./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 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/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_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cf397912a53dab4d44f4df9c274fc7c69b1023a0a0a29a356bc73a744537daa6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:09:43,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:09:43,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:09:43,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:09:43,161 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:09:43,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:09:43,170 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:09:43,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:09:43,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:09:43,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:09:43,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:09:43,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:09:43,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:09:43,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:09:43,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:09:43,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:09:43,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:09:43,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:09:43,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:09:43,213 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:09:43,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:09:43,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:09:43,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:09:43,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:09:43,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:09:43,225 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:09:43,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:09:43,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:09:43,228 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:09:43,229 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:09:43,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:09:43,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:09:43,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:09:43,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:09:43,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:09:43,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:09:43,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:09:43,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:09:43,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:09:43,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:09:43,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:09:43,240 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:09:43,296 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:09:43,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:09:43,300 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:09:43,301 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:09:43,301 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:09:43,301 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:09:43,302 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:09:43,302 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:09:43,302 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:09:43,302 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:09:43,304 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:09:43,304 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:09:43,305 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:09:43,305 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:09:43,305 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:09:43,305 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:09:43,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:09:43,307 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:09:43,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:09:43,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:09:43,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:09:43,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:09:43,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:09:43,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:09:43,309 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:09:43,309 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:09:43,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:09:43,310 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:09:43,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:09:43,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:09:43,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:09:43,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:09:43,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:09:43,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:09:43,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:09:43,314 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:09:43,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:09:43,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:09:43,315 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:09:43,316 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:09:43,316 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_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf397912a53dab4d44f4df9c274fc7c69b1023a0a0a29a356bc73a744537daa6 [2021-11-12 23:09:43,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:09:43,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:09:43,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:09:43,683 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:09:43,684 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:09:43,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/email_spec4_productSimulator.cil.c [2021-11-12 23:09:43,770 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/data/eca382f32/de5642f768d449b2bdec7befc39630bb/FLAG27803baaf [2021-11-12 23:09:44,510 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:09:44,511 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/sv-benchmarks/c/product-lines/email_spec4_productSimulator.cil.c [2021-11-12 23:09:44,544 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/data/eca382f32/de5642f768d449b2bdec7befc39630bb/FLAG27803baaf [2021-11-12 23:09:44,655 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/data/eca382f32/de5642f768d449b2bdec7befc39630bb [2021-11-12 23:09:44,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:09:44,661 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:09:44,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:09:44,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:09:44,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:09:44,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:09:44" (1/1) ... [2021-11-12 23:09:44,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38001c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:44, skipping insertion in model container [2021-11-12 23:09:44,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:09:44" (1/1) ... [2021-11-12 23:09:44,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:09:44,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:09:45,247 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/sv-benchmarks/c/product-lines/email_spec4_productSimulator.cil.c[18883,18896] [2021-11-12 23:09:45,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:09:45,553 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:09:45,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7433e605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:45, skipping insertion in model container [2021-11-12 23:09:45,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:09:45,555 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:09:45,557 INFO L158 Benchmark]: Toolchain (without parser) took 894.25ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 52.1MB in the beginning and 72.8MB in the end (delta: -20.7MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. [2021-11-12 23:09:45,559 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 90.2MB. Free memory was 59.7MB in the beginning and 59.7MB in the end (delta: 27.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:09:45,561 INFO L158 Benchmark]: CACSL2BoogieTranslator took 887.87ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 51.8MB in the beginning and 72.8MB in the end (delta: -21.0MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. [2021-11-12 23:09:45,564 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 90.2MB. Free memory was 59.7MB in the beginning and 59.7MB in the end (delta: 27.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 887.87ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 51.8MB in the beginning and 72.8MB in the end (delta: -21.0MB). Peak memory consumption was 6.6MB. 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_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/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_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cf397912a53dab4d44f4df9c274fc7c69b1023a0a0a29a356bc73a744537daa6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:09:48,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:09:48,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:09:48,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:09:48,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:09:48,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:09:48,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:09:48,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:09:48,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:09:48,261 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:09:48,262 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:09:48,264 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:09:48,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:09:48,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:09:48,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:09:48,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:09:48,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:09:48,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:09:48,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:09:48,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:09:48,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:09:48,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:09:48,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:09:48,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:09:48,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:09:48,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:09:48,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:09:48,308 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:09:48,309 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:09:48,310 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:09:48,310 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:09:48,311 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:09:48,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:09:48,314 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:09:48,315 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:09:48,316 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:09:48,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:09:48,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:09:48,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:09:48,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:09:48,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:09:48,322 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:09:48,353 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:09:48,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:09:48,354 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:09:48,355 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:09:48,355 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:09:48,355 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:09:48,356 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:09:48,356 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:09:48,356 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:09:48,356 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:09:48,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:09:48,358 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:09:48,358 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:09:48,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:09:48,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:09:48,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:09:48,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:09:48,359 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:09:48,360 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:09:48,360 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:09:48,360 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:09:48,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:09:48,361 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:09:48,361 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:09:48,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:09:48,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:09:48,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:09:48,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:09:48,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:09:48,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:09:48,363 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:09:48,363 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:09:48,363 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:09:48,364 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:09:48,364 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:09:48,364 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:09:48,364 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_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf397912a53dab4d44f4df9c274fc7c69b1023a0a0a29a356bc73a744537daa6 [2021-11-12 23:09:48,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:09:48,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:09:48,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:09:48,792 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:09:48,793 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:09:48,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/email_spec4_productSimulator.cil.c [2021-11-12 23:09:48,862 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/data/6f2e32ccb/f6a128d7d3fa4939a32acf4760cb10f8/FLAG20f56c961 [2021-11-12 23:09:49,726 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:09:49,727 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/sv-benchmarks/c/product-lines/email_spec4_productSimulator.cil.c [2021-11-12 23:09:49,757 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/data/6f2e32ccb/f6a128d7d3fa4939a32acf4760cb10f8/FLAG20f56c961 [2021-11-12 23:09:49,801 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/data/6f2e32ccb/f6a128d7d3fa4939a32acf4760cb10f8 [2021-11-12 23:09:49,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:09:49,805 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:09:49,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:09:49,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:09:49,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:09:49,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:09:49" (1/1) ... [2021-11-12 23:09:49,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2605ce0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:49, skipping insertion in model container [2021-11-12 23:09:49,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:09:49" (1/1) ... [2021-11-12 23:09:49,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:09:49,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:09:50,391 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/sv-benchmarks/c/product-lines/email_spec4_productSimulator.cil.c[18883,18896] [2021-11-12 23:09:50,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:09:50,708 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:09:50,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:09:50,773 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/sv-benchmarks/c/product-lines/email_spec4_productSimulator.cil.c[18883,18896] [2021-11-12 23:09:50,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:09:50,907 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:09:50,932 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/sv-benchmarks/c/product-lines/email_spec4_productSimulator.cil.c[18883,18896] [2021-11-12 23:09:50,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:09:51,020 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:09:51,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:51 WrapperNode [2021-11-12 23:09:51,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:09:51,022 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:09:51,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:09:51,023 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:09:51,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:51" (1/1) ... [2021-11-12 23:09:51,099 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:51" (1/1) ... [2021-11-12 23:09:51,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:09:51,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:09:51,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:09:51,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:09:51,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:51" (1/1) ... [2021-11-12 23:09:51,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:51" (1/1) ... [2021-11-12 23:09:51,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:51" (1/1) ... [2021-11-12 23:09:51,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:51" (1/1) ... [2021-11-12 23:09:51,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:51" (1/1) ... [2021-11-12 23:09:51,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:51" (1/1) ... [2021-11-12 23:09:51,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:51" (1/1) ... [2021-11-12 23:09:51,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:09:51,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:09:51,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:09:51,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:09:51,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:51" (1/1) ... [2021-11-12 23:09:51,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:09:51,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:09:51,417 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:09:51,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:09:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2021-11-12 23:09:51,480 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2021-11-12 23:09:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure setup_chuck__before__Keys [2021-11-12 23:09:51,481 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_chuck__before__Keys [2021-11-12 23:09:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Sign [2021-11-12 23:09:51,481 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Sign [2021-11-12 23:09:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookSize [2021-11-12 23:09:51,482 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookSize [2021-11-12 23:09:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2021-11-12 23:09:51,482 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2021-11-12 23:09:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookAddress [2021-11-12 23:09:51,483 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookAddress [2021-11-12 23:09:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2021-11-12 23:09:51,483 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2021-11-12 23:09:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Verify [2021-11-12 23:09:51,483 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Verify [2021-11-12 23:09:51,484 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-11-12 23:09:51,484 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-11-12 23:09:51,484 INFO L130 BoogieDeclarations]: Found specification of procedure setup_bob__before__Keys [2021-11-12 23:09:51,484 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_bob__before__Keys [2021-11-12 23:09:51,484 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-11-12 23:09:51,485 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-11-12 23:09:51,485 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-11-12 23:09:51,485 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-11-12 23:09:51,485 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2021-11-12 23:09:51,485 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2021-11-12 23:09:51,486 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Decrypt [2021-11-12 23:09:51,486 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Decrypt [2021-11-12 23:09:51,486 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Encrypt [2021-11-12 23:09:51,486 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Encrypt [2021-11-12 23:09:51,487 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2021-11-12 23:09:51,487 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2021-11-12 23:09:51,488 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2021-11-12 23:09:51,488 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2021-11-12 23:09:51,488 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2021-11-12 23:09:51,488 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2021-11-12 23:09:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-12 23:09:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Forward [2021-11-12 23:09:51,489 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Forward [2021-11-12 23:09:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2021-11-12 23:09:51,490 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2021-11-12 23:09:51,490 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2021-11-12 23:09:51,490 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2021-11-12 23:09:51,490 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-11-12 23:09:51,490 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-11-12 23:09:51,491 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable__before__Encrypt [2021-11-12 23:09:51,491 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable__before__Encrypt [2021-11-12 23:09:51,491 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2021-11-12 23:09:51,492 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2021-11-12 23:09:51,493 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2021-11-12 23:09:51,494 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2021-11-12 23:09:51,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:09:51,496 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__AddressBook [2021-11-12 23:09:51,496 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__AddressBook [2021-11-12 23:09:51,496 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Encrypt [2021-11-12 23:09:51,496 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Encrypt [2021-11-12 23:09:51,497 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__AutoResponder [2021-11-12 23:09:51,497 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__AutoResponder [2021-11-12 23:09:51,497 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookSize [2021-11-12 23:09:51,497 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookSize [2021-11-12 23:09:51,498 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2021-11-12 23:09:51,498 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2021-11-12 23:09:51,498 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2021-11-12 23:09:51,498 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2021-11-12 23:09:51,498 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-11-12 23:09:51,499 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-11-12 23:09:51,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:09:51,499 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2021-11-12 23:09:51,499 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2021-11-12 23:09:51,500 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-11-12 23:09:51,500 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-11-12 23:09:51,501 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2021-11-12 23:09:51,501 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2021-11-12 23:09:51,501 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rjh__before__Keys [2021-11-12 23:09:51,502 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rjh__before__Keys [2021-11-12 23:09:51,502 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Verify [2021-11-12 23:09:51,502 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Verify [2021-11-12 23:09:51,502 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2021-11-12 23:09:51,502 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2021-11-12 23:09:51,503 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-11-12 23:09:51,503 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-11-12 23:09:51,503 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2021-11-12 23:09:51,503 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2021-11-12 23:09:51,503 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Sign [2021-11-12 23:09:51,504 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Sign [2021-11-12 23:09:51,504 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2021-11-12 23:09:51,505 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2021-11-12 23:09:51,505 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookAddress [2021-11-12 23:09:51,505 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookAddress [2021-11-12 23:09:51,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:09:51,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:09:55,794 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:09:55,794 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:09:55,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:09:55 BoogieIcfgContainer [2021-11-12 23:09:55,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:09:55,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:09:55,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:09:55,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:09:55,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:09:49" (1/3) ... [2021-11-12 23:09:55,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d3184c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:09:55, skipping insertion in model container [2021-11-12 23:09:55,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:51" (2/3) ... [2021-11-12 23:09:55,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d3184c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:09:55, skipping insertion in model container [2021-11-12 23:09:55,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:09:55" (3/3) ... [2021-11-12 23:09:55,809 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec4_productSimulator.cil.c [2021-11-12 23:09:55,815 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:09:55,815 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:09:55,880 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:09:55,889 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:09:55,889 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:09:55,931 INFO L276 IsEmpty]: Start isEmpty. Operand has 603 states, 448 states have (on average 1.515625) internal successors, (679), 468 states have internal predecessors, (679), 110 states have call successors, (110), 43 states have call predecessors, (110), 43 states have return successors, (110), 109 states have call predecessors, (110), 110 states have call successors, (110) [2021-11-12 23:09:55,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-12 23:09:55,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:55,989 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:55,990 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:56,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:56,001 INFO L85 PathProgramCache]: Analyzing trace with hash -567184417, now seen corresponding path program 1 times [2021-11-12 23:09:56,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:56,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045093053] [2021-11-12 23:09:56,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:56,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:56,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:56,039 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:56,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:09:56,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:56,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:09:56,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 23:09:57,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 23:09:57,547 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:57,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045093053] [2021-11-12 23:09:57,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045093053] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:57,548 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:57,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:09:57,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118973807] [2021-11-12 23:09:57,553 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:57,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:09:57,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:57,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:09:57,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:09:57,601 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) [2021-11-12 23:09:57,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:57,723 INFO L93 Difference]: Finished difference Result 937 states and 1377 transitions. [2021-11-12 23:09:57,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:09:57,725 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 [2021-11-12 23:09:57,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:57,757 INFO L225 Difference]: With dead ends: 937 [2021-11-12 23:09:57,758 INFO L226 Difference]: Without dead ends: 596 [2021-11-12 23:09:57,769 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 [2021-11-12 23:09:57,773 INFO L933 BasicCegarLoop]: 895 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.08ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:57,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 14.08ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:09:57,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-11-12 23:09:57,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2021-11-12 23:09:57,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 442 states have (on average 1.51131221719457) internal successors, (668), 461 states have internal predecessors, (668), 110 states have call successors, (110), 43 states have call predecessors, (110), 43 states have return successors, (109), 108 states have call predecessors, (109), 109 states have call successors, (109) [2021-11-12 23:09:57,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 887 transitions. [2021-11-12 23:09:57,911 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 887 transitions. Word has length 133 [2021-11-12 23:09:57,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:57,913 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 887 transitions. [2021-11-12 23:09:57,913 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) [2021-11-12 23:09:57,913 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 887 transitions. [2021-11-12 23:09:57,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-12 23:09:57,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:57,921 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] [2021-11-12 23:09:57,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:58,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:58,137 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:58,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:58,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1887142888, now seen corresponding path program 1 times [2021-11-12 23:09:58,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:58,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471851338] [2021-11-12 23:09:58,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:58,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:58,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:58,142 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:58,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:09:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:58,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:09:58,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 23:09:59,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 23:09:59,521 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:59,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471851338] [2021-11-12 23:09:59,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471851338] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:59,524 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:59,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-12 23:09:59,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99557968] [2021-11-12 23:09:59,531 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:59,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:09:59,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:59,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:09:59,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:09:59,538 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) [2021-11-12 23:09:59,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:59,678 INFO L93 Difference]: Finished difference Result 1156 states and 1718 transitions. [2021-11-12 23:09:59,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:09:59,679 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 [2021-11-12 23:09:59,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:59,688 INFO L225 Difference]: With dead ends: 1156 [2021-11-12 23:09:59,688 INFO L226 Difference]: Without dead ends: 596 [2021-11-12 23:09:59,691 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 [2021-11-12 23:09:59,692 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 3 mSDsluCounter, 2644 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3529 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.64ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:59,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 3529 Invalid, 18 Unknown, 0 Unchecked, 26.64ms Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 21.08ms Time] [2021-11-12 23:09:59,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-11-12 23:09:59,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2021-11-12 23:09:59,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 442 states have (on average 1.495475113122172) internal successors, (661), 461 states have internal predecessors, (661), 110 states have call successors, (110), 43 states have call predecessors, (110), 43 states have return successors, (109), 108 states have call predecessors, (109), 109 states have call successors, (109) [2021-11-12 23:09:59,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 880 transitions. [2021-11-12 23:09:59,737 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 880 transitions. Word has length 134 [2021-11-12 23:09:59,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:59,738 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 880 transitions. [2021-11-12 23:09:59,738 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) [2021-11-12 23:09:59,739 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 880 transitions. [2021-11-12 23:09:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 23:09:59,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:59,750 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] [2021-11-12 23:09:59,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 23:09:59,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:59,967 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:59,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:59,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1817414579, now seen corresponding path program 1 times [2021-11-12 23:09:59,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:59,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887680628] [2021-11-12 23:09:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:59,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:59,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:59,970 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:00,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:10:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:00,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:10:00,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-12 23:10:00,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 23:10:01,159 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:01,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887680628] [2021-11-12 23:10:01,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887680628] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:01,162 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:01,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:10:01,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665445880] [2021-11-12 23:10:01,163 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:01,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:10:01,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:01,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:10:01,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:10:01,165 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) [2021-11-12 23:10:03,206 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:05,213 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:05,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:05,304 INFO L93 Difference]: Finished difference Result 1162 states and 1731 transitions. [2021-11-12 23:10:05,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:10:05,305 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 [2021-11-12 23:10:05,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:05,310 INFO L225 Difference]: With dead ends: 1162 [2021-11-12 23:10:05,310 INFO L226 Difference]: Without dead ends: 597 [2021-11-12 23:10:05,313 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 [2021-11-12 23:10:05,314 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 841 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4051.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.13ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4078.50ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:05,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 905 Invalid, 13 Unknown, 0 Unchecked, 6.13ms Time], IncrementalHoareTripleChecker [6 Valid, 5 Invalid, 2 Unknown, 0 Unchecked, 4078.50ms Time] [2021-11-12 23:10:05,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-11-12 23:10:05,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 597. [2021-11-12 23:10:05,359 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) [2021-11-12 23:10:05,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 874 transitions. [2021-11-12 23:10:05,367 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 874 transitions. Word has length 139 [2021-11-12 23:10:05,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:05,367 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 874 transitions. [2021-11-12 23:10:05,368 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) [2021-11-12 23:10:05,368 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 874 transitions. [2021-11-12 23:10:05,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-12 23:10:05,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:05,373 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] [2021-11-12 23:10:05,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:05,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:05,590 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:05,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:05,591 INFO L85 PathProgramCache]: Analyzing trace with hash -633923939, now seen corresponding path program 1 times [2021-11-12 23:10:05,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:05,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537211181] [2021-11-12 23:10:05,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:05,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:05,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:05,593 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:05,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:10:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:06,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:10:06,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-12 23:10:06,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-12 23:10:06,788 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:06,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537211181] [2021-11-12 23:10:06,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537211181] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:06,791 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:06,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:10:06,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404035160] [2021-11-12 23:10:06,794 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:06,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:10:06,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:06,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:10:06,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:10:06,801 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) [2021-11-12 23:10:08,841 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:08,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:08,937 INFO L93 Difference]: Finished difference Result 1156 states and 1710 transitions. [2021-11-12 23:10:08,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:10:08,950 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 [2021-11-12 23:10:08,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:08,955 INFO L225 Difference]: With dead ends: 1156 [2021-11-12 23:10:08,955 INFO L226 Difference]: Without dead ends: 595 [2021-11-12 23:10:08,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:10:08,958 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 824 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2044.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.93ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2069.11ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:08,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 900 Invalid, 7 Unknown, 0 Unchecked, 4.93ms Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 1 Unknown, 0 Unchecked, 2069.11ms Time] [2021-11-12 23:10:08,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-12 23:10:09,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2021-11-12 23:10:09,004 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) [2021-11-12 23:10:09,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 867 transitions. [2021-11-12 23:10:09,010 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 867 transitions. Word has length 149 [2021-11-12 23:10:09,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:09,011 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 867 transitions. [2021-11-12 23:10:09,011 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) [2021-11-12 23:10:09,011 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 867 transitions. [2021-11-12 23:10:09,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-12 23:10:09,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:09,016 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] [2021-11-12 23:10:09,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:09,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:09,217 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:09,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:09,217 INFO L85 PathProgramCache]: Analyzing trace with hash 982930644, now seen corresponding path program 1 times [2021-11-12 23:10:09,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:09,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709552377] [2021-11-12 23:10:09,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:09,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:09,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:09,220 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:09,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:10:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:09,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:10:09,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-12 23:10:09,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-12 23:10:10,284 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:10,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709552377] [2021-11-12 23:10:10,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709552377] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:10,284 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:10,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:10:10,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141582050] [2021-11-12 23:10:10,284 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:10,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:10:10,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:10,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:10:10,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:10:10,286 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) [2021-11-12 23:10:12,320 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:12,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:12,465 INFO L93 Difference]: Finished difference Result 1147 states and 1676 transitions. [2021-11-12 23:10:12,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:10:12,465 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 [2021-11-12 23:10:12,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:12,472 INFO L225 Difference]: With dead ends: 1147 [2021-11-12 23:10:12,473 INFO L226 Difference]: Without dead ends: 598 [2021-11-12 23:10:12,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:10:12,476 INFO L933 BasicCegarLoop]: 842 mSDtfsCounter, 804 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2080.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.78ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2099.97ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:12,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 883 Invalid, 25 Unknown, 0 Unchecked, 6.78ms Time], IncrementalHoareTripleChecker [11 Valid, 13 Invalid, 1 Unknown, 0 Unchecked, 2099.97ms Time] [2021-11-12 23:10:12,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-12 23:10:12,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 592. [2021-11-12 23:10:12,520 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) [2021-11-12 23:10:12,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 850 transitions. [2021-11-12 23:10:12,526 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 850 transitions. Word has length 150 [2021-11-12 23:10:12,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:12,527 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 850 transitions. [2021-11-12 23:10:12,527 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) [2021-11-12 23:10:12,527 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 850 transitions. [2021-11-12 23:10:12,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-12 23:10:12,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:12,533 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] [2021-11-12 23:10:12,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:12,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:12,746 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:12,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:12,747 INFO L85 PathProgramCache]: Analyzing trace with hash 45386734, now seen corresponding path program 1 times [2021-11-12 23:10:12,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:12,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129472222] [2021-11-12 23:10:12,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:12,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:12,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:12,749 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:12,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:10:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:13,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:10:13,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-12 23:10:13,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-12 23:10:14,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:14,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129472222] [2021-11-12 23:10:14,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129472222] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:10:14,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:10:14,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2021-11-12 23:10:14,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332305201] [2021-11-12 23:10:14,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:14,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:10:14,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:14,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:10:14,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:10:14,164 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) [2021-11-12 23:10:14,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:14,457 INFO L93 Difference]: Finished difference Result 1131 states and 1637 transitions. [2021-11-12 23:10:14,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:10:14,458 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 [2021-11-12 23:10:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:14,465 INFO L225 Difference]: With dead ends: 1131 [2021-11-12 23:10:14,465 INFO L226 Difference]: Without dead ends: 594 [2021-11-12 23:10:14,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:10:14,473 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 363 mSDsluCounter, 4613 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 139.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 5450 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.25ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 168.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:14,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 5450 Invalid, 119 Unknown, 0 Unchecked, 16.25ms Time], IncrementalHoareTripleChecker [44 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 168.58ms Time] [2021-11-12 23:10:14,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-12 23:10:14,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 594. [2021-11-12 23:10:14,513 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) [2021-11-12 23:10:14,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 853 transitions. [2021-11-12 23:10:14,519 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 853 transitions. Word has length 168 [2021-11-12 23:10:14,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:14,520 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 853 transitions. [2021-11-12 23:10:14,521 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) [2021-11-12 23:10:14,521 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 853 transitions. [2021-11-12 23:10:14,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-12 23:10:14,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:14,525 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] [2021-11-12 23:10:14,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:14,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:14,738 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:14,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:14,739 INFO L85 PathProgramCache]: Analyzing trace with hash -677250082, now seen corresponding path program 1 times [2021-11-12 23:10:14,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:14,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228288974] [2021-11-12 23:10:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:14,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:14,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:14,741 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:14,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:10:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:15,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:10:15,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:15,536 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-12 23:10:15,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-12 23:10:15,959 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:15,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228288974] [2021-11-12 23:10:15,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228288974] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:10:15,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:10:15,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-12 23:10:15,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052585844] [2021-11-12 23:10:15,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:15,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:10:15,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:15,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:10:15,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:10:15,961 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) [2021-11-12 23:10:16,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:16,205 INFO L93 Difference]: Finished difference Result 1132 states and 1640 transitions. [2021-11-12 23:10:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:10:16,206 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 [2021-11-12 23:10:16,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:16,211 INFO L225 Difference]: With dead ends: 1132 [2021-11-12 23:10:16,211 INFO L226 Difference]: Without dead ends: 596 [2021-11-12 23:10:16,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:10:16,214 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 361 mSDsluCounter, 2940 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 126.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 3776 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.42ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 152.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:16,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 3776 Invalid, 103 Unknown, 0 Unchecked, 10.42ms Time], IncrementalHoareTripleChecker [47 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 152.73ms Time] [2021-11-12 23:10:16,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-11-12 23:10:16,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2021-11-12 23:10:16,278 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) [2021-11-12 23:10:16,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 858 transitions. [2021-11-12 23:10:16,283 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 858 transitions. Word has length 169 [2021-11-12 23:10:16,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:16,285 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 858 transitions. [2021-11-12 23:10:16,285 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) [2021-11-12 23:10:16,285 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 858 transitions. [2021-11-12 23:10:16,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-12 23:10:16,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:16,289 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] [2021-11-12 23:10:16,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:16,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:16,510 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:16,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:16,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1959391511, now seen corresponding path program 1 times [2021-11-12 23:10:16,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:16,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557433881] [2021-11-12 23:10:16,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:16,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:16,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:16,513 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:16,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:10:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:16,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:10:16,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 23:10:17,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-12 23:10:17,807 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:17,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557433881] [2021-11-12 23:10:17,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557433881] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:17,808 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:17,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 23:10:17,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407618835] [2021-11-12 23:10:17,808 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:17,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:10:17,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:17,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:10:17,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:10:17,812 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) [2021-11-12 23:10:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:18,122 INFO L93 Difference]: Finished difference Result 1120 states and 1626 transitions. [2021-11-12 23:10:18,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:10:18,123 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 [2021-11-12 23:10:18,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:18,129 INFO L225 Difference]: With dead ends: 1120 [2021-11-12 23:10:18,129 INFO L226 Difference]: Without dead ends: 596 [2021-11-12 23:10:18,131 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 [2021-11-12 23:10:18,132 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 538 mSDsluCounter, 5267 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 133.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 6104 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.95ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 159.75ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:18,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 6104 Invalid, 144 Unknown, 0 Unchecked, 20.95ms Time], IncrementalHoareTripleChecker [60 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 159.75ms Time] [2021-11-12 23:10:18,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-11-12 23:10:18,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2021-11-12 23:10:18,165 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) [2021-11-12 23:10:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 857 transitions. [2021-11-12 23:10:18,170 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 857 transitions. Word has length 170 [2021-11-12 23:10:18,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:18,171 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 857 transitions. [2021-11-12 23:10:18,171 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) [2021-11-12 23:10:18,171 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 857 transitions. [2021-11-12 23:10:18,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-12 23:10:18,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:18,175 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] [2021-11-12 23:10:18,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:18,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:18,394 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:18,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:18,394 INFO L85 PathProgramCache]: Analyzing trace with hash 649688403, now seen corresponding path program 2 times [2021-11-12 23:10:18,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:18,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578915342] [2021-11-12 23:10:18,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:10:18,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:18,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:18,396 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:18,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:10:18,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-12 23:10:18,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:10:18,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:10:18,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:10:19,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:10:19,632 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:19,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578915342] [2021-11-12 23:10:19,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578915342] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:19,633 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:19,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-11-12 23:10:19,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751691008] [2021-11-12 23:10:19,634 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:19,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:10:19,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:19,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:10:19,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:10:19,635 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) [2021-11-12 23:10:21,663 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:23,670 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:25,675 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:28,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:28,879 INFO L93 Difference]: Finished difference Result 1899 states and 2806 transitions. [2021-11-12 23:10:28,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:10:28,880 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 [2021-11-12 23:10:28,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:28,896 INFO L225 Difference]: With dead ends: 1899 [2021-11-12 23:10:28,896 INFO L226 Difference]: Without dead ends: 1895 [2021-11-12 23:10:28,898 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 [2021-11-12 23:10:28,900 INFO L933 BasicCegarLoop]: 1274 mSDtfsCounter, 1851 mSDsluCounter, 10602 mSDsCounter, 0 mSdLazyCounter, 1530 mSolverCounterSat, 95 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8327.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1889 SdHoareTripleChecker+Valid, 11876 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 50.88ms SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1530 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8669.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:28,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1889 Valid, 11876 Invalid, 1628 Unknown, 0 Unchecked, 50.88ms Time], IncrementalHoareTripleChecker [95 Valid, 1530 Invalid, 3 Unknown, 0 Unchecked, 8669.32ms Time] [2021-11-12 23:10:28,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-11-12 23:10:29,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1342. [2021-11-12 23:10:29,017 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) [2021-11-12 23:10:29,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1981 transitions. [2021-11-12 23:10:29,030 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1981 transitions. Word has length 171 [2021-11-12 23:10:29,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:29,032 INFO L470 AbstractCegarLoop]: Abstraction has 1342 states and 1981 transitions. [2021-11-12 23:10:29,032 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) [2021-11-12 23:10:29,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1981 transitions. [2021-11-12 23:10:29,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-12 23:10:29,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:29,040 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] [2021-11-12 23:10:29,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:29,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:29,256 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:29,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:29,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1911013992, now seen corresponding path program 1 times [2021-11-12 23:10:29,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:29,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643582285] [2021-11-12 23:10:29,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:29,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:29,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:29,259 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:29,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:10:29,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:29,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:10:29,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 23:10:30,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-12 23:10:30,836 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:30,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643582285] [2021-11-12 23:10:30,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643582285] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:30,836 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:30,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 23:10:30,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519558331] [2021-11-12 23:10:30,836 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:30,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:10:30,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:30,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:10:30,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:10:30,839 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) [2021-11-12 23:10:31,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:31,229 INFO L93 Difference]: Finished difference Result 2595 states and 3855 transitions. [2021-11-12 23:10:31,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:10:31,230 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 [2021-11-12 23:10:31,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:31,243 INFO L225 Difference]: With dead ends: 2595 [2021-11-12 23:10:31,243 INFO L226 Difference]: Without dead ends: 1346 [2021-11-12 23:10:31,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:10:31,249 INFO L933 BasicCegarLoop]: 838 mSDtfsCounter, 361 mSDsluCounter, 5086 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 164.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 5924 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.31ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 198.51ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:31,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 5924 Invalid, 133 Unknown, 0 Unchecked, 11.31ms Time], IncrementalHoareTripleChecker [40 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 198.51ms Time] [2021-11-12 23:10:31,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2021-11-12 23:10:31,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1346. [2021-11-12 23:10:31,362 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) [2021-11-12 23:10:31,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 1986 transitions. [2021-11-12 23:10:31,375 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 1986 transitions. Word has length 172 [2021-11-12 23:10:31,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:31,376 INFO L470 AbstractCegarLoop]: Abstraction has 1346 states and 1986 transitions. [2021-11-12 23:10:31,376 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) [2021-11-12 23:10:31,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 1986 transitions. [2021-11-12 23:10:31,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-12 23:10:31,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:31,384 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] [2021-11-12 23:10:31,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:31,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:31,605 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:31,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:31,605 INFO L85 PathProgramCache]: Analyzing trace with hash -944831863, now seen corresponding path program 1 times [2021-11-12 23:10:31,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:31,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738452984] [2021-11-12 23:10:31,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:31,607 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:31,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:31,608 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:31,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:10:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:32,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:10:32,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 23:10:32,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-12 23:10:32,918 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:32,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738452984] [2021-11-12 23:10:32,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738452984] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:32,919 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:32,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-12 23:10:32,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122936308] [2021-11-12 23:10:32,919 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:32,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:10:32,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:32,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:10:32,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:10:32,921 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) [2021-11-12 23:10:33,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:33,238 INFO L93 Difference]: Finished difference Result 2599 states and 3860 transitions. [2021-11-12 23:10:33,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:10:33,239 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 [2021-11-12 23:10:33,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:33,250 INFO L225 Difference]: With dead ends: 2599 [2021-11-12 23:10:33,250 INFO L226 Difference]: Without dead ends: 1350 [2021-11-12 23:10:33,255 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 [2021-11-12 23:10:33,256 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 357 mSDsluCounter, 4623 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 127.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 5460 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.28ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 150.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:33,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 5460 Invalid, 117 Unknown, 0 Unchecked, 10.28ms Time], IncrementalHoareTripleChecker [44 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 150.87ms Time] [2021-11-12 23:10:33,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-11-12 23:10:33,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1346. [2021-11-12 23:10:33,347 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) [2021-11-12 23:10:33,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 1986 transitions. [2021-11-12 23:10:33,356 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 1986 transitions. Word has length 173 [2021-11-12 23:10:33,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:33,356 INFO L470 AbstractCegarLoop]: Abstraction has 1346 states and 1986 transitions. [2021-11-12 23:10:33,357 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) [2021-11-12 23:10:33,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 1986 transitions. [2021-11-12 23:10:33,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-12 23:10:33,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:33,364 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] [2021-11-12 23:10:33,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:33,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:33,589 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:33,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:33,589 INFO L85 PathProgramCache]: Analyzing trace with hash 966210695, now seen corresponding path program 1 times [2021-11-12 23:10:33,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:33,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887169033] [2021-11-12 23:10:33,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:33,591 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:33,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:33,592 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:33,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:10:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:34,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:10:34,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-12 23:10:34,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-12 23:10:34,928 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:34,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887169033] [2021-11-12 23:10:34,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887169033] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:34,929 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:34,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-12 23:10:34,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601843017] [2021-11-12 23:10:34,929 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:34,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:10:34,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:34,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:10:34,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:10:34,931 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) [2021-11-12 23:10:35,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:35,217 INFO L93 Difference]: Finished difference Result 2196 states and 3206 transitions. [2021-11-12 23:10:35,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:10:35,218 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 [2021-11-12 23:10:35,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:35,234 INFO L225 Difference]: With dead ends: 2196 [2021-11-12 23:10:35,234 INFO L226 Difference]: Without dead ends: 1151 [2021-11-12 23:10:35,239 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 [2021-11-12 23:10:35,240 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 355 mSDsluCounter, 5066 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 142.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 5902 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.66ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 173.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:35,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 5902 Invalid, 128 Unknown, 0 Unchecked, 9.66ms Time], IncrementalHoareTripleChecker [41 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 173.10ms Time] [2021-11-12 23:10:35,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-11-12 23:10:35,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1151. [2021-11-12 23:10:35,356 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) [2021-11-12 23:10:35,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1667 transitions. [2021-11-12 23:10:35,367 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1667 transitions. Word has length 173 [2021-11-12 23:10:35,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:35,368 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 1667 transitions. [2021-11-12 23:10:35,368 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) [2021-11-12 23:10:35,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1667 transitions. [2021-11-12 23:10:35,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-12 23:10:35,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:35,375 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] [2021-11-12 23:10:35,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:35,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:35,594 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:35,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:35,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1993361392, now seen corresponding path program 2 times [2021-11-12 23:10:35,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:35,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655697670] [2021-11-12 23:10:35,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:10:35,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:35,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:35,597 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:35,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:10:35,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-12 23:10:35,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:10:35,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:10:35,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:36,390 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:10:36,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:37,007 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:10:37,007 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:37,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655697670] [2021-11-12 23:10:37,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655697670] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:37,008 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:37,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-11-12 23:10:37,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581637489] [2021-11-12 23:10:37,009 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:37,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:10:37,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:37,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:10:37,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:10:37,010 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) [2021-11-12 23:10:39,057 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:41,063 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:43,068 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:45,073 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:10:47,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:47,885 INFO L93 Difference]: Finished difference Result 3768 states and 5606 transitions. [2021-11-12 23:10:47,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:10:47,886 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 [2021-11-12 23:10:47,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:47,914 INFO L225 Difference]: With dead ends: 3768 [2021-11-12 23:10:47,914 INFO L226 Difference]: Without dead ends: 3762 [2021-11-12 23:10:47,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:10:47,917 INFO L933 BasicCegarLoop]: 2001 mSDtfsCounter, 1783 mSDsluCounter, 15420 mSDsCounter, 0 mSdLazyCounter, 1758 mSolverCounterSat, 169 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10099.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1816 SdHoareTripleChecker+Valid, 17421 SdHoareTripleChecker+Invalid, 1931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.87ms SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1758 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10416.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:47,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1816 Valid, 17421 Invalid, 1931 Unknown, 0 Unchecked, 34.87ms Time], IncrementalHoareTripleChecker [169 Valid, 1758 Invalid, 4 Unknown, 0 Unchecked, 10416.35ms Time] [2021-11-12 23:10:47,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3762 states. [2021-11-12 23:10:48,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3762 to 2654. [2021-11-12 23:10:48,157 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) [2021-11-12 23:10:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3940 transitions. [2021-11-12 23:10:48,168 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3940 transitions. Word has length 174 [2021-11-12 23:10:48,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:48,169 INFO L470 AbstractCegarLoop]: Abstraction has 2654 states and 3940 transitions. [2021-11-12 23:10:48,169 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) [2021-11-12 23:10:48,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3940 transitions. [2021-11-12 23:10:48,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-12 23:10:48,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:48,180 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] [2021-11-12 23:10:48,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:48,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:48,393 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:48,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:48,394 INFO L85 PathProgramCache]: Analyzing trace with hash 11639348, now seen corresponding path program 1 times [2021-11-12 23:10:48,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:48,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531687442] [2021-11-12 23:10:48,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:48,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:48,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:48,395 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:48,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:10:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:48,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:10:48,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 23:10:49,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-12 23:10:49,432 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:49,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531687442] [2021-11-12 23:10:49,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531687442] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:10:49,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:10:49,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-11-12 23:10:49,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396720726] [2021-11-12 23:10:49,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:49,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:10:49,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:49,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:10:49,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:10:49,435 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) [2021-11-12 23:10:49,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:49,738 INFO L93 Difference]: Finished difference Result 3920 states and 5825 transitions. [2021-11-12 23:10:49,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:10:49,739 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 [2021-11-12 23:10:49,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:49,758 INFO L225 Difference]: With dead ends: 3920 [2021-11-12 23:10:49,758 INFO L226 Difference]: Without dead ends: 2601 [2021-11-12 23:10:49,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:10:49,764 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 369 mSDsluCounter, 2934 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 3771 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.27ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 128.42ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:49,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 3771 Invalid, 100 Unknown, 0 Unchecked, 5.27ms Time], IncrementalHoareTripleChecker [47 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 128.42ms Time] [2021-11-12 23:10:49,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-11-12 23:10:49,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2597. [2021-11-12 23:10:49,976 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) [2021-11-12 23:10:49,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 3867 transitions. [2021-11-12 23:10:49,994 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 3867 transitions. Word has length 174 [2021-11-12 23:10:49,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:49,994 INFO L470 AbstractCegarLoop]: Abstraction has 2597 states and 3867 transitions. [2021-11-12 23:10:49,995 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) [2021-11-12 23:10:49,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 3867 transitions. [2021-11-12 23:10:50,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-12 23:10:50,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:50,004 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] [2021-11-12 23:10:50,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:50,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:50,218 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:50,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:50,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2126662409, now seen corresponding path program 1 times [2021-11-12 23:10:50,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:50,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [634654805] [2021-11-12 23:10:50,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:50,220 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:50,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:50,221 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:50,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:10:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:50,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:10:50,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:50,875 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-12 23:10:50,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-12 23:10:51,254 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:51,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [634654805] [2021-11-12 23:10:51,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [634654805] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:51,260 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:51,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-12 23:10:51,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446916394] [2021-11-12 23:10:51,260 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:51,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:10:51,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:51,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:10:51,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:10:51,262 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) [2021-11-12 23:10:51,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:51,513 INFO L93 Difference]: Finished difference Result 4305 states and 6321 transitions. [2021-11-12 23:10:51,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:10:51,514 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 [2021-11-12 23:10:51,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:51,531 INFO L225 Difference]: With dead ends: 4305 [2021-11-12 23:10:51,531 INFO L226 Difference]: Without dead ends: 2202 [2021-11-12 23:10:51,538 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 [2021-11-12 23:10:51,539 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 706 mSDsluCounter, 2121 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 2958 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.25ms SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 120.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:51,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 2958 Invalid, 131 Unknown, 0 Unchecked, 4.25ms Time], IncrementalHoareTripleChecker [78 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 120.24ms Time] [2021-11-12 23:10:51,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-11-12 23:10:51,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 2202. [2021-11-12 23:10:51,699 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) [2021-11-12 23:10:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 3219 transitions. [2021-11-12 23:10:51,709 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 3219 transitions. Word has length 175 [2021-11-12 23:10:51,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:51,710 INFO L470 AbstractCegarLoop]: Abstraction has 2202 states and 3219 transitions. [2021-11-12 23:10:51,710 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) [2021-11-12 23:10:51,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 3219 transitions. [2021-11-12 23:10:51,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-12 23:10:51,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:51,717 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] [2021-11-12 23:10:51,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:51,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:51,935 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:51,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:51,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1758832827, now seen corresponding path program 1 times [2021-11-12 23:10:51,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:51,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810920536] [2021-11-12 23:10:51,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:51,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:51,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:51,937 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:51,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:10:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:52,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:10:52,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:10:52,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:10:52,965 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:52,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810920536] [2021-11-12 23:10:52,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810920536] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:52,966 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:52,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:10:52,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224672909] [2021-11-12 23:10:52,966 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:52,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:10:52,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:52,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:10:52,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:10:52,967 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) [2021-11-12 23:10:53,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:53,160 INFO L93 Difference]: Finished difference Result 3778 states and 5470 transitions. [2021-11-12 23:10:53,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:10:53,161 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 [2021-11-12 23:10:53,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:53,179 INFO L225 Difference]: With dead ends: 3778 [2021-11-12 23:10:53,179 INFO L226 Difference]: Without dead ends: 2476 [2021-11-12 23:10:53,185 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 [2021-11-12 23:10:53,186 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 169 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.77ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.28ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:53,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 1883 Invalid, 26 Unknown, 0 Unchecked, 2.77ms Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 76.28ms Time] [2021-11-12 23:10:53,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2021-11-12 23:10:53,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 2460. [2021-11-12 23:10:53,384 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) [2021-11-12 23:10:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 3643 transitions. [2021-11-12 23:10:53,395 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 3643 transitions. Word has length 197 [2021-11-12 23:10:53,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:53,397 INFO L470 AbstractCegarLoop]: Abstraction has 2460 states and 3643 transitions. [2021-11-12 23:10:53,397 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) [2021-11-12 23:10:53,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 3643 transitions. [2021-11-12 23:10:53,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-12 23:10:53,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:53,408 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] [2021-11-12 23:10:53,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:53,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:53,622 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:53,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:53,623 INFO L85 PathProgramCache]: Analyzing trace with hash -939921117, now seen corresponding path program 1 times [2021-11-12 23:10:53,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:53,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397508184] [2021-11-12 23:10:53,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:53,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:53,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:53,625 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:53,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:10:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:54,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:10:54,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:10:54,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:10:54,680 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:54,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397508184] [2021-11-12 23:10:54,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397508184] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:54,681 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:54,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:10:54,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282285358] [2021-11-12 23:10:54,681 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:54,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:10:54,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:54,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:10:54,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:10:54,684 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) [2021-11-12 23:10:54,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:54,886 INFO L93 Difference]: Finished difference Result 5148 states and 7696 transitions. [2021-11-12 23:10:54,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:10:54,887 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 [2021-11-12 23:10:54,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:54,919 INFO L225 Difference]: With dead ends: 5148 [2021-11-12 23:10:54,919 INFO L226 Difference]: Without dead ends: 2856 [2021-11-12 23:10:54,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:10:54,929 INFO L933 BasicCegarLoop]: 867 mSDtfsCounter, 165 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.66ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:54,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 1664 Invalid, 4 Unknown, 0 Unchecked, 2.66ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 4.43ms Time] [2021-11-12 23:10:54,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-11-12 23:10:55,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2824. [2021-11-12 23:10:55,166 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) [2021-11-12 23:10:55,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 4245 transitions. [2021-11-12 23:10:55,178 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 4245 transitions. Word has length 188 [2021-11-12 23:10:55,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:55,179 INFO L470 AbstractCegarLoop]: Abstraction has 2824 states and 4245 transitions. [2021-11-12 23:10:55,179 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) [2021-11-12 23:10:55,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 4245 transitions. [2021-11-12 23:10:55,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-12 23:10:55,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:55,191 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] [2021-11-12 23:10:55,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:55,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:55,406 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:55,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:55,406 INFO L85 PathProgramCache]: Analyzing trace with hash -2061696159, now seen corresponding path program 1 times [2021-11-12 23:10:55,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:55,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760360129] [2021-11-12 23:10:55,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:55,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:55,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:55,408 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:55,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:10:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:55,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:10:55,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:10:56,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:10:56,475 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:56,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760360129] [2021-11-12 23:10:56,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760360129] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:56,475 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:56,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:10:56,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705150972] [2021-11-12 23:10:56,479 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:56,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:10:56,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:56,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:10:56,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:10:56,481 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) [2021-11-12 23:10:56,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:56,679 INFO L93 Difference]: Finished difference Result 6266 states and 9568 transitions. [2021-11-12 23:10:56,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:10:56,680 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 [2021-11-12 23:10:56,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:56,696 INFO L225 Difference]: With dead ends: 6266 [2021-11-12 23:10:56,696 INFO L226 Difference]: Without dead ends: 3632 [2021-11-12 23:10:56,706 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 [2021-11-12 23:10:56,707 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 163 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1710 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.06ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.04ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:56,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1710 Invalid, 4 Unknown, 0 Unchecked, 2.06ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 6.04ms Time] [2021-11-12 23:10:56,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2021-11-12 23:10:56,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 3600. [2021-11-12 23:10:56,979 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) [2021-11-12 23:10:56,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3600 states to 3600 states and 5543 transitions. [2021-11-12 23:10:56,992 INFO L78 Accepts]: Start accepts. Automaton has 3600 states and 5543 transitions. Word has length 210 [2021-11-12 23:10:56,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:56,993 INFO L470 AbstractCegarLoop]: Abstraction has 3600 states and 5543 transitions. [2021-11-12 23:10:56,993 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) [2021-11-12 23:10:56,993 INFO L276 IsEmpty]: Start isEmpty. Operand 3600 states and 5543 transitions. [2021-11-12 23:10:57,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-12 23:10:57,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:57,015 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] [2021-11-12 23:10:57,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:57,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:57,238 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:57,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:57,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1436344621, now seen corresponding path program 1 times [2021-11-12 23:10:57,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:57,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005089955] [2021-11-12 23:10:57,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:57,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:57,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:57,240 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:57,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:10:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:57,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:10:57,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:10:57,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:10:58,330 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:10:58,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005089955] [2021-11-12 23:10:58,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005089955] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:58,331 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:58,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:10:58,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82465146] [2021-11-12 23:10:58,331 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:58,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:10:58,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:10:58,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:10:58,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:10:58,333 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) [2021-11-12 23:10:58,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:58,730 INFO L93 Difference]: Finished difference Result 8558 states and 13396 transitions. [2021-11-12 23:10:58,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:10:58,731 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 [2021-11-12 23:10:58,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:58,764 INFO L225 Difference]: With dead ends: 8558 [2021-11-12 23:10:58,764 INFO L226 Difference]: Without dead ends: 5168 [2021-11-12 23:10:58,777 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 [2021-11-12 23:10:58,778 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 161 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.82ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.12ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:58,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 1704 Invalid, 4 Unknown, 0 Unchecked, 2.82ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 7.12ms Time] [2021-11-12 23:10:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5168 states. [2021-11-12 23:10:59,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5168 to 5136. [2021-11-12 23:10:59,246 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) [2021-11-12 23:10:59,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5136 states to 5136 states and 8093 transitions. [2021-11-12 23:10:59,264 INFO L78 Accepts]: Start accepts. Automaton has 5136 states and 8093 transitions. Word has length 211 [2021-11-12 23:10:59,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:59,265 INFO L470 AbstractCegarLoop]: Abstraction has 5136 states and 8093 transitions. [2021-11-12 23:10:59,265 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) [2021-11-12 23:10:59,265 INFO L276 IsEmpty]: Start isEmpty. Operand 5136 states and 8093 transitions. [2021-11-12 23:10:59,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-12 23:10:59,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:59,299 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] [2021-11-12 23:10:59,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:59,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:10:59,519 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:59,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:59,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1486895738, now seen corresponding path program 1 times [2021-11-12 23:10:59,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:10:59,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763202919] [2021-11-12 23:10:59,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:59,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:10:59,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:10:59,521 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:10:59,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:10:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:59,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:10:59,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:00,186 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:11:00,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:11:00,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:00,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763202919] [2021-11-12 23:11:00,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763202919] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:00,496 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:00,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:11:00,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5832670] [2021-11-12 23:11:00,496 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:00,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:11:00,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:00,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:11:00,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:11:00,497 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) [2021-11-12 23:11:01,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:01,242 INFO L93 Difference]: Finished difference Result 12952 states and 20762 transitions. [2021-11-12 23:11:01,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:11:01,243 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 [2021-11-12 23:11:01,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:01,281 INFO L225 Difference]: With dead ends: 12952 [2021-11-12 23:11:01,281 INFO L226 Difference]: Without dead ends: 8052 [2021-11-12 23:11:01,299 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 [2021-11-12 23:11:01,301 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 159 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1698 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.87ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.62ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:01,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 1698 Invalid, 4 Unknown, 0 Unchecked, 2.87ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 17.62ms Time] [2021-11-12 23:11:01,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8052 states. [2021-11-12 23:11:02,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8052 to 8020. [2021-11-12 23:11:02,030 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) [2021-11-12 23:11:02,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8020 states to 8020 states and 12927 transitions. [2021-11-12 23:11:02,059 INFO L78 Accepts]: Start accepts. Automaton has 8020 states and 12927 transitions. Word has length 191 [2021-11-12 23:11:02,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:02,060 INFO L470 AbstractCegarLoop]: Abstraction has 8020 states and 12927 transitions. [2021-11-12 23:11:02,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 23:11:02,060 INFO L276 IsEmpty]: Start isEmpty. Operand 8020 states and 12927 transitions. [2021-11-12 23:11:02,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-12 23:11:02,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:02,085 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] [2021-11-12 23:11:02,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-12 23:11:02,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:02,298 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:02,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:02,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1203958411, now seen corresponding path program 1 times [2021-11-12 23:11:02,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:02,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361267178] [2021-11-12 23:11:02,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:02,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:02,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:02,302 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:02,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:11:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:02,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:11:02,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:11:03,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:11:03,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:03,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361267178] [2021-11-12 23:11:03,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361267178] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:03,384 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:03,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:11:03,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499167722] [2021-11-12 23:11:03,385 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:03,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:11:03,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:03,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:11:03,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:11:03,387 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) [2021-11-12 23:11:04,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:04,185 INFO L93 Difference]: Finished difference Result 21322 states and 34848 transitions. [2021-11-12 23:11:04,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:11:04,185 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 [2021-11-12 23:11:04,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:04,245 INFO L225 Difference]: With dead ends: 21322 [2021-11-12 23:11:04,245 INFO L226 Difference]: Without dead ends: 13560 [2021-11-12 23:11:04,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:11:04,270 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 157 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1698 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.08ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:04,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 1698 Invalid, 4 Unknown, 0 Unchecked, 2.08ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 3.86ms Time] [2021-11-12 23:11:04,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13560 states. [2021-11-12 23:11:05,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13560 to 13528. [2021-11-12 23:11:05,259 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) [2021-11-12 23:11:05,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13528 states to 13528 states and 22177 transitions. [2021-11-12 23:11:05,308 INFO L78 Accepts]: Start accepts. Automaton has 13528 states and 22177 transitions. Word has length 192 [2021-11-12 23:11:05,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:05,309 INFO L470 AbstractCegarLoop]: Abstraction has 13528 states and 22177 transitions. [2021-11-12 23:11:05,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 23:11:05,309 INFO L276 IsEmpty]: Start isEmpty. Operand 13528 states and 22177 transitions. [2021-11-12 23:11:05,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-12 23:11:05,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:05,338 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, 1, 1, 1] [2021-11-12 23:11:05,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:05,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:05,556 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:05,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:05,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1333406107, now seen corresponding path program 1 times [2021-11-12 23:11:05,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:05,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63652839] [2021-11-12 23:11:05,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:05,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:05,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:05,559 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:05,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:11:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:06,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:11:06,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:11:06,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:11:06,903 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:06,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63652839] [2021-11-12 23:11:06,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63652839] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:06,904 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:06,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:11:06,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667461679] [2021-11-12 23:11:06,904 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:06,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:11:06,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:06,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:11:06,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:11:06,905 INFO L87 Difference]: Start difference. First operand 13528 states and 22177 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2021-11-12 23:11:08,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:08,218 INFO L93 Difference]: Finished difference Result 37308 states and 61668 transitions. [2021-11-12 23:11:08,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:11:08,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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 214 [2021-11-12 23:11:08,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:08,326 INFO L225 Difference]: With dead ends: 37308 [2021-11-12 23:11:08,326 INFO L226 Difference]: Without dead ends: 24060 [2021-11-12 23:11:08,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:11:08,359 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 155 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.12ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.98ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:08,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 1721 Invalid, 4 Unknown, 0 Unchecked, 2.12ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 17.98ms Time] [2021-11-12 23:11:08,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24060 states. [2021-11-12 23:11:10,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24060 to 24028. [2021-11-12 23:11:10,294 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) [2021-11-12 23:11:10,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24028 states to 24028 states and 39715 transitions. [2021-11-12 23:11:10,382 INFO L78 Accepts]: Start accepts. Automaton has 24028 states and 39715 transitions. Word has length 214 [2021-11-12 23:11:10,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:10,383 INFO L470 AbstractCegarLoop]: Abstraction has 24028 states and 39715 transitions. [2021-11-12 23:11:10,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2021-11-12 23:11:10,384 INFO L276 IsEmpty]: Start isEmpty. Operand 24028 states and 39715 transitions. [2021-11-12 23:11:10,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-12 23:11:10,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:10,414 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] [2021-11-12 23:11:10,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:10,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:10,643 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:10,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:10,643 INFO L85 PathProgramCache]: Analyzing trace with hash -110255995, now seen corresponding path program 1 times [2021-11-12 23:11:10,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:10,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408468018] [2021-11-12 23:11:10,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:10,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:10,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:10,646 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:10,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:11:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:11,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:11:11,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:11:11,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:11,813 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:11:11,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:11,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408468018] [2021-11-12 23:11:11,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408468018] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:11,813 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:11,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:11:11,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850443266] [2021-11-12 23:11:11,814 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:11,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:11:11,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:11,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:11:11,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:11:11,816 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) [2021-11-12 23:11:13,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:13,157 INFO L93 Difference]: Finished difference Result 47700 states and 78904 transitions. [2021-11-12 23:11:13,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:11:13,157 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 [2021-11-12 23:11:13,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:13,258 INFO L225 Difference]: With dead ends: 47700 [2021-11-12 23:11:13,259 INFO L226 Difference]: Without dead ends: 24060 [2021-11-12 23:11:13,306 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 [2021-11-12 23:11:13,307 INFO L933 BasicCegarLoop]: 1018 mSDtfsCounter, 151 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 2740 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.28ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.75ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:13,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 2740 Invalid, 5 Unknown, 0 Unchecked, 3.28ms Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 14.75ms Time] [2021-11-12 23:11:13,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24060 states. [2021-11-12 23:11:15,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24060 to 24028. [2021-11-12 23:11:15,567 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) [2021-11-12 23:11:15,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24028 states to 24028 states and 39587 transitions. [2021-11-12 23:11:15,652 INFO L78 Accepts]: Start accepts. Automaton has 24028 states and 39587 transitions. Word has length 194 [2021-11-12 23:11:15,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:15,652 INFO L470 AbstractCegarLoop]: Abstraction has 24028 states and 39587 transitions. [2021-11-12 23:11:15,653 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) [2021-11-12 23:11:15,653 INFO L276 IsEmpty]: Start isEmpty. Operand 24028 states and 39587 transitions. [2021-11-12 23:11:15,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-12 23:11:15,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:15,682 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] [2021-11-12 23:11:15,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:15,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:15,901 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:15,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:15,902 INFO L85 PathProgramCache]: Analyzing trace with hash 785447392, now seen corresponding path program 1 times [2021-11-12 23:11:15,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:15,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533439452] [2021-11-12 23:11:15,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:15,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:15,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:15,904 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:15,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:11:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:16,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:11:16,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:11:16,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:11:17,046 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:17,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533439452] [2021-11-12 23:11:17,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533439452] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:17,046 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:17,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:11:17,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271173744] [2021-11-12 23:11:17,046 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:17,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:11:17,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:17,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:11:17,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:11:17,048 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) [2021-11-12 23:11:20,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:20,032 INFO L93 Difference]: Finished difference Result 68532 states and 113489 transitions. [2021-11-12 23:11:20,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:11:20,033 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 [2021-11-12 23:11:20,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:20,219 INFO L225 Difference]: With dead ends: 68532 [2021-11-12 23:11:20,219 INFO L226 Difference]: Without dead ends: 44804 [2021-11-12 23:11:20,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:11:20,282 INFO L933 BasicCegarLoop]: 864 mSDtfsCounter, 153 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.22ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.12ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:20,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 1703 Invalid, 4 Unknown, 0 Unchecked, 2.22ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 4.12ms Time] [2021-11-12 23:11:20,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44804 states. [2021-11-12 23:11:24,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44804 to 44772. [2021-11-12 23:11:24,826 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) [2021-11-12 23:11:24,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44772 states to 44772 states and 74025 transitions. [2021-11-12 23:11:24,992 INFO L78 Accepts]: Start accepts. Automaton has 44772 states and 74025 transitions. Word has length 194 [2021-11-12 23:11:24,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:11:24,993 INFO L470 AbstractCegarLoop]: Abstraction has 44772 states and 74025 transitions. [2021-11-12 23:11:24,993 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) [2021-11-12 23:11:24,994 INFO L276 IsEmpty]: Start isEmpty. Operand 44772 states and 74025 transitions. [2021-11-12 23:11:25,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-12 23:11:25,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:11:25,046 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] [2021-11-12 23:11:25,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:11:25,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:11:25,255 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__before__EncryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:11:25,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:11:25,256 INFO L85 PathProgramCache]: Analyzing trace with hash 272876496, now seen corresponding path program 1 times [2021-11-12 23:11:25,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:11:25,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524759465] [2021-11-12 23:11:25,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:11:25,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:11:25,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:11:25,276 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:11:25,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6e33300-c3a2-4636-9dd7-169de3f058f9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:11:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:11:25,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:11:25,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:11:26,059 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:11:26,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:11:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:11:26,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:11:26,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524759465] [2021-11-12 23:11:26,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524759465] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:11:26,414 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:11:26,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:11:26,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054771835] [2021-11-12 23:11:26,414 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:11:26,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:11:26,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:11:26,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:11:26,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:11:26,416 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) [2021-11-12 23:11:31,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:11:31,680 INFO L93 Difference]: Finished difference Result 121228 states and 199299 transitions. [2021-11-12 23:11:31,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:11:31,681 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 [2021-11-12 23:11:31,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:11:31,968 INFO L225 Difference]: With dead ends: 121228 [2021-11-12 23:11:31,969 INFO L226 Difference]: Without dead ends: 76808 [2021-11-12 23:11:32,072 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 [2021-11-12 23:11:32,074 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 151 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.40ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.13ms IncrementalHoareTripleChecker+Time [2021-11-12 23:11:32,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 1685 Invalid, 4 Unknown, 0 Unchecked, 2.40ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 4.13ms Time] [2021-11-12 23:11:32,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76808 states.