-11-12 22:54:28,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2021-11-12 22:54:29,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1391. [2021-11-12 22:54:29,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1119 states have (on average 1.519213583556747) internal successors, (1700), 1134 states have internal predecessors, (1700), 223 states have call successors, (223), 44 states have call predecessors, (223), 48 states have return successors, (240), 221 states have call predecessors, (240), 222 states have call successors, (240) [2021-11-12 22:54:29,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 2163 transitions. [2021-11-12 22:54:29,064 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 2163 transitions. Word has length 188 [2021-11-12 22:54:29,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:29,065 INFO L470 AbstractCegarLoop]: Abstraction has 1391 states and 2163 transitions. [2021-11-12 22:54:29,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 22:54:29,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 2163 transitions. [2021-11-12 22:54:29,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-12 22:54:29,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:29,072 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:29,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:29,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:29,291 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:29,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:29,291 INFO L85 PathProgramCache]: Analyzing trace with hash -662144991, now seen corresponding path program 1 times [2021-11-12 22:54:29,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:29,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359552676] [2021-11-12 22:54:29,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:29,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:29,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:29,293 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:29,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:54:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:29,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:29,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:30,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:30,367 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:30,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359552676] [2021-11-12 22:54:30,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359552676] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:30,368 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:30,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:30,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070686029] [2021-11-12 22:54:30,368 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:30,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:30,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:30,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:30,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:30,371 INFO L87 Difference]: Start difference. First operand 1391 states and 2163 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 22:54:30,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:30,506 INFO L93 Difference]: Finished difference Result 3369 states and 5337 transitions. [2021-11-12 22:54:30,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:30,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 189 [2021-11-12 22:54:30,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:30,523 INFO L225 Difference]: With dead ends: 3369 [2021-11-12 22:54:30,523 INFO L226 Difference]: Without dead ends: 2121 [2021-11-12 22:54:30,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:30,532 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 159 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1696 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.33ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.21ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:30,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 1696 Invalid, 4 Unknown, 0 Unchecked, 3.33ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 4.21ms Time] [2021-11-12 22:54:30,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2021-11-12 22:54:30,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 2113. [2021-11-12 22:54:30,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 1745 states have (on average 1.5432664756446992) internal successors, (2693), 1760 states have internal predecessors, (2693), 319 states have call successors, (319), 44 states have call predecessors, (319), 48 states have return successors, (344), 317 states have call predecessors, (344), 318 states have call successors, (344) [2021-11-12 22:54:30,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 3356 transitions. [2021-11-12 22:54:30,720 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 3356 transitions. Word has length 189 [2021-11-12 22:54:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:30,721 INFO L470 AbstractCegarLoop]: Abstraction has 2113 states and 3356 transitions. [2021-11-12 22:54:30,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 22:54:30,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 3356 transitions. [2021-11-12 22:54:30,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-12 22:54:30,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:30,729 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:30,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:30,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:30,947 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:30,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:30,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1050601667, now seen corresponding path program 1 times [2021-11-12 22:54:30,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:30,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257554731] [2021-11-12 22:54:30,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:30,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:30,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:30,950 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:30,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:54:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:31,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:31,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:31,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:32,005 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:32,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257554731] [2021-11-12 22:54:32,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257554731] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:32,005 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:32,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:32,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49023642] [2021-11-12 22:54:32,006 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:32,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:32,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:32,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:32,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:32,007 INFO L87 Difference]: Start difference. First operand 2113 states and 3356 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 22:54:32,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:32,237 INFO L93 Difference]: Finished difference Result 5458 states and 8804 transitions. [2021-11-12 22:54:32,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:32,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 190 [2021-11-12 22:54:32,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:32,262 INFO L225 Difference]: With dead ends: 5458 [2021-11-12 22:54:32,262 INFO L226 Difference]: Without dead ends: 3499 [2021-11-12 22:54:32,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:32,271 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 157 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1696 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.81ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.86ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:32,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 1696 Invalid, 4 Unknown, 0 Unchecked, 3.81ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 4.86ms Time] [2021-11-12 22:54:32,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3499 states. [2021-11-12 22:54:32,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3499 to 3491. [2021-11-12 22:54:32,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3491 states, 2955 states have (on average 1.5641285956006767) internal successors, (4622), 2970 states have internal predecessors, (4622), 487 states have call successors, (487), 44 states have call predecessors, (487), 48 states have return successors, (528), 485 states have call predecessors, (528), 486 states have call successors, (528) [2021-11-12 22:54:32,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3491 states to 3491 states and 5637 transitions. [2021-11-12 22:54:32,561 INFO L78 Accepts]: Start accepts. Automaton has 3491 states and 5637 transitions. Word has length 190 [2021-11-12 22:54:32,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:32,561 INFO L470 AbstractCegarLoop]: Abstraction has 3491 states and 5637 transitions. [2021-11-12 22:54:32,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 22:54:32,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3491 states and 5637 transitions. [2021-11-12 22:54:32,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-12 22:54:32,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:32,572 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:32,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:32,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:32,787 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:32,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:32,788 INFO L85 PathProgramCache]: Analyzing trace with hash -268075998, now seen corresponding path program 1 times [2021-11-12 22:54:32,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:32,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132355365] [2021-11-12 22:54:32,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:32,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:32,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:32,789 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:32,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:54:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:33,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:33,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:33,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:33,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:33,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132355365] [2021-11-12 22:54:33,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132355365] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:33,844 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:33,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:33,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808681229] [2021-11-12 22:54:33,844 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:33,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:33,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:33,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:33,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:33,846 INFO L87 Difference]: Start difference. First operand 3491 states and 5637 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-12 22:54:34,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:34,262 INFO L93 Difference]: Finished difference Result 9451 states and 15406 transitions. [2021-11-12 22:54:34,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:34,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 198 [2021-11-12 22:54:34,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:34,310 INFO L225 Difference]: With dead ends: 9451 [2021-11-12 22:54:34,310 INFO L226 Difference]: Without dead ends: 6125 [2021-11-12 22:54:34,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:34,323 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 155 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1714 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.76ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.93ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:34,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 1714 Invalid, 4 Unknown, 0 Unchecked, 3.76ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 20.93ms Time] [2021-11-12 22:54:34,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6125 states. [2021-11-12 22:54:34,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6125 to 6117. [2021-11-12 22:54:34,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6117 states, 5197 states have (on average 1.5668654993265345) internal successors, (8143), 5212 states have internal predecessors, (8143), 871 states have call successors, (871), 44 states have call predecessors, (871), 48 states have return successors, (944), 869 states have call predecessors, (944), 870 states have call successors, (944) [2021-11-12 22:54:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6117 states to 6117 states and 9958 transitions. [2021-11-12 22:54:34,818 INFO L78 Accepts]: Start accepts. Automaton has 6117 states and 9958 transitions. Word has length 198 [2021-11-12 22:54:34,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:34,818 INFO L470 AbstractCegarLoop]: Abstraction has 6117 states and 9958 transitions. [2021-11-12 22:54:34,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-12 22:54:34,820 INFO L276 IsEmpty]: Start isEmpty. Operand 6117 states and 9958 transitions. [2021-11-12 22:54:34,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-12 22:54:34,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:34,833 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:34,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:35,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:35,053 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:35,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:35,053 INFO L85 PathProgramCache]: Analyzing trace with hash -694309517, now seen corresponding path program 1 times [2021-11-12 22:54:35,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:35,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894424285] [2021-11-12 22:54:35,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:35,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:35,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:35,056 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:35,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:54:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:35,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:35,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:35,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:36,253 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:36,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894424285] [2021-11-12 22:54:36,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894424285] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:36,254 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:36,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:54:36,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545281671] [2021-11-12 22:54:36,255 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:36,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:54:36,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:36,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:54:36,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:54:36,257 INFO L87 Difference]: Start difference. First operand 6117 states and 9958 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 22:54:36,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:36,775 INFO L93 Difference]: Finished difference Result 12029 states and 19617 transitions. [2021-11-12 22:54:36,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:36,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 192 [2021-11-12 22:54:36,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:36,836 INFO L225 Difference]: With dead ends: 12029 [2021-11-12 22:54:36,836 INFO L226 Difference]: Without dead ends: 6125 [2021-11-12 22:54:36,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:54:36,862 INFO L933 BasicCegarLoop]: 1029 mSDtfsCounter, 302 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 1890 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.75ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.34ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:36,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 1890 Invalid, 21 Unknown, 0 Unchecked, 4.75ms Time], IncrementalHoareTripleChecker [18 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 55.34ms Time] [2021-11-12 22:54:36,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6125 states. [2021-11-12 22:54:37,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6125 to 6117. [2021-11-12 22:54:37,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6117 states, 5197 states have (on average 1.5607081008274004) internal successors, (8111), 5212 states have internal predecessors, (8111), 871 states have call successors, (871), 44 states have call predecessors, (871), 48 states have return successors, (944), 869 states have call predecessors, (944), 870 states have call successors, (944) [2021-11-12 22:54:37,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6117 states to 6117 states and 9926 transitions. [2021-11-12 22:54:37,582 INFO L78 Accepts]: Start accepts. Automaton has 6117 states and 9926 transitions. Word has length 192 [2021-11-12 22:54:37,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:37,583 INFO L470 AbstractCegarLoop]: Abstraction has 6117 states and 9926 transitions. [2021-11-12 22:54:37,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 22:54:37,583 INFO L276 IsEmpty]: Start isEmpty. Operand 6117 states and 9926 transitions. [2021-11-12 22:54:37,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-12 22:54:37,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:37,599 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:37,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:37,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:37,822 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:37,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:37,822 INFO L85 PathProgramCache]: Analyzing trace with hash 808296846, now seen corresponding path program 1 times [2021-11-12 22:54:37,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:37,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490967066] [2021-11-12 22:54:37,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:37,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:37,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:37,824 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:37,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:54:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:38,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:38,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:38,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:38,973 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:38,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490967066] [2021-11-12 22:54:38,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490967066] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:38,973 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:38,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:38,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236790835] [2021-11-12 22:54:38,974 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:38,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:38,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:38,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:38,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:38,976 INFO L87 Difference]: Start difference. First operand 6117 states and 9926 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 22:54:39,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:39,560 INFO L93 Difference]: Finished difference Result 17255 states and 28230 transitions. [2021-11-12 22:54:39,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:39,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 192 [2021-11-12 22:54:39,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:39,604 INFO L225 Difference]: With dead ends: 17255 [2021-11-12 22:54:39,604 INFO L226 Difference]: Without dead ends: 11311 [2021-11-12 22:54:39,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:39,626 INFO L933 BasicCegarLoop]: 864 mSDtfsCounter, 153 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.20ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.36ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:39,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 1702 Invalid, 4 Unknown, 0 Unchecked, 3.20ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 6.36ms Time] [2021-11-12 22:54:39,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11311 states. [2021-11-12 22:54:40,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11311 to 11303. [2021-11-12 22:54:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11303 states, 9679 states have (on average 1.5687571030065088) internal successors, (15184), 9694 states have internal predecessors, (15184), 1575 states have call successors, (1575), 44 states have call predecessors, (1575), 48 states have return successors, (1712), 1573 states have call predecessors, (1712), 1574 states have call successors, (1712) [2021-11-12 22:54:40,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11303 states to 11303 states and 18471 transitions. [2021-11-12 22:54:40,574 INFO L78 Accepts]: Start accepts. Automaton has 11303 states and 18471 transitions. Word has length 192 [2021-11-12 22:54:40,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:40,575 INFO L470 AbstractCegarLoop]: Abstraction has 11303 states and 18471 transitions. [2021-11-12 22:54:40,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 22:54:40,576 INFO L276 IsEmpty]: Start isEmpty. Operand 11303 states and 18471 transitions. [2021-11-12 22:54:40,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-12 22:54:40,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:40,595 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:40,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:40,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:40,815 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:40,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:40,815 INFO L85 PathProgramCache]: Analyzing trace with hash 981028059, now seen corresponding path program 1 times [2021-11-12 22:54:40,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:40,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054271373] [2021-11-12 22:54:40,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:40,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:40,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:40,818 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:40,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:54:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:41,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:41,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:41,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:42,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:42,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054271373] [2021-11-12 22:54:42,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054271373] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:42,083 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:42,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:42,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085459832] [2021-11-12 22:54:42,084 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:42,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:42,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:42,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:42,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:42,085 INFO L87 Difference]: Start difference. First operand 11303 states and 18471 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-12 22:54:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:42,969 INFO L93 Difference]: Finished difference Result 30419 states and 49407 transitions. [2021-11-12 22:54:42,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:42,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 200 [2021-11-12 22:54:42,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:43,139 INFO L225 Difference]: With dead ends: 30419 [2021-11-12 22:54:43,139 INFO L226 Difference]: Without dead ends: 19313 [2021-11-12 22:54:43,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:43,166 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 151 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.11ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.55ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:43,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 1686 Invalid, 4 Unknown, 0 Unchecked, 3.11ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 5.55ms Time] [2021-11-12 22:54:43,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19313 states. [2021-11-12 22:54:44,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19313 to 19305. [2021-11-12 22:54:44,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19305 states, 16593 states have (on average 1.536129693244139) internal successors, (25489), 16608 states have internal predecessors, (25489), 2663 states have call successors, (2663), 44 states have call predecessors, (2663), 48 states have return successors, (2928), 2661 states have call predecessors, (2928), 2662 states have call successors, (2928) [2021-11-12 22:54:44,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19305 states to 19305 states and 31080 transitions. [2021-11-12 22:54:44,766 INFO L78 Accepts]: Start accepts. Automaton has 19305 states and 31080 transitions. Word has length 200 [2021-11-12 22:54:44,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:44,767 INFO L470 AbstractCegarLoop]: Abstraction has 19305 states and 31080 transitions. [2021-11-12 22:54:44,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-12 22:54:44,768 INFO L276 IsEmpty]: Start isEmpty. Operand 19305 states and 31080 transitions. [2021-11-12 22:54:44,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-12 22:54:44,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:44,798 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:44,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:45,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:45,020 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:45,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:45,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1057554474, now seen corresponding path program 1 times [2021-11-12 22:54:45,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:45,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646584065] [2021-11-12 22:54:45,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:45,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:45,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:45,026 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:45,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:54:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:45,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:45,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:45,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:46,351 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:46,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646584065] [2021-11-12 22:54:46,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646584065] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:46,351 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:46,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:46,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371001555] [2021-11-12 22:54:46,352 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:46,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:46,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:46,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:46,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:46,353 INFO L87 Difference]: Start difference. First operand 19305 states and 31080 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 22:54:48,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:48,292 INFO L93 Difference]: Finished difference Result 56080 states and 90552 transitions. [2021-11-12 22:54:48,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:48,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 194 [2021-11-12 22:54:48,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:48,462 INFO L225 Difference]: With dead ends: 56080 [2021-11-12 22:54:48,463 INFO L226 Difference]: Without dead ends: 36979 [2021-11-12 22:54:48,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:48,509 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 149 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.51ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.24ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:48,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 1702 Invalid, 4 Unknown, 0 Unchecked, 3.51ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 20.24ms Time] [2021-11-12 22:54:48,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36979 states. [2021-11-12 22:54:51,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36979 to 36971. [2021-11-12 22:54:51,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36971 states, 31955 states have (on average 1.5347207009857613) internal successors, (49042), 31970 states have internal predecessors, (49042), 4967 states have call successors, (4967), 44 states have call predecessors, (4967), 48 states have return successors, (5488), 4965 states have call predecessors, (5488), 4966 states have call successors, (5488) [2021-11-12 22:54:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36971 states to 36971 states and 59497 transitions. [2021-11-12 22:54:51,507 INFO L78 Accepts]: Start accepts. Automaton has 36971 states and 59497 transitions. Word has length 194 [2021-11-12 22:54:51,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:51,507 INFO L470 AbstractCegarLoop]: Abstraction has 36971 states and 59497 transitions. [2021-11-12 22:54:51,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 22:54:51,508 INFO L276 IsEmpty]: Start isEmpty. Operand 36971 states and 59497 transitions. [2021-11-12 22:54:51,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-12 22:54:51,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:51,536 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:51,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-12 22:54:51,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:51,751 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:51,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:51,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1408394320, now seen corresponding path program 1 times [2021-11-12 22:54:51,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:51,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914890445] [2021-11-12 22:54:51,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:51,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:51,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:51,753 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:51,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:54:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:52,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:52,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:52,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:52,891 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:52,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914890445] [2021-11-12 22:54:52,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914890445] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:52,892 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:52,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:52,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447321721] [2021-11-12 22:54:52,892 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:52,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:52,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:52,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:52,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:52,894 INFO L87 Difference]: Start difference. First operand 36971 states and 59497 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 22:54:57,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:57,165 INFO L93 Difference]: Finished difference Result 107532 states and 173744 transitions. [2021-11-12 22:54:57,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:57,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 195 [2021-11-12 22:54:57,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:57,523 INFO L225 Difference]: With dead ends: 107532 [2021-11-12 22:54:57,524 INFO L226 Difference]: Without dead ends: 70773 [2021-11-12 22:54:57,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:57,609 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 147 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1708 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.11ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.26ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:57,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 1708 Invalid, 4 Unknown, 0 Unchecked, 3.11ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 4.26ms Time] [2021-11-12 22:54:57,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70773 states. [2021-11-12 22:55:03,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70773 to 70765. [2021-11-12 22:55:03,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70765 states, 61397 states have (on average 1.5368014723846442) internal successors, (94355), 61412 states have internal predecessors, (94355), 9319 states have call successors, (9319), 44 states have call predecessors, (9319), 48 states have return successors, (10352), 9317 states have call predecessors, (10352), 9318 states have call successors, (10352) [2021-11-12 22:55:03,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70765 states to 70765 states and 114026 transitions. [2021-11-12 22:55:03,916 INFO L78 Accepts]: Start accepts. Automaton has 70765 states and 114026 transitions. Word has length 195 [2021-11-12 22:55:03,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:03,917 INFO L470 AbstractCegarLoop]: Abstraction has 70765 states and 114026 transitions. [2021-11-12 22:55:03,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 22:55:03,917 INFO L276 IsEmpty]: Start isEmpty. Operand 70765 states and 114026 transitions. [2021-11-12 22:55:03,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-12 22:55:03,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:03,952 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:03,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:04,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:04,167 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:04,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:04,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1761560516, now seen corresponding path program 1 times [2021-11-12 22:55:04,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:04,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681631509] [2021-11-12 22:55:04,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:04,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:04,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:04,170 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:04,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c58f632e-a00c-4624-bd4c-e341584ee6cb/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:55:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:04,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:55:04,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:55:04,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:55:05,324 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:05,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681631509] [2021-11-12 22:55:05,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681631509] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:05,325 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:05,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:55:05,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342689980] [2021-11-12 22:55:05,325 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:05,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:55:05,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:05,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:55:05,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:55:05,327 INFO L87 Difference]: Start difference. First operand 70765 states and 114026 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-12 22:55:13,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:13,441 INFO L93 Difference]: Finished difference Result 137140 states and 221484 transitions. [2021-11-12 22:55:13,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:55:13,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 203 [2021-11-12 22:55:13,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:14,007 INFO L225 Difference]: With dead ends: 137140 [2021-11-12 22:55:14,008 INFO L226 Difference]: Without dead ends: 136817 [2021-11-12 22:55:14,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:55:14,061 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 145 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.13ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.27ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:14,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 1702 Invalid, 4 Unknown, 0 Unchecked, 4.13ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 4.27ms Time] [2021-11-12 22:55:14,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136817 states.