./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec4_productSimulator.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cf397912a53dab4d44f4df9c274fc7c69b1023a0a0a29a356bc73a744537daa6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:23:02,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:23:02,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:23:02,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:23:02,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:23:02,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:23:02,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:23:02,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:23:02,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:23:02,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:23:02,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:23:02,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:23:02,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:23:02,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:23:02,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:23:02,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:23:02,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:23:02,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:23:02,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:23:02,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:23:02,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:23:02,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:23:02,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:23:02,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:23:02,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:23:02,968 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:23:02,968 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:23:02,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:23:02,972 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:23:02,974 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:23:02,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:23:02,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:23:02,979 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:23:02,981 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:23:02,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:23:02,984 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:23:02,985 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:23:02,986 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:23:02,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:23:02,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:23:02,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:23:02,991 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:23:03,046 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:23:03,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:23:03,049 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:23:03,049 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:23:03,050 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:23:03,050 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:23:03,050 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:23:03,051 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:23:03,051 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:23:03,052 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:23:03,053 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:23:03,054 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:23:03,054 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:23:03,054 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:23:03,055 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:23:03,055 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:23:03,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:23:03,057 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:23:03,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:23:03,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:23:03,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:23:03,058 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:23:03,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:23:03,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:23:03,059 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:23:03,060 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:23:03,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:23:03,060 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:23:03,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:23:03,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:23:03,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:23:03,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:23:03,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:23:03,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:23:03,063 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:23:03,064 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:23:03,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:23:03,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:23:03,065 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:23:03,065 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:23:03,066 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_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf397912a53dab4d44f4df9c274fc7c69b1023a0a0a29a356bc73a744537daa6 [2021-11-19 13:23:03,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:23:03,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:23:03,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:23:03,556 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:23:03,557 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:23:03,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/email_spec4_productSimulator.cil.c [2021-11-19 13:23:03,651 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/data/e9436ccf3/d8ea9effdc5641ff9ce867c0fa10d7c7/FLAG12d208634 [2021-11-19 13:23:04,500 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:23:04,500 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/sv-benchmarks/c/product-lines/email_spec4_productSimulator.cil.c [2021-11-19 13:23:04,530 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/data/e9436ccf3/d8ea9effdc5641ff9ce867c0fa10d7c7/FLAG12d208634 [2021-11-19 13:23:04,656 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/data/e9436ccf3/d8ea9effdc5641ff9ce867c0fa10d7c7 [2021-11-19 13:23:04,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:23:04,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:23:04,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:23:04,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:23:04,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:23:04,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:23:04" (1/1) ... [2021-11-19 13:23:04,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@685ee0bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:04, skipping insertion in model container [2021-11-19 13:23:04,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:23:04" (1/1) ... [2021-11-19 13:23:04,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:23:04,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:23:05,448 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/sv-benchmarks/c/product-lines/email_spec4_productSimulator.cil.c[18883,18896] [2021-11-19 13:23:05,718 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:23:05,749 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 13:23:05,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@60e362ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:05, skipping insertion in model container [2021-11-19 13:23:05,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:23:05,751 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:23:05,754 INFO L158 Benchmark]: Toolchain (without parser) took 1088.93ms. Allocated memory is still 107.0MB. Free memory was 62.7MB in the beginning and 65.5MB in the end (delta: -2.8MB). Peak memory consumption was 5.1MB. Max. memory is 16.1GB. [2021-11-19 13:23:05,756 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 107.0MB. Free memory is still 81.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:23:05,758 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1082.72ms. Allocated memory is still 107.0MB. Free memory was 62.5MB in the beginning and 65.5MB in the end (delta: -3.0MB). Peak memory consumption was 5.1MB. Max. memory is 16.1GB. [2021-11-19 13:23:05,761 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 107.0MB. Free memory is still 81.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1082.72ms. Allocated memory is still 107.0MB. Free memory was 62.5MB in the beginning and 65.5MB in the end (delta: -3.0MB). Peak memory consumption was 5.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3109]: 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_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cf397912a53dab4d44f4df9c274fc7c69b1023a0a0a29a356bc73a744537daa6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:23:08,533 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:23:08,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:23:08,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:23:08,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:23:08,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:23:08,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:23:08,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:23:08,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:23:08,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:23:08,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:23:08,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:23:08,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:23:08,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:23:08,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:23:08,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:23:08,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:23:08,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:23:08,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:23:08,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:23:08,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:23:08,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:23:08,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:23:08,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:23:08,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:23:08,646 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:23:08,647 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:23:08,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:23:08,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:23:08,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:23:08,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:23:08,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:23:08,664 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:23:08,665 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:23:08,667 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:23:08,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:23:08,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:23:08,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:23:08,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:23:08,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:23:08,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:23:08,675 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:23:08,713 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:23:08,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:23:08,715 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:23:08,715 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:23:08,715 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:23:08,716 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:23:08,716 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:23:08,716 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:23:08,717 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:23:08,717 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:23:08,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:23:08,718 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:23:08,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:23:08,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:23:08,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:23:08,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:23:08,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:23:08,720 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:23:08,720 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:23:08,720 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:23:08,721 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:23:08,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:23:08,721 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:23:08,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:23:08,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:23:08,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:23:08,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:23:08,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:23:08,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:23:08,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:23:08,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:23:08,724 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:23:08,724 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:23:08,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:23:08,725 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:23:08,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:23:08,725 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_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf397912a53dab4d44f4df9c274fc7c69b1023a0a0a29a356bc73a744537daa6 [2021-11-19 13:23:09,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:23:09,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:23:09,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:23:09,253 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:23:09,256 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:23:09,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/email_spec4_productSimulator.cil.c [2021-11-19 13:23:09,366 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/data/39cd071cb/0b0d06a0de0543cb8689879913138278/FLAGc37ce6e28 [2021-11-19 13:23:10,384 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:23:10,385 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/sv-benchmarks/c/product-lines/email_spec4_productSimulator.cil.c [2021-11-19 13:23:10,424 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/data/39cd071cb/0b0d06a0de0543cb8689879913138278/FLAGc37ce6e28 [2021-11-19 13:23:10,455 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/data/39cd071cb/0b0d06a0de0543cb8689879913138278 [2021-11-19 13:23:10,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:23:10,460 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:23:10,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:23:10,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:23:10,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:23:10,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:23:10" (1/1) ... [2021-11-19 13:23:10,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@306b0d25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:10, skipping insertion in model container [2021-11-19 13:23:10,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:23:10" (1/1) ... [2021-11-19 13:23:10,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:23:10,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:23:11,123 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/sv-benchmarks/c/product-lines/email_spec4_productSimulator.cil.c[18883,18896] [2021-11-19 13:23:11,498 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:23:11,529 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:23:11,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:23:11,604 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/sv-benchmarks/c/product-lines/email_spec4_productSimulator.cil.c[18883,18896] [2021-11-19 13:23:11,772 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:23:11,784 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:23:11,828 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/sv-benchmarks/c/product-lines/email_spec4_productSimulator.cil.c[18883,18896] [2021-11-19 13:23:11,913 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:23:11,974 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:23:11,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:11 WrapperNode [2021-11-19 13:23:11,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:23:11,976 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:23:11,977 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:23:11,977 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:23:11,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:11" (1/1) ... [2021-11-19 13:23:12,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:11" (1/1) ... [2021-11-19 13:23:12,160 INFO L137 Inliner]: procedures = 153, calls = 283, calls flagged for inlining = 67, calls inlined = 64, statements flattened = 1236 [2021-11-19 13:23:12,161 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:23:12,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:23:12,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:23:12,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:23:12,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:11" (1/1) ... [2021-11-19 13:23:12,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:11" (1/1) ... [2021-11-19 13:23:12,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:11" (1/1) ... [2021-11-19 13:23:12,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:11" (1/1) ... [2021-11-19 13:23:12,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:11" (1/1) ... [2021-11-19 13:23:12,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:11" (1/1) ... [2021-11-19 13:23:12,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:11" (1/1) ... [2021-11-19 13:23:12,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:23:12,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:23:12,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:23:12,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:23:12,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:11" (1/1) ... [2021-11-19 13:23:12,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:23:12,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:23:12,411 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:23:12,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:23:12,489 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2021-11-19 13:23:12,489 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2021-11-19 13:23:12,490 INFO L130 BoogieDeclarations]: Found specification of procedure setup_chuck__before__Keys [2021-11-19 13:23:12,490 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_chuck__before__Keys [2021-11-19 13:23:12,491 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Sign [2021-11-19 13:23:12,491 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Sign [2021-11-19 13:23:12,491 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookSize [2021-11-19 13:23:12,491 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookSize [2021-11-19 13:23:12,492 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2021-11-19 13:23:12,492 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2021-11-19 13:23:12,492 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookAddress [2021-11-19 13:23:12,492 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookAddress [2021-11-19 13:23:12,493 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2021-11-19 13:23:12,494 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2021-11-19 13:23:12,494 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Verify [2021-11-19 13:23:12,494 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Verify [2021-11-19 13:23:12,495 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-11-19 13:23:12,495 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-11-19 13:23:12,495 INFO L130 BoogieDeclarations]: Found specification of procedure setup_bob__before__Keys [2021-11-19 13:23:12,495 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_bob__before__Keys [2021-11-19 13:23:12,496 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-11-19 13:23:12,497 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-11-19 13:23:12,497 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-11-19 13:23:12,497 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-11-19 13:23:12,497 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2021-11-19 13:23:12,498 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2021-11-19 13:23:12,498 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Decrypt [2021-11-19 13:23:12,498 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Decrypt [2021-11-19 13:23:12,498 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Encrypt [2021-11-19 13:23:12,499 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Encrypt [2021-11-19 13:23:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2021-11-19 13:23:12,499 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2021-11-19 13:23:12,500 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2021-11-19 13:23:12,500 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2021-11-19 13:23:12,501 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2021-11-19 13:23:12,501 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2021-11-19 13:23:12,501 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-19 13:23:12,502 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Forward [2021-11-19 13:23:12,502 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Forward [2021-11-19 13:23:12,502 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2021-11-19 13:23:12,502 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2021-11-19 13:23:12,503 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2021-11-19 13:23:12,503 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2021-11-19 13:23:12,503 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-11-19 13:23:12,504 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-11-19 13:23:12,504 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable__before__Encrypt [2021-11-19 13:23:12,504 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable__before__Encrypt [2021-11-19 13:23:12,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:23:12,505 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2021-11-19 13:23:12,507 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2021-11-19 13:23:12,507 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2021-11-19 13:23:12,508 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2021-11-19 13:23:12,509 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__AddressBook [2021-11-19 13:23:12,509 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__AddressBook [2021-11-19 13:23:12,509 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Encrypt [2021-11-19 13:23:12,510 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Encrypt [2021-11-19 13:23:12,510 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__AutoResponder [2021-11-19 13:23:12,510 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__AutoResponder [2021-11-19 13:23:12,511 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookSize [2021-11-19 13:23:12,511 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookSize [2021-11-19 13:23:12,512 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2021-11-19 13:23:12,512 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2021-11-19 13:23:12,512 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2021-11-19 13:23:12,512 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2021-11-19 13:23:12,513 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-11-19 13:23:12,513 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-11-19 13:23:12,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:23:12,513 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2021-11-19 13:23:12,514 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2021-11-19 13:23:12,514 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-11-19 13:23:12,514 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-11-19 13:23:12,514 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2021-11-19 13:23:12,514 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2021-11-19 13:23:12,515 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rjh__before__Keys [2021-11-19 13:23:12,515 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rjh__before__Keys [2021-11-19 13:23:12,515 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Verify [2021-11-19 13:23:12,515 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Verify [2021-11-19 13:23:12,516 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2021-11-19 13:23:12,516 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2021-11-19 13:23:12,516 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-11-19 13:23:12,516 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-11-19 13:23:12,516 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2021-11-19 13:23:12,517 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2021-11-19 13:23:12,517 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Sign [2021-11-19 13:23:12,518 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Sign [2021-11-19 13:23:12,518 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2021-11-19 13:23:12,519 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2021-11-19 13:23:12,519 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookAddress [2021-11-19 13:23:12,519 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookAddress [2021-11-19 13:23:12,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:23:12,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:23:13,055 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:23:13,061 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:23:14,479 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:23:14,509 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:23:14,509 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:23:14,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:23:14 BoogieIcfgContainer [2021-11-19 13:23:14,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:23:14,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:23:14,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:23:14,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:23:14,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:23:10" (1/3) ... [2021-11-19 13:23:14,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef1ba44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:23:14, skipping insertion in model container [2021-11-19 13:23:14,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:23:11" (2/3) ... [2021-11-19 13:23:14,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef1ba44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:23:14, skipping insertion in model container [2021-11-19 13:23:14,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:23:14" (3/3) ... [2021-11-19 13:23:14,530 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec4_productSimulator.cil.c [2021-11-19 13:23:14,539 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:23:14,541 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:23:14,638 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:23:14,666 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 13:23:14,666 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:23:14,734 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) [2021-11-19 13:23:14,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 13:23:14,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:14,763 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] [2021-11-19 13:23:14,764 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:14,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:14,772 INFO L85 PathProgramCache]: Analyzing trace with hash -567184417, now seen corresponding path program 1 times [2021-11-19 13:23:14,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:14,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152346211] [2021-11-19 13:23:14,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:14,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:14,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:14,797 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:14,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:23:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:15,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 13:23:15,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:15,948 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 13:23:15,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 13:23:16,405 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:16,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152346211] [2021-11-19 13:23:16,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152346211] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:16,407 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:16,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 13:23:16,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700064933] [2021-11-19 13:23:16,411 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:16,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:23:16,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:16,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:23:16,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:23:16,462 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 39.5) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 13:23:16,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:16,585 INFO L93 Difference]: Finished difference Result 937 states and 1377 transitions. [2021-11-19 13:23:16,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:23:16,591 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 39.5) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 133 [2021-11-19 13:23:16,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:16,632 INFO L225 Difference]: With dead ends: 937 [2021-11-19 13:23:16,633 INFO L226 Difference]: Without dead ends: 596 [2021-11-19 13:23:16,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:23:16,653 INFO L933 BasicCegarLoop]: 895 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:16,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:23:16,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-11-19 13:23:16,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2021-11-19 13:23:16,842 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) [2021-11-19 13:23:16,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 887 transitions. [2021-11-19 13:23:16,862 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 887 transitions. Word has length 133 [2021-11-19 13:23:16,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:16,864 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 887 transitions. [2021-11-19 13:23:16,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 39.5) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 13:23:16,865 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 887 transitions. [2021-11-19 13:23:16,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 13:23:16,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:16,884 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] [2021-11-19 13:23:16,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:17,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:17,104 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:17,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:17,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1887142888, now seen corresponding path program 1 times [2021-11-19 13:23:17,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:17,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712429568] [2021-11-19 13:23:17,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:17,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:17,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:17,110 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:17,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:23:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:17,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:23:17,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 13:23:18,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 13:23:18,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:18,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712429568] [2021-11-19 13:23:18,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [712429568] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:18,385 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:18,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-19 13:23:18,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197774907] [2021-11-19 13:23:18,393 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:18,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:23:18,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:18,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:23:18,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:23:18,399 INFO L87 Difference]: Start difference. First operand 596 states and 887 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-19 13:23:18,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:18,554 INFO L93 Difference]: Finished difference Result 1156 states and 1718 transitions. [2021-11-19 13:23:18,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:23:18,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 134 [2021-11-19 13:23:18,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:18,574 INFO L225 Difference]: With dead ends: 1156 [2021-11-19 13:23:18,575 INFO L226 Difference]: Without dead ends: 596 [2021-11-19 13:23:18,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:23:18,580 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 3 mSDsluCounter, 2644 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3529 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:18,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 3529 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:23:18,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-11-19 13:23:18,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2021-11-19 13:23:18,616 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) [2021-11-19 13:23:18,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 880 transitions. [2021-11-19 13:23:18,624 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 880 transitions. Word has length 134 [2021-11-19 13:23:18,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:18,625 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 880 transitions. [2021-11-19 13:23:18,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-19 13:23:18,626 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 880 transitions. [2021-11-19 13:23:18,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 13:23:18,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:18,631 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] [2021-11-19 13:23:18,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:18,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:18,853 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:18,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:18,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1817414579, now seen corresponding path program 1 times [2021-11-19 13:23:18,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:18,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842253150] [2021-11-19 13:23:18,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:18,856 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:18,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:18,857 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:18,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:23:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:19,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:23:19,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-19 13:23:19,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:20,011 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 13:23:20,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:20,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842253150] [2021-11-19 13:23:20,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842253150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:20,024 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:20,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:23:20,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017439906] [2021-11-19 13:23:20,025 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:20,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:23:20,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:20,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:23:20,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:23:20,040 INFO L87 Difference]: Start difference. First operand 596 states and 880 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 4 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33) [2021-11-19 13:23:20,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:20,146 INFO L93 Difference]: Finished difference Result 1162 states and 1731 transitions. [2021-11-19 13:23:20,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:23:20,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 4 states have call successors, (38), 3 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 139 [2021-11-19 13:23:20,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:20,154 INFO L225 Difference]: With dead ends: 1162 [2021-11-19 13:23:20,154 INFO L226 Difference]: Without dead ends: 597 [2021-11-19 13:23:20,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:23:20,159 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 841 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:20,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 905 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:23:20,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-11-19 13:23:20,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 597. [2021-11-19 13:23:20,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 444 states have (on average 1.4842342342342343) internal successors, (659), 461 states have internal predecessors, (659), 108 states have call successors, (108), 44 states have call predecessors, (108), 44 states have return successors, (107), 106 states have call predecessors, (107), 107 states have call successors, (107) [2021-11-19 13:23:20,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 874 transitions. [2021-11-19 13:23:20,210 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 874 transitions. Word has length 139 [2021-11-19 13:23:20,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:20,211 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 874 transitions. [2021-11-19 13:23:20,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 4 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33) [2021-11-19 13:23:20,212 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 874 transitions. [2021-11-19 13:23:20,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-19 13:23:20,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:20,217 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 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] [2021-11-19 13:23:20,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:20,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:20,443 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:20,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:20,444 INFO L85 PathProgramCache]: Analyzing trace with hash -633923939, now seen corresponding path program 1 times [2021-11-19 13:23:20,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:20,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1489649057] [2021-11-19 13:23:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:20,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:20,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:20,448 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:20,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:23:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:21,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:23:21,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-19 13:23:21,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-19 13:23:21,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:21,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1489649057] [2021-11-19 13:23:21,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1489649057] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:21,692 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:21,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:23:21,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453741273] [2021-11-19 13:23:21,693 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:21,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:23:21,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:21,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:23:21,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:23:21,696 INFO L87 Difference]: Start difference. First operand 597 states and 874 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2021-11-19 13:23:21,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:21,786 INFO L93 Difference]: Finished difference Result 1156 states and 1710 transitions. [2021-11-19 13:23:21,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:23:21,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 [2021-11-19 13:23:21,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:21,798 INFO L225 Difference]: With dead ends: 1156 [2021-11-19 13:23:21,798 INFO L226 Difference]: Without dead ends: 595 [2021-11-19 13:23:21,804 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 [2021-11-19 13:23:21,811 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 824 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:21,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 900 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:23:21,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-19 13:23:21,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2021-11-19 13:23:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 444 states have (on average 1.4774774774774775) internal successors, (656), 459 states have internal predecessors, (656), 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) [2021-11-19 13:23:21,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 867 transitions. [2021-11-19 13:23:21,873 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 867 transitions. Word has length 149 [2021-11-19 13:23:21,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:21,874 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 867 transitions. [2021-11-19 13:23:21,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2021-11-19 13:23:21,875 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 867 transitions. [2021-11-19 13:23:21,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-19 13:23:21,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:21,880 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 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] [2021-11-19 13:23:21,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:22,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:22,097 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:22,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:22,098 INFO L85 PathProgramCache]: Analyzing trace with hash 982930644, now seen corresponding path program 1 times [2021-11-19 13:23:22,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:22,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146053844] [2021-11-19 13:23:22,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:22,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:22,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:22,102 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:22,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:23:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:22,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:23:22,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-19 13:23:22,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-19 13:23:23,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:23,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146053844] [2021-11-19 13:23:23,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146053844] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:23,449 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:23,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:23:23,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627976756] [2021-11-19 13:23:23,450 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:23,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:23:23,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:23,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:23:23,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:23:23,452 INFO L87 Difference]: Start difference. First operand 595 states and 867 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2021-11-19 13:23:23,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:23,579 INFO L93 Difference]: Finished difference Result 1147 states and 1676 transitions. [2021-11-19 13:23:23,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:23:23,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 [2021-11-19 13:23:23,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:23,586 INFO L225 Difference]: With dead ends: 1147 [2021-11-19 13:23:23,586 INFO L226 Difference]: Without dead ends: 598 [2021-11-19 13:23:23,589 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 [2021-11-19 13:23:23,590 INFO L933 BasicCegarLoop]: 842 mSDtfsCounter, 804 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:23,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 883 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:23:23,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-19 13:23:23,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 592. [2021-11-19 13:23:23,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 444 states have (on average 1.4527027027027026) internal successors, (645), 454 states have internal predecessors, (645), 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) [2021-11-19 13:23:23,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 850 transitions. [2021-11-19 13:23:23,646 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 850 transitions. Word has length 150 [2021-11-19 13:23:23,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:23,647 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 850 transitions. [2021-11-19 13:23:23,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2021-11-19 13:23:23,648 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 850 transitions. [2021-11-19 13:23:23,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-19 13:23:23,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:23,653 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 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] [2021-11-19 13:23:23,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:23,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:23,874 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:23,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:23,874 INFO L85 PathProgramCache]: Analyzing trace with hash 45386734, now seen corresponding path program 1 times [2021-11-19 13:23:23,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:23,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481093137] [2021-11-19 13:23:23,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:23,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:23,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:23,877 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:23,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:23:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:24,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:23:24,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-19 13:23:24,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-19 13:23:25,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:25,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1481093137] [2021-11-19 13:23:25,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1481093137] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:23:25,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:23:25,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2021-11-19 13:23:25,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991608101] [2021-11-19 13:23:25,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:25,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:23:25,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:25,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:23:25,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:23:25,385 INFO L87 Difference]: Start difference. First operand 592 states and 850 transitions. Second operand has 8 states, 6 states have (on average 15.666666666666666) internal successors, (94), 8 states have internal predecessors, (94), 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) [2021-11-19 13:23:25,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:25,738 INFO L93 Difference]: Finished difference Result 1131 states and 1637 transitions. [2021-11-19 13:23:25,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:23:25,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 15.666666666666666) internal successors, (94), 8 states have internal predecessors, (94), 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 [2021-11-19 13:23:25,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:25,745 INFO L225 Difference]: With dead ends: 1131 [2021-11-19 13:23:25,746 INFO L226 Difference]: Without dead ends: 594 [2021-11-19 13:23:25,753 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 [2021-11-19 13:23:25,755 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 363 mSDsluCounter, 4613 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 5450 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:25,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 5450 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:23:25,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-19 13:23:25,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 594. [2021-11-19 13:23:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 445 states have (on average 1.451685393258427) internal successors, (646), 456 states have internal predecessors, (646), 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) [2021-11-19 13:23:25,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 853 transitions. [2021-11-19 13:23:25,816 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 853 transitions. Word has length 168 [2021-11-19 13:23:25,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:25,817 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 853 transitions. [2021-11-19 13:23:25,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 15.666666666666666) internal successors, (94), 8 states have internal predecessors, (94), 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) [2021-11-19 13:23:25,817 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 853 transitions. [2021-11-19 13:23:25,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-19 13:23:25,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:25,824 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 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] [2021-11-19 13:23:25,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:26,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:26,038 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:26,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:26,038 INFO L85 PathProgramCache]: Analyzing trace with hash -677250082, now seen corresponding path program 1 times [2021-11-19 13:23:26,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:26,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131416347] [2021-11-19 13:23:26,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:26,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:26,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:26,042 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:26,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:23:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:26,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:23:26,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-19 13:23:26,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-19 13:23:27,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:27,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131416347] [2021-11-19 13:23:27,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131416347] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:23:27,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:23:27,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-19 13:23:27,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377138556] [2021-11-19 13:23:27,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:27,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:23:27,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:27,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:23:27,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:23:27,472 INFO L87 Difference]: Start difference. First operand 594 states and 853 transitions. Second operand has 6 states, 5 states have (on average 19.2) internal successors, (96), 6 states have internal predecessors, (96), 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) [2021-11-19 13:23:27,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:27,753 INFO L93 Difference]: Finished difference Result 1132 states and 1640 transitions. [2021-11-19 13:23:27,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:23:27,754 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.2) internal successors, (96), 6 states have internal predecessors, (96), 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 [2021-11-19 13:23:27,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:27,761 INFO L225 Difference]: With dead ends: 1132 [2021-11-19 13:23:27,762 INFO L226 Difference]: Without dead ends: 596 [2021-11-19 13:23:27,764 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 [2021-11-19 13:23:27,766 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 361 mSDsluCounter, 2940 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 3776 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:27,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 3776 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:23:27,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-11-19 13:23:27,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2021-11-19 13:23:27,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 446 states have (on average 1.4506726457399104) internal successors, (647), 458 states have internal predecessors, (647), 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) [2021-11-19 13:23:27,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 858 transitions. [2021-11-19 13:23:27,830 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 858 transitions. Word has length 169 [2021-11-19 13:23:27,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:27,832 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 858 transitions. [2021-11-19 13:23:27,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.2) internal successors, (96), 6 states have internal predecessors, (96), 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) [2021-11-19 13:23:27,833 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 858 transitions. [2021-11-19 13:23:27,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-19 13:23:27,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:27,838 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 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] [2021-11-19 13:23:27,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:28,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:28,051 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:28,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:28,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1959391511, now seen corresponding path program 1 times [2021-11-19 13:23:28,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:28,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73792869] [2021-11-19 13:23:28,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:28,053 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:28,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:28,054 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:28,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:23:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:28,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:23:28,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-19 13:23:28,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-19 13:23:29,519 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:29,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73792869] [2021-11-19 13:23:29,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73792869] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:29,520 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:29,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 13:23:29,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580066897] [2021-11-19 13:23:29,521 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:29,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 13:23:29,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:29,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 13:23:29,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:23:29,525 INFO L87 Difference]: Start difference. First operand 596 states and 858 transitions. Second operand has 12 states, 8 states have (on average 14.0) internal successors, (112), 12 states have internal predecessors, (112), 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) [2021-11-19 13:23:29,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:29,901 INFO L93 Difference]: Finished difference Result 1120 states and 1626 transitions. [2021-11-19 13:23:29,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:23:29,903 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 14.0) internal successors, (112), 12 states have internal predecessors, (112), 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 170 [2021-11-19 13:23:29,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:29,909 INFO L225 Difference]: With dead ends: 1120 [2021-11-19 13:23:29,910 INFO L226 Difference]: Without dead ends: 596 [2021-11-19 13:23:29,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:23:29,913 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 538 mSDsluCounter, 5267 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 6104 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:29,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 6104 Invalid, 144 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [60 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:23:29,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-11-19 13:23:29,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2021-11-19 13:23:29,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 446 states have (on average 1.4506726457399104) internal successors, (647), 458 states have internal predecessors, (647), 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) [2021-11-19 13:23:29,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 857 transitions. [2021-11-19 13:23:29,966 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 857 transitions. Word has length 170 [2021-11-19 13:23:29,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:29,967 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 857 transitions. [2021-11-19 13:23:29,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 14.0) internal successors, (112), 12 states have internal predecessors, (112), 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) [2021-11-19 13:23:29,968 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 857 transitions. [2021-11-19 13:23:29,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-19 13:23:29,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:29,973 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 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] [2021-11-19 13:23:29,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:30,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:30,190 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:30,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:30,190 INFO L85 PathProgramCache]: Analyzing trace with hash 649688403, now seen corresponding path program 2 times [2021-11-19 13:23:30,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:30,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1907806193] [2021-11-19 13:23:30,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:23:30,191 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:30,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:30,192 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:30,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:23:30,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-19 13:23:30,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:23:30,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:23:30,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:23:31,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:23:31,697 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:31,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1907806193] [2021-11-19 13:23:31,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1907806193] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:31,697 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:31,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-11-19 13:23:31,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178565939] [2021-11-19 13:23:31,698 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:31,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 13:23:31,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:31,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 13:23:31,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:23:31,701 INFO L87 Difference]: Start difference. First operand 596 states and 857 transitions. Second operand has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 12 states have internal predecessors, (137), 3 states have call successors, (39), 3 states have call predecessors, (39), 6 states have return successors, (30), 5 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-19 13:23:35,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:35,295 INFO L93 Difference]: Finished difference Result 1899 states and 2806 transitions. [2021-11-19 13:23:35,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 13:23:35,296 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 12 states have internal predecessors, (137), 3 states have call successors, (39), 3 states have call predecessors, (39), 6 states have return successors, (30), 5 states have call predecessors, (30), 3 states have call successors, (30) Word has length 171 [2021-11-19 13:23:35,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:35,315 INFO L225 Difference]: With dead ends: 1899 [2021-11-19 13:23:35,316 INFO L226 Difference]: Without dead ends: 1895 [2021-11-19 13:23:35,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-11-19 13:23:35,322 INFO L933 BasicCegarLoop]: 1274 mSDtfsCounter, 1851 mSDsluCounter, 10602 mSDsCounter, 0 mSdLazyCounter, 1534 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1889 SdHoareTripleChecker+Valid, 11876 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:35,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1889 Valid, 11876 Invalid, 1629 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [95 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-19 13:23:35,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-11-19 13:23:35,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1342. [2021-11-19 13:23:35,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1028 states have (on average 1.4922178988326849) internal successors, (1534), 1048 states have internal predecessors, (1534), 216 states have call successors, (216), 94 states have call predecessors, (216), 97 states have return successors, (231), 215 states have call predecessors, (231), 214 states have call successors, (231) [2021-11-19 13:23:35,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1981 transitions. [2021-11-19 13:23:35,493 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1981 transitions. Word has length 171 [2021-11-19 13:23:35,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:35,494 INFO L470 AbstractCegarLoop]: Abstraction has 1342 states and 1981 transitions. [2021-11-19 13:23:35,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 12 states have internal predecessors, (137), 3 states have call successors, (39), 3 states have call predecessors, (39), 6 states have return successors, (30), 5 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-19 13:23:35,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1981 transitions. [2021-11-19 13:23:35,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-19 13:23:35,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:35,504 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 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] [2021-11-19 13:23:35,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:35,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:35,720 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:35,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:35,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1911013992, now seen corresponding path program 1 times [2021-11-19 13:23:35,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:35,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998181829] [2021-11-19 13:23:35,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:35,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:35,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:35,724 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:35,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:23:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:36,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:23:36,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-19 13:23:36,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-19 13:23:37,236 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:37,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998181829] [2021-11-19 13:23:37,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998181829] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:37,237 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:37,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 13:23:37,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16502153] [2021-11-19 13:23:37,237 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:37,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 13:23:37,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:37,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 13:23:37,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:23:37,239 INFO L87 Difference]: Start difference. First operand 1342 states and 1981 transitions. Second operand has 12 states, 8 states have (on average 14.75) internal successors, (118), 12 states have internal predecessors, (118), 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) [2021-11-19 13:23:37,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:37,607 INFO L93 Difference]: Finished difference Result 2595 states and 3855 transitions. [2021-11-19 13:23:37,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:23:37,608 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 14.75) internal successors, (118), 12 states have internal predecessors, (118), 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 172 [2021-11-19 13:23:37,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:37,621 INFO L225 Difference]: With dead ends: 2595 [2021-11-19 13:23:37,622 INFO L226 Difference]: Without dead ends: 1346 [2021-11-19 13:23:37,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:23:37,629 INFO L933 BasicCegarLoop]: 838 mSDtfsCounter, 361 mSDsluCounter, 5086 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 5924 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:37,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 5924 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:23:37,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2021-11-19 13:23:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1346. [2021-11-19 13:23:37,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1030 states have (on average 1.4912621359223301) internal successors, (1536), 1052 states have internal predecessors, (1536), 216 states have call successors, (216), 94 states have call predecessors, (216), 99 states have return successors, (234), 215 states have call predecessors, (234), 214 states have call successors, (234) [2021-11-19 13:23:37,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 1986 transitions. [2021-11-19 13:23:37,804 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 1986 transitions. Word has length 172 [2021-11-19 13:23:37,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:37,806 INFO L470 AbstractCegarLoop]: Abstraction has 1346 states and 1986 transitions. [2021-11-19 13:23:37,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 14.75) internal successors, (118), 12 states have internal predecessors, (118), 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) [2021-11-19 13:23:37,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 1986 transitions. [2021-11-19 13:23:37,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-19 13:23:37,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:37,814 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 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] [2021-11-19 13:23:37,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:38,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:38,035 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:38,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:38,036 INFO L85 PathProgramCache]: Analyzing trace with hash -944831863, now seen corresponding path program 1 times [2021-11-19 13:23:38,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:38,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395622537] [2021-11-19 13:23:38,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:38,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:38,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:38,039 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:38,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:23:38,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:38,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:23:38,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-19 13:23:38,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-19 13:23:39,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:39,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395622537] [2021-11-19 13:23:39,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395622537] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:39,501 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:39,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-19 13:23:39,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464103640] [2021-11-19 13:23:39,502 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:39,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:23:39,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:39,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:23:39,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:23:39,504 INFO L87 Difference]: Start difference. First operand 1346 states and 1986 transitions. Second operand has 10 states, 7 states have (on average 16.857142857142858) internal successors, (118), 10 states have internal predecessors, (118), 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) [2021-11-19 13:23:39,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:39,924 INFO L93 Difference]: Finished difference Result 2599 states and 3860 transitions. [2021-11-19 13:23:39,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:23:39,926 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 16.857142857142858) internal successors, (118), 10 states have internal predecessors, (118), 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 173 [2021-11-19 13:23:39,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:39,947 INFO L225 Difference]: With dead ends: 2599 [2021-11-19 13:23:39,948 INFO L226 Difference]: Without dead ends: 1350 [2021-11-19 13:23:39,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:23:39,955 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 357 mSDsluCounter, 4623 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 5460 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:39,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 5460 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:23:39,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-11-19 13:23:40,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1346. [2021-11-19 13:23:40,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1030 states have (on average 1.4912621359223301) internal successors, (1536), 1052 states have internal predecessors, (1536), 216 states have call successors, (216), 94 states have call predecessors, (216), 99 states have return successors, (234), 215 states have call predecessors, (234), 214 states have call successors, (234) [2021-11-19 13:23:40,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 1986 transitions. [2021-11-19 13:23:40,084 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 1986 transitions. Word has length 173 [2021-11-19 13:23:40,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:40,087 INFO L470 AbstractCegarLoop]: Abstraction has 1346 states and 1986 transitions. [2021-11-19 13:23:40,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 16.857142857142858) internal successors, (118), 10 states have internal predecessors, (118), 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) [2021-11-19 13:23:40,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 1986 transitions. [2021-11-19 13:23:40,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-19 13:23:40,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:40,097 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 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] [2021-11-19 13:23:40,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:40,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:40,314 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:40,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:40,315 INFO L85 PathProgramCache]: Analyzing trace with hash 966210695, now seen corresponding path program 1 times [2021-11-19 13:23:40,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:40,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796789344] [2021-11-19 13:23:40,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:40,316 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:40,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:40,318 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:40,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:23:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:40,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:23:40,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-19 13:23:41,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-19 13:23:41,649 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:41,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796789344] [2021-11-19 13:23:41,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796789344] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:41,649 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:41,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-19 13:23:41,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905489768] [2021-11-19 13:23:41,650 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:41,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 13:23:41,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:41,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 13:23:41,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:23:41,653 INFO L87 Difference]: Start difference. First operand 1346 states and 1986 transitions. Second operand has 9 states, 7 states have (on average 16.285714285714285) internal successors, (114), 9 states have internal predecessors, (114), 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) [2021-11-19 13:23:41,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:41,960 INFO L93 Difference]: Finished difference Result 2196 states and 3206 transitions. [2021-11-19 13:23:41,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:23:41,961 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 16.285714285714285) internal successors, (114), 9 states have internal predecessors, (114), 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 173 [2021-11-19 13:23:41,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:41,972 INFO L225 Difference]: With dead ends: 2196 [2021-11-19 13:23:41,973 INFO L226 Difference]: Without dead ends: 1151 [2021-11-19 13:23:41,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:23:41,979 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 355 mSDsluCounter, 5066 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 5902 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:41,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 5902 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:23:41,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-11-19 13:23:42,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1151. [2021-11-19 13:23:42,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 864 states have (on average 1.4641203703703705) internal successors, (1265), 887 states have internal predecessors, (1265), 195 states have call successors, (195), 86 states have call predecessors, (195), 91 states have return successors, (207), 193 states have call predecessors, (207), 193 states have call successors, (207) [2021-11-19 13:23:42,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1667 transitions. [2021-11-19 13:23:42,078 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1667 transitions. Word has length 173 [2021-11-19 13:23:42,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:42,079 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 1667 transitions. [2021-11-19 13:23:42,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 16.285714285714285) internal successors, (114), 9 states have internal predecessors, (114), 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) [2021-11-19 13:23:42,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1667 transitions. [2021-11-19 13:23:42,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-19 13:23:42,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:42,086 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:42,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:42,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:42,307 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:42,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:42,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1993361392, now seen corresponding path program 2 times [2021-11-19 13:23:42,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:42,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436272013] [2021-11-19 13:23:42,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:23:42,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:42,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:42,310 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:42,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:23:42,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-19 13:23:42,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:23:42,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:23:42,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:23:43,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:23:43,701 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:43,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436272013] [2021-11-19 13:23:43,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436272013] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:43,701 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:43,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-11-19 13:23:43,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186632322] [2021-11-19 13:23:43,702 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:43,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 13:23:43,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:43,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 13:23:43,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:23:43,708 INFO L87 Difference]: Start difference. First operand 1151 states and 1667 transitions. Second operand has 14 states, 14 states have (on average 10.214285714285714) internal successors, (143), 12 states have internal predecessors, (143), 3 states have call successors, (39), 3 states have call predecessors, (39), 6 states have return successors, (30), 5 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-19 13:23:47,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:47,245 INFO L93 Difference]: Finished difference Result 3768 states and 5606 transitions. [2021-11-19 13:23:47,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 13:23:47,246 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.214285714285714) internal successors, (143), 12 states have internal predecessors, (143), 3 states have call successors, (39), 3 states have call predecessors, (39), 6 states have return successors, (30), 5 states have call predecessors, (30), 3 states have call successors, (30) Word has length 174 [2021-11-19 13:23:47,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:47,285 INFO L225 Difference]: With dead ends: 3768 [2021-11-19 13:23:47,285 INFO L226 Difference]: Without dead ends: 3762 [2021-11-19 13:23:47,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-11-19 13:23:47,290 INFO L933 BasicCegarLoop]: 2001 mSDtfsCounter, 1783 mSDsluCounter, 15420 mSDsCounter, 0 mSdLazyCounter, 1761 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1816 SdHoareTripleChecker+Valid, 17421 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:47,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1816 Valid, 17421 Invalid, 1930 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [169 Valid, 1761 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-19 13:23:47,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3762 states. [2021-11-19 13:23:47,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3762 to 2654. [2021-11-19 13:23:47,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2654 states, 2035 states have (on average 1.4972972972972973) internal successors, (3047), 2081 states have internal predecessors, (3047), 418 states have call successors, (418), 186 states have call predecessors, (418), 200 states have return successors, (475), 418 states have call predecessors, (475), 414 states have call successors, (475) [2021-11-19 13:23:47,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3940 transitions. [2021-11-19 13:23:47,670 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3940 transitions. Word has length 174 [2021-11-19 13:23:47,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:47,671 INFO L470 AbstractCegarLoop]: Abstraction has 2654 states and 3940 transitions. [2021-11-19 13:23:47,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.214285714285714) internal successors, (143), 12 states have internal predecessors, (143), 3 states have call successors, (39), 3 states have call predecessors, (39), 6 states have return successors, (30), 5 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-19 13:23:47,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3940 transitions. [2021-11-19 13:23:47,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-19 13:23:47,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:47,686 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 13:23:47,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:47,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:47,901 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:47,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:47,902 INFO L85 PathProgramCache]: Analyzing trace with hash 11639348, now seen corresponding path program 1 times [2021-11-19 13:23:47,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:47,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009660837] [2021-11-19 13:23:47,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:47,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:47,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:47,904 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:47,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 13:23:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:48,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:23:48,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:48,735 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-19 13:23:48,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-19 13:23:49,129 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:49,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009660837] [2021-11-19 13:23:49,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009660837] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:23:49,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:23:49,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-11-19 13:23:49,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066508367] [2021-11-19 13:23:49,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:49,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:23:49,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:49,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:23:49,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:23:49,131 INFO L87 Difference]: Start difference. First operand 2654 states and 3940 transitions. Second operand has 6 states, 5 states have (on average 19.2) internal successors, (96), 6 states have internal predecessors, (96), 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) [2021-11-19 13:23:49,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:49,474 INFO L93 Difference]: Finished difference Result 3920 states and 5825 transitions. [2021-11-19 13:23:49,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:23:49,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.2) internal successors, (96), 6 states have internal predecessors, (96), 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 174 [2021-11-19 13:23:49,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:49,500 INFO L225 Difference]: With dead ends: 3920 [2021-11-19 13:23:49,501 INFO L226 Difference]: Without dead ends: 2601 [2021-11-19 13:23:49,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:23:49,509 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 369 mSDsluCounter, 2934 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 3771 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:49,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 3771 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:23:49,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-11-19 13:23:49,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2597. [2021-11-19 13:23:49,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 1998 states have (on average 1.5055055055055055) internal successors, (3008), 2044 states have internal predecessors, (3008), 406 states have call successors, (406), 181 states have call predecessors, (406), 192 states have return successors, (453), 403 states have call predecessors, (453), 402 states have call successors, (453) [2021-11-19 13:23:49,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 3867 transitions. [2021-11-19 13:23:49,793 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 3867 transitions. Word has length 174 [2021-11-19 13:23:49,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:49,794 INFO L470 AbstractCegarLoop]: Abstraction has 2597 states and 3867 transitions. [2021-11-19 13:23:49,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.2) internal successors, (96), 6 states have internal predecessors, (96), 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) [2021-11-19 13:23:49,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 3867 transitions. [2021-11-19 13:23:49,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-19 13:23:49,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:49,806 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 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] [2021-11-19 13:23:49,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:50,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:50,029 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:50,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:50,030 INFO L85 PathProgramCache]: Analyzing trace with hash -2126662409, now seen corresponding path program 1 times [2021-11-19 13:23:50,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:50,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261010374] [2021-11-19 13:23:50,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:50,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:50,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:50,032 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:50,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:23:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:50,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:23:50,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-19 13:23:50,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:51,280 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-19 13:23:51,281 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:51,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261010374] [2021-11-19 13:23:51,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261010374] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:51,281 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:51,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-19 13:23:51,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773329705] [2021-11-19 13:23:51,282 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:51,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 13:23:51,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:51,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 13:23:51,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:23:51,284 INFO L87 Difference]: Start difference. First operand 2597 states and 3867 transitions. Second operand has 9 states, 7 states have (on average 16.857142857142858) internal successors, (118), 9 states have internal predecessors, (118), 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) [2021-11-19 13:23:51,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:51,604 INFO L93 Difference]: Finished difference Result 4305 states and 6321 transitions. [2021-11-19 13:23:51,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:23:51,606 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 16.857142857142858) internal successors, (118), 9 states have internal predecessors, (118), 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 175 [2021-11-19 13:23:51,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:51,625 INFO L225 Difference]: With dead ends: 4305 [2021-11-19 13:23:51,625 INFO L226 Difference]: Without dead ends: 2202 [2021-11-19 13:23:51,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:23:51,634 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 706 mSDsluCounter, 2121 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 2958 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:51,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 2958 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:23:51,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-11-19 13:23:51,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 2202. [2021-11-19 13:23:51,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 1663 states have (on average 1.4792543595911005) internal successors, (2460), 1709 states have internal predecessors, (2460), 364 states have call successors, (364), 164 states have call predecessors, (364), 174 states have return successors, (395), 360 states have call predecessors, (395), 360 states have call successors, (395) [2021-11-19 13:23:51,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 3219 transitions. [2021-11-19 13:23:51,820 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 3219 transitions. Word has length 175 [2021-11-19 13:23:51,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:51,821 INFO L470 AbstractCegarLoop]: Abstraction has 2202 states and 3219 transitions. [2021-11-19 13:23:51,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 16.857142857142858) internal successors, (118), 9 states have internal predecessors, (118), 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) [2021-11-19 13:23:51,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 3219 transitions. [2021-11-19 13:23:51,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-19 13:23:51,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:51,830 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:51,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:52,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:52,050 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:52,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:52,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1758832827, now seen corresponding path program 1 times [2021-11-19 13:23:52,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:52,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506410811] [2021-11-19 13:23:52,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:52,052 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:52,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:52,053 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:52,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 13:23:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:52,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:23:52,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:23:52,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:23:53,148 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:53,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506410811] [2021-11-19 13:23:53,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506410811] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:53,148 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:53,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:23:53,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388354512] [2021-11-19 13:23:53,149 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:53,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:23:53,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:53,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:23:53,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:23:53,151 INFO L87 Difference]: Start difference. First operand 2202 states and 3219 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-19 13:23:53,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:53,449 INFO L93 Difference]: Finished difference Result 3778 states and 5470 transitions. [2021-11-19 13:23:53,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:23:53,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 197 [2021-11-19 13:23:53,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:53,474 INFO L225 Difference]: With dead ends: 3778 [2021-11-19 13:23:53,475 INFO L226 Difference]: Without dead ends: 2476 [2021-11-19 13:23:53,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:23:53,483 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 169 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:53,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 1883 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:23:53,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2021-11-19 13:23:53,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 2460. [2021-11-19 13:23:53,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 1887 states have (on average 1.4870164281928988) internal successors, (2806), 1927 states have internal predecessors, (2806), 398 states have call successors, (398), 164 states have call predecessors, (398), 174 states have return successors, (439), 400 states have call predecessors, (439), 394 states have call successors, (439) [2021-11-19 13:23:53,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 3643 transitions. [2021-11-19 13:23:53,738 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 3643 transitions. Word has length 197 [2021-11-19 13:23:53,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:53,741 INFO L470 AbstractCegarLoop]: Abstraction has 2460 states and 3643 transitions. [2021-11-19 13:23:53,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-19 13:23:53,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 3643 transitions. [2021-11-19 13:23:53,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-19 13:23:53,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:53,755 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:53,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:53,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:53,976 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:53,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:53,976 INFO L85 PathProgramCache]: Analyzing trace with hash -939921117, now seen corresponding path program 1 times [2021-11-19 13:23:53,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:53,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412835226] [2021-11-19 13:23:53,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:53,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:53,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:53,978 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:53,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:23:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:54,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:23:54,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:23:54,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:23:55,092 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:55,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412835226] [2021-11-19 13:23:55,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412835226] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:55,092 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:55,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:23:55,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034201488] [2021-11-19 13:23:55,093 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:55,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:23:55,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:55,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:23:55,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:23:55,094 INFO L87 Difference]: Start difference. First operand 2460 states and 3643 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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) [2021-11-19 13:23:55,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:55,294 INFO L93 Difference]: Finished difference Result 5148 states and 7696 transitions. [2021-11-19 13:23:55,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:23:55,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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 [2021-11-19 13:23:55,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:55,319 INFO L225 Difference]: With dead ends: 5148 [2021-11-19 13:23:55,320 INFO L226 Difference]: Without dead ends: 2856 [2021-11-19 13:23:55,330 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 [2021-11-19 13:23:55,331 INFO L933 BasicCegarLoop]: 867 mSDtfsCounter, 165 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:55,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 1664 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:23:55,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-11-19 13:23:55,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2824. [2021-11-19 13:23:55,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2824 states, 2195 states have (on average 1.4943052391799545) internal successors, (3280), 2235 states have internal predecessors, (3280), 454 states have call successors, (454), 164 states have call predecessors, (454), 174 states have return successors, (511), 456 states have call predecessors, (511), 450 states have call successors, (511) [2021-11-19 13:23:55,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 4245 transitions. [2021-11-19 13:23:55,626 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 4245 transitions. Word has length 188 [2021-11-19 13:23:55,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:55,629 INFO L470 AbstractCegarLoop]: Abstraction has 2824 states and 4245 transitions. [2021-11-19 13:23:55,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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) [2021-11-19 13:23:55,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 4245 transitions. [2021-11-19 13:23:55,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-19 13:23:55,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:55,641 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:55,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:55,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:55,870 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:55,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:55,870 INFO L85 PathProgramCache]: Analyzing trace with hash -2061696159, now seen corresponding path program 1 times [2021-11-19 13:23:55,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:55,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563407442] [2021-11-19 13:23:55,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:55,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:55,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:55,873 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:55,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 13:23:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:56,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:23:56,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:23:56,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:23:57,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:57,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563407442] [2021-11-19 13:23:57,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563407442] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:57,044 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:57,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:23:57,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256568716] [2021-11-19 13:23:57,047 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:57,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:23:57,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:57,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:23:57,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:23:57,049 INFO L87 Difference]: Start difference. First operand 2824 states and 4245 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-19 13:23:57,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:57,317 INFO L93 Difference]: Finished difference Result 6266 states and 9568 transitions. [2021-11-19 13:23:57,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:23:57,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 210 [2021-11-19 13:23:57,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:57,358 INFO L225 Difference]: With dead ends: 6266 [2021-11-19 13:23:57,359 INFO L226 Difference]: Without dead ends: 3632 [2021-11-19 13:23:57,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:23:57,372 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 163 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1710 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:57,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1710 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:23:57,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2021-11-19 13:23:57,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 3600. [2021-11-19 13:23:57,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3600 states, 2847 states have (on average 1.5096592904812083) internal successors, (4298), 2887 states have internal predecessors, (4298), 578 states have call successors, (578), 164 states have call predecessors, (578), 174 states have return successors, (667), 580 states have call predecessors, (667), 574 states have call successors, (667) [2021-11-19 13:23:57,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3600 states to 3600 states and 5543 transitions. [2021-11-19 13:23:57,750 INFO L78 Accepts]: Start accepts. Automaton has 3600 states and 5543 transitions. Word has length 210 [2021-11-19 13:23:57,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:57,751 INFO L470 AbstractCegarLoop]: Abstraction has 3600 states and 5543 transitions. [2021-11-19 13:23:57,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-19 13:23:57,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3600 states and 5543 transitions. [2021-11-19 13:23:57,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-19 13:23:57,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:57,768 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:57,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:57,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:57,988 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:57,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:57,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1436344621, now seen corresponding path program 1 times [2021-11-19 13:23:57,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:57,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510698857] [2021-11-19 13:23:57,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:57,990 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:57,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:57,993 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:58,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 13:23:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:58,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:23:58,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:58,843 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:23:58,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:23:59,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:59,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510698857] [2021-11-19 13:23:59,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510698857] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:59,314 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:59,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:23:59,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168644678] [2021-11-19 13:23:59,314 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:59,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:23:59,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:59,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:23:59,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:23:59,319 INFO L87 Difference]: Start difference. First operand 3600 states and 5543 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-19 13:23:59,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:59,758 INFO L93 Difference]: Finished difference Result 8558 states and 13396 transitions. [2021-11-19 13:23:59,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:23:59,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 211 [2021-11-19 13:23:59,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:59,792 INFO L225 Difference]: With dead ends: 8558 [2021-11-19 13:23:59,793 INFO L226 Difference]: Without dead ends: 5168 [2021-11-19 13:23:59,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:23:59,810 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 161 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:59,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 1704 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:23:59,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5168 states. [2021-11-19 13:24:00,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5168 to 5136. [2021-11-19 13:24:00,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5136 states, 4151 states have (on average 1.530233678631655) internal successors, (6352), 4191 states have internal predecessors, (6352), 810 states have call successors, (810), 164 states have call predecessors, (810), 174 states have return successors, (931), 812 states have call predecessors, (931), 806 states have call successors, (931) [2021-11-19 13:24:00,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5136 states to 5136 states and 8093 transitions. [2021-11-19 13:24:00,380 INFO L78 Accepts]: Start accepts. Automaton has 5136 states and 8093 transitions. Word has length 211 [2021-11-19 13:24:00,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:00,381 INFO L470 AbstractCegarLoop]: Abstraction has 5136 states and 8093 transitions. [2021-11-19 13:24:00,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-19 13:24:00,381 INFO L276 IsEmpty]: Start isEmpty. Operand 5136 states and 8093 transitions. [2021-11-19 13:24:00,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-19 13:24:00,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:00,407 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:24:00,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 13:24:00,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:24:00,629 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:24:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:00,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1486895738, now seen corresponding path program 1 times [2021-11-19 13:24:00,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:24:00,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575303084] [2021-11-19 13:24:00,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:00,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:24:00,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:24:00,633 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:24:00,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 13:24:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:01,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:24:01,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:24:01,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:24:01,880 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:01,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575303084] [2021-11-19 13:24:01,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575303084] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:24:01,880 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:24:01,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:24:01,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918110108] [2021-11-19 13:24:01,880 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:01,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:24:01,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:01,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:24:01,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:24:01,882 INFO L87 Difference]: Start difference. First operand 5136 states and 8093 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) [2021-11-19 13:24:02,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:02,404 INFO L93 Difference]: Finished difference Result 12952 states and 20762 transitions. [2021-11-19 13:24:02,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:24:02,404 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 191 [2021-11-19 13:24:02,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:02,444 INFO L225 Difference]: With dead ends: 12952 [2021-11-19 13:24:02,445 INFO L226 Difference]: Without dead ends: 8052 [2021-11-19 13:24:02,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:24:02,466 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 159 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1698 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:02,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 1698 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:24:02,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8052 states. [2021-11-19 13:24:03,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8052 to 8020. [2021-11-19 13:24:03,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8020 states, 6651 states have (on average 1.5519470756277252) internal successors, (10322), 6691 states have internal predecessors, (10322), 1194 states have call successors, (1194), 164 states have call predecessors, (1194), 174 states have return successors, (1411), 1196 states have call predecessors, (1411), 1190 states have call successors, (1411) [2021-11-19 13:24:03,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8020 states to 8020 states and 12927 transitions. [2021-11-19 13:24:03,540 INFO L78 Accepts]: Start accepts. Automaton has 8020 states and 12927 transitions. Word has length 191 [2021-11-19 13:24:03,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:03,541 INFO L470 AbstractCegarLoop]: Abstraction has 8020 states and 12927 transitions. [2021-11-19 13:24:03,541 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) [2021-11-19 13:24:03,541 INFO L276 IsEmpty]: Start isEmpty. Operand 8020 states and 12927 transitions. [2021-11-19 13:24:03,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-19 13:24:03,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:03,573 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:24:03,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 13:24:03,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:24:03,805 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:24:03,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:03,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1203958411, now seen corresponding path program 1 times [2021-11-19 13:24:03,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:24:03,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322857189] [2021-11-19 13:24:03,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:03,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:24:03,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:24:03,821 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:24:03,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 13:24:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:04,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:24:04,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:24:04,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:24:05,096 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:05,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322857189] [2021-11-19 13:24:05,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322857189] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:24:05,097 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:24:05,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:24:05,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153148020] [2021-11-19 13:24:05,098 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:05,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:24:05,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:05,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:24:05,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:24:05,100 INFO L87 Difference]: Start difference. First operand 8020 states and 12927 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) [2021-11-19 13:24:06,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:06,157 INFO L93 Difference]: Finished difference Result 21322 states and 34848 transitions. [2021-11-19 13:24:06,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:24:06,158 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 192 [2021-11-19 13:24:06,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:06,229 INFO L225 Difference]: With dead ends: 21322 [2021-11-19 13:24:06,229 INFO L226 Difference]: Without dead ends: 13560 [2021-11-19 13:24:06,255 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 [2021-11-19 13:24:06,256 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 157 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1698 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:06,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 1698 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:24:06,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13560 states. [2021-11-19 13:24:07,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13560 to 13528. [2021-11-19 13:24:07,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13528 states, 11487 states have (on average 1.5701227474536432) internal successors, (18036), 11527 states have internal predecessors, (18036), 1866 states have call successors, (1866), 164 states have call predecessors, (1866), 174 states have return successors, (2275), 1868 states have call predecessors, (2275), 1862 states have call successors, (2275) [2021-11-19 13:24:07,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13528 states to 13528 states and 22177 transitions. [2021-11-19 13:24:07,733 INFO L78 Accepts]: Start accepts. Automaton has 13528 states and 22177 transitions. Word has length 192 [2021-11-19 13:24:07,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:07,734 INFO L470 AbstractCegarLoop]: Abstraction has 13528 states and 22177 transitions. [2021-11-19 13:24:07,734 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) [2021-11-19 13:24:07,734 INFO L276 IsEmpty]: Start isEmpty. Operand 13528 states and 22177 transitions. [2021-11-19 13:24:07,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-19 13:24:07,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:07,771 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:24:07,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 13:24:07,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:24:07,985 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:24:07,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:07,986 INFO L85 PathProgramCache]: Analyzing trace with hash 2033392329, now seen corresponding path program 1 times [2021-11-19 13:24:07,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:24:07,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845453792] [2021-11-19 13:24:07,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:07,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:24:07,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:24:07,989 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:24:08,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 13:24:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:08,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:24:08,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:24:08,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:24:09,408 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:09,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845453792] [2021-11-19 13:24:09,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845453792] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:24:09,408 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:24:09,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:24:09,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770350376] [2021-11-19 13:24:09,409 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:09,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:24:09,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:09,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:24:09,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:24:09,410 INFO L87 Difference]: Start difference. First operand 13528 states and 22177 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 13:24:11,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:11,157 INFO L93 Difference]: Finished difference Result 37308 states and 61668 transitions. [2021-11-19 13:24:11,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:24:11,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 207 [2021-11-19 13:24:11,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:11,298 INFO L225 Difference]: With dead ends: 37308 [2021-11-19 13:24:11,299 INFO L226 Difference]: Without dead ends: 24060 [2021-11-19 13:24:11,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:24:11,341 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 155 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:11,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 1704 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:24:11,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24060 states. [2021-11-19 13:24:13,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24060 to 24028. [2021-11-19 13:24:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24028 states, 20451 states have (on average 1.5704855508288103) internal successors, (32118), 20491 states have internal predecessors, (32118), 3402 states have call successors, (3402), 164 states have call predecessors, (3402), 174 states have return successors, (4195), 3404 states have call predecessors, (4195), 3398 states have call successors, (4195) [2021-11-19 13:24:13,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24028 states to 24028 states and 39715 transitions. [2021-11-19 13:24:13,886 INFO L78 Accepts]: Start accepts. Automaton has 24028 states and 39715 transitions. Word has length 207 [2021-11-19 13:24:13,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:13,887 INFO L470 AbstractCegarLoop]: Abstraction has 24028 states and 39715 transitions. [2021-11-19 13:24:13,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 13:24:13,888 INFO L276 IsEmpty]: Start isEmpty. Operand 24028 states and 39715 transitions. [2021-11-19 13:24:13,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-19 13:24:13,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:13,928 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:24:13,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 13:24:14,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:24:14,149 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:24:14,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:14,150 INFO L85 PathProgramCache]: Analyzing trace with hash -110255995, now seen corresponding path program 1 times [2021-11-19 13:24:14,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:24:14,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643797826] [2021-11-19 13:24:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:14,151 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:24:14,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:24:14,152 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:24:14,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 13:24:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:14,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:24:14,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:24:15,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:24:15,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:15,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643797826] [2021-11-19 13:24:15,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [643797826] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:24:15,440 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:24:15,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:24:15,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176843446] [2021-11-19 13:24:15,441 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:15,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:24:15,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:15,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:24:15,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:24:15,443 INFO L87 Difference]: Start difference. First operand 24028 states and 39715 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2021-11-19 13:24:17,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:17,578 INFO L93 Difference]: Finished difference Result 47700 states and 78904 transitions. [2021-11-19 13:24:17,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:24:17,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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 [2021-11-19 13:24:17,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:17,702 INFO L225 Difference]: With dead ends: 47700 [2021-11-19 13:24:17,702 INFO L226 Difference]: Without dead ends: 24060 [2021-11-19 13:24:17,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:24:17,770 INFO L933 BasicCegarLoop]: 1024 mSDtfsCounter, 151 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 2748 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:17,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 2748 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:24:17,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24060 states. [2021-11-19 13:24:19,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24060 to 24028. [2021-11-19 13:24:19,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24028 states, 20451 states have (on average 1.564226688181507) internal successors, (31990), 20491 states have internal predecessors, (31990), 3402 states have call successors, (3402), 164 states have call predecessors, (3402), 174 states have return successors, (4195), 3404 states have call predecessors, (4195), 3398 states have call successors, (4195) [2021-11-19 13:24:20,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24028 states to 24028 states and 39587 transitions. [2021-11-19 13:24:20,016 INFO L78 Accepts]: Start accepts. Automaton has 24028 states and 39587 transitions. Word has length 194 [2021-11-19 13:24:20,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:20,017 INFO L470 AbstractCegarLoop]: Abstraction has 24028 states and 39587 transitions. [2021-11-19 13:24:20,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2021-11-19 13:24:20,018 INFO L276 IsEmpty]: Start isEmpty. Operand 24028 states and 39587 transitions. [2021-11-19 13:24:20,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-19 13:24:20,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:20,054 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:24:20,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 13:24:20,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:24:20,255 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:24:20,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:20,255 INFO L85 PathProgramCache]: Analyzing trace with hash 785447392, now seen corresponding path program 1 times [2021-11-19 13:24:20,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:24:20,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120421332] [2021-11-19 13:24:20,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:20,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:24:20,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:24:20,258 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:24:20,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 13:24:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:20,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:24:20,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:24:21,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:24:21,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:21,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120421332] [2021-11-19 13:24:21,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120421332] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:24:21,417 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:24:21,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:24:21,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496829278] [2021-11-19 13:24:21,417 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:21,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:24:21,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:21,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:24:21,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:24:21,419 INFO L87 Difference]: Start difference. First operand 24028 states and 39587 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2021-11-19 13:24:24,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:24,792 INFO L93 Difference]: Finished difference Result 68532 states and 113489 transitions. [2021-11-19 13:24:24,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:24:24,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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 [2021-11-19 13:24:24,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:24,984 INFO L225 Difference]: With dead ends: 68532 [2021-11-19 13:24:24,984 INFO L226 Difference]: Without dead ends: 44804 [2021-11-19 13:24:25,048 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 [2021-11-19 13:24:25,050 INFO L933 BasicCegarLoop]: 864 mSDtfsCounter, 153 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:25,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 1703 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:24:25,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44804 states. [2021-11-19 13:24:30,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44804 to 44772. [2021-11-19 13:24:30,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44772 states, 38379 states have (on average 1.5707548398863962) internal successors, (60284), 38419 states have internal predecessors, (60284), 6218 states have call successors, (6218), 164 states have call predecessors, (6218), 174 states have return successors, (7523), 6220 states have call predecessors, (7523), 6214 states have call successors, (7523) [2021-11-19 13:24:30,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44772 states to 44772 states and 74025 transitions. [2021-11-19 13:24:30,250 INFO L78 Accepts]: Start accepts. Automaton has 44772 states and 74025 transitions. Word has length 194 [2021-11-19 13:24:30,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:30,251 INFO L470 AbstractCegarLoop]: Abstraction has 44772 states and 74025 transitions. [2021-11-19 13:24:30,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2021-11-19 13:24:30,251 INFO L276 IsEmpty]: Start isEmpty. Operand 44772 states and 74025 transitions. [2021-11-19 13:24:30,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-19 13:24:30,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:30,295 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:24:30,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-19 13:24:30,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:24:30,497 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:24:30,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:30,498 INFO L85 PathProgramCache]: Analyzing trace with hash 272876496, now seen corresponding path program 1 times [2021-11-19 13:24:30,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:24:30,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236666514] [2021-11-19 13:24:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:30,499 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:24:30,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:24:30,501 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:24:30,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ef37d0-251a-4f88-aef6-494cc9e22b42/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 13:24:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:30,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:24:30,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:24:31,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:24:31,652 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:31,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236666514] [2021-11-19 13:24:31,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236666514] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:24:31,652 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:24:31,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:24:31,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907698986] [2021-11-19 13:24:31,653 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:31,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:24:31,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:31,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:24:31,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:24:31,655 INFO L87 Difference]: Start difference. First operand 44772 states and 74025 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 13:24:38,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:38,133 INFO L93 Difference]: Finished difference Result 121228 states and 199299 transitions. [2021-11-19 13:24:38,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:24:38,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 209 [2021-11-19 13:24:38,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:38,598 INFO L225 Difference]: With dead ends: 121228 [2021-11-19 13:24:38,598 INFO L226 Difference]: Without dead ends: 76808 [2021-11-19 13:24:38,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:24:38,700 INFO L933 BasicCegarLoop]: 867 mSDtfsCounter, 151 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:38,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 1679 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:24:38,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76808 states.