./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec27_productSimulator.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fe4506e3d5e012e1662dc0aa7741c8e3f8f99dc7c5ccf1f202c2f95071bfbf64 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:16:26,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:16:26,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:16:26,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:16:26,656 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:16:26,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:16:26,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:16:26,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:16:26,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:16:26,678 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:16:26,679 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:16:26,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:16:26,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:16:26,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:16:26,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:16:26,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:16:26,695 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:16:26,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:16:26,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:16:26,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:16:26,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:16:26,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:16:26,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:16:26,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:16:26,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:16:26,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:16:26,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:16:26,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:16:26,731 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:16:26,732 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:16:26,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:16:26,734 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:16:26,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:16:26,737 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:16:26,739 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:16:26,740 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:16:26,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:16:26,741 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:16:26,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:16:26,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:16:26,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:16:26,744 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:16:26,791 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:16:26,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:16:26,793 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:16:26,794 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:16:26,794 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:16:26,794 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:16:26,795 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:16:26,795 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:16:26,795 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:16:26,795 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:16:26,803 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:16:26,803 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:16:26,804 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:16:26,804 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:16:26,804 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:16:26,805 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:16:26,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:16:26,806 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:16:26,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:16:26,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:16:26,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:16:26,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:16:26,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:16:26,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:16:26,807 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:16:26,808 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:16:26,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:16:26,808 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:16:26,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:16:26,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:16:26,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:16:26,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:26,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:16:26,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:16:26,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:16:26,812 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:16:26,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:16:26,813 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:16:26,813 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:16:26,813 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:16:26,813 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_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe4506e3d5e012e1662dc0aa7741c8e3f8f99dc7c5ccf1f202c2f95071bfbf64 [2021-11-19 14:16:27,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:16:27,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:16:27,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:16:27,207 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:16:27,208 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:16:27,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/email_spec27_productSimulator.cil.c [2021-11-19 14:16:27,288 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/data/ee5674e0f/3d7bf3f6f81a4e3cbe79e8f2d5b2223d/FLAGa08855cc2 [2021-11-19 14:16:28,012 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:16:28,013 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/sv-benchmarks/c/product-lines/email_spec27_productSimulator.cil.c [2021-11-19 14:16:28,042 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/data/ee5674e0f/3d7bf3f6f81a4e3cbe79e8f2d5b2223d/FLAGa08855cc2 [2021-11-19 14:16:28,175 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/data/ee5674e0f/3d7bf3f6f81a4e3cbe79e8f2d5b2223d [2021-11-19 14:16:28,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:16:28,180 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:16:28,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:28,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:16:28,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:16:28,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:28" (1/1) ... [2021-11-19 14:16:28,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7042200e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:28, skipping insertion in model container [2021-11-19 14:16:28,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:28" (1/1) ... [2021-11-19 14:16:28,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:16:28,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:16:28,759 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/sv-benchmarks/c/product-lines/email_spec27_productSimulator.cil.c[11237,11250] [2021-11-19 14:16:29,234 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:29,255 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:16:29,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@679058c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:29, skipping insertion in model container [2021-11-19 14:16:29,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:29,257 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:16:29,258 INFO L158 Benchmark]: Toolchain (without parser) took 1077.25ms. Allocated memory is still 111.1MB. Free memory was 72.3MB in the beginning and 69.4MB in the end (delta: 2.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 14:16:29,259 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 111.1MB. Free memory was 84.7MB in the beginning and 84.6MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:16:29,261 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1070.79ms. Allocated memory is still 111.1MB. Free memory was 72.1MB in the beginning and 69.4MB in the end (delta: 2.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 14:16:29,263 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 111.1MB. Free memory was 84.7MB in the beginning and 84.6MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1070.79ms. Allocated memory is still 111.1MB. Free memory was 72.1MB in the beginning and 69.4MB in the end (delta: 2.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: 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_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fe4506e3d5e012e1662dc0aa7741c8e3f8f99dc7c5ccf1f202c2f95071bfbf64 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:16:31,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:16:31,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:16:31,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:16:31,939 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:16:31,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:16:31,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:16:31,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:16:31,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:16:31,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:16:31,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:16:31,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:16:31,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:16:31,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:16:31,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:16:31,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:16:31,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:16:31,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:16:31,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:16:31,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:16:32,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:16:32,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:16:32,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:16:32,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:16:32,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:16:32,018 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:16:32,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:16:32,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:16:32,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:16:32,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:16:32,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:16:32,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:16:32,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:16:32,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:16:32,031 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:16:32,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:16:32,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:16:32,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:16:32,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:16:32,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:16:32,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:16:32,037 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:16:32,092 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:16:32,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:16:32,094 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:16:32,094 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:16:32,095 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:16:32,095 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:16:32,095 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:16:32,096 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:16:32,096 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:16:32,096 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:16:32,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:16:32,099 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:16:32,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:16:32,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:16:32,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:16:32,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:16:32,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:16:32,101 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:16:32,101 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:16:32,101 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:16:32,101 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:16:32,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:16:32,102 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:16:32,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:16:32,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:16:32,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:16:32,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:16:32,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:32,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:16:32,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:16:32,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:16:32,104 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:16:32,105 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:16:32,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:16:32,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:16:32,106 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:16:32,106 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_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe4506e3d5e012e1662dc0aa7741c8e3f8f99dc7c5ccf1f202c2f95071bfbf64 [2021-11-19 14:16:32,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:16:32,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:16:32,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:16:32,590 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:16:32,591 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:16:32,593 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/email_spec27_productSimulator.cil.c [2021-11-19 14:16:32,680 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/data/b51c38b8f/5415af760ea74192a9738b9dbb182df2/FLAG279ddefa3 [2021-11-19 14:16:33,622 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:16:33,625 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/sv-benchmarks/c/product-lines/email_spec27_productSimulator.cil.c [2021-11-19 14:16:33,671 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/data/b51c38b8f/5415af760ea74192a9738b9dbb182df2/FLAG279ddefa3 [2021-11-19 14:16:33,698 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/data/b51c38b8f/5415af760ea74192a9738b9dbb182df2 [2021-11-19 14:16:33,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:16:33,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:16:33,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:33,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:16:33,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:16:33,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:33" (1/1) ... [2021-11-19 14:16:33,744 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17c0d786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:33, skipping insertion in model container [2021-11-19 14:16:33,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:33" (1/1) ... [2021-11-19 14:16:33,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:16:33,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:16:34,128 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/sv-benchmarks/c/product-lines/email_spec27_productSimulator.cil.c[11237,11250] [2021-11-19 14:16:34,488 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:34,539 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:16:34,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:16:34,619 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/sv-benchmarks/c/product-lines/email_spec27_productSimulator.cil.c[11237,11250] [2021-11-19 14:16:34,801 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:34,809 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:16:34,864 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/sv-benchmarks/c/product-lines/email_spec27_productSimulator.cil.c[11237,11250] [2021-11-19 14:16:34,949 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:34,997 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:16:34,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:34 WrapperNode [2021-11-19 14:16:34,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:34,999 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:16:34,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:16:34,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:16:35,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:34" (1/1) ... [2021-11-19 14:16:35,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:34" (1/1) ... [2021-11-19 14:16:35,129 INFO L137 Inliner]: procedures = 153, calls = 284, calls flagged for inlining = 66, calls inlined = 63, statements flattened = 1227 [2021-11-19 14:16:35,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:16:35,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:16:35,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:16:35,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:16:35,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:34" (1/1) ... [2021-11-19 14:16:35,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:34" (1/1) ... [2021-11-19 14:16:35,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:34" (1/1) ... [2021-11-19 14:16:35,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:34" (1/1) ... [2021-11-19 14:16:35,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:34" (1/1) ... [2021-11-19 14:16:35,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:34" (1/1) ... [2021-11-19 14:16:35,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:34" (1/1) ... [2021-11-19 14:16:35,238 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:16:35,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:16:35,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:16:35,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:16:35,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:34" (1/1) ... [2021-11-19 14:16:35,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:35,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:16:35,294 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:16:35,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:16:35,355 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2021-11-19 14:16:35,356 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2021-11-19 14:16:35,356 INFO L130 BoogieDeclarations]: Found specification of procedure setup_chuck__before__Keys [2021-11-19 14:16:35,357 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_chuck__before__Keys [2021-11-19 14:16:35,357 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Sign [2021-11-19 14:16:35,357 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Sign [2021-11-19 14:16:35,357 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookSize [2021-11-19 14:16:35,357 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookSize [2021-11-19 14:16:35,358 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2021-11-19 14:16:35,358 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2021-11-19 14:16:35,358 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookAddress [2021-11-19 14:16:35,358 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookAddress [2021-11-19 14:16:35,358 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2021-11-19 14:16:35,358 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2021-11-19 14:16:35,359 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Verify [2021-11-19 14:16:35,359 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Verify [2021-11-19 14:16:35,359 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-11-19 14:16:35,359 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-11-19 14:16:35,359 INFO L130 BoogieDeclarations]: Found specification of procedure setup_bob__before__Keys [2021-11-19 14:16:35,360 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_bob__before__Keys [2021-11-19 14:16:35,360 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-11-19 14:16:35,360 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-11-19 14:16:35,360 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-11-19 14:16:35,360 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-11-19 14:16:35,360 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2021-11-19 14:16:35,361 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2021-11-19 14:16:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Decrypt [2021-11-19 14:16:35,361 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Decrypt [2021-11-19 14:16:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Encrypt [2021-11-19 14:16:35,361 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Encrypt [2021-11-19 14:16:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2021-11-19 14:16:35,362 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2021-11-19 14:16:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2021-11-19 14:16:35,363 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2021-11-19 14:16:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2021-11-19 14:16:35,363 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2021-11-19 14:16:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-19 14:16:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Forward [2021-11-19 14:16:35,364 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Forward [2021-11-19 14:16:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2021-11-19 14:16:35,364 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2021-11-19 14:16:35,365 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2021-11-19 14:16:35,365 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2021-11-19 14:16:35,365 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-11-19 14:16:35,365 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-11-19 14:16:35,366 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable__before__Encrypt [2021-11-19 14:16:35,366 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable__before__Encrypt [2021-11-19 14:16:35,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:16:35,367 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2021-11-19 14:16:35,368 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2021-11-19 14:16:35,368 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2021-11-19 14:16:35,369 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2021-11-19 14:16:35,369 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__AddressBook [2021-11-19 14:16:35,370 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__AddressBook [2021-11-19 14:16:35,370 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Encrypt [2021-11-19 14:16:35,370 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Encrypt [2021-11-19 14:16:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__AutoResponder [2021-11-19 14:16:35,371 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__AutoResponder [2021-11-19 14:16:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookSize [2021-11-19 14:16:35,372 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookSize [2021-11-19 14:16:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2021-11-19 14:16:35,372 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2021-11-19 14:16:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2021-11-19 14:16:35,372 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2021-11-19 14:16:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-11-19 14:16:35,373 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-11-19 14:16:35,373 INFO L130 BoogieDeclarations]: Found specification of procedure isVerified [2021-11-19 14:16:35,373 INFO L138 BoogieDeclarations]: Found implementation of procedure isVerified [2021-11-19 14:16:35,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:16:35,374 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2021-11-19 14:16:35,374 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2021-11-19 14:16:35,374 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-11-19 14:16:35,375 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-11-19 14:16:35,375 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2021-11-19 14:16:35,375 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2021-11-19 14:16:35,375 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rjh__before__Keys [2021-11-19 14:16:35,375 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rjh__before__Keys [2021-11-19 14:16:35,376 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Verify [2021-11-19 14:16:35,376 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Verify [2021-11-19 14:16:35,376 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2021-11-19 14:16:35,376 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2021-11-19 14:16:35,376 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-11-19 14:16:35,376 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-11-19 14:16:35,377 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2021-11-19 14:16:35,377 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2021-11-19 14:16:35,378 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Sign [2021-11-19 14:16:35,378 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Sign [2021-11-19 14:16:35,395 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2021-11-19 14:16:35,395 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2021-11-19 14:16:35,396 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookAddress [2021-11-19 14:16:35,396 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookAddress [2021-11-19 14:16:35,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:16:35,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:16:35,779 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:16:35,785 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:16:37,112 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:16:37,140 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:16:37,140 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:16:37,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:16:37 BoogieIcfgContainer [2021-11-19 14:16:37,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:16:37,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:16:37,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:16:37,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:16:37,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:16:33" (1/3) ... [2021-11-19 14:16:37,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fdf867c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:16:37, skipping insertion in model container [2021-11-19 14:16:37,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:34" (2/3) ... [2021-11-19 14:16:37,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fdf867c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:16:37, skipping insertion in model container [2021-11-19 14:16:37,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:16:37" (3/3) ... [2021-11-19 14:16:37,154 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec27_productSimulator.cil.c [2021-11-19 14:16:37,160 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:16:37,163 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:16:37,239 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:16:37,249 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:16:37,249 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:16:37,310 INFO L276 IsEmpty]: Start isEmpty. Operand has 608 states, 450 states have (on average 1.5133333333333334) internal successors, (681), 470 states have internal predecessors, (681), 112 states have call successors, (112), 44 states have call predecessors, (112), 44 states have return successors, (112), 111 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-19 14:16:37,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-19 14:16:37,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:37,347 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:37,348 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:37,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:37,354 INFO L85 PathProgramCache]: Analyzing trace with hash -779208577, now seen corresponding path program 1 times [2021-11-19 14:16:37,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:37,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919585729] [2021-11-19 14:16:37,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:37,392 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:37,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:37,397 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:37,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:16:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:37,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:16:37,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 14:16:38,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:38,815 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 14:16:38,816 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:38,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919585729] [2021-11-19 14:16:38,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919585729] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:38,817 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:38,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:16:38,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754324136] [2021-11-19 14:16:38,820 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:38,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:16:38,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:38,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:16:38,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:16:38,872 INFO L87 Difference]: Start difference. First operand has 608 states, 450 states have (on average 1.5133333333333334) internal successors, (681), 470 states have internal predecessors, (681), 112 states have call successors, (112), 44 states have call predecessors, (112), 44 states have return successors, (112), 111 states have call predecessors, (112), 112 states have call successors, (112) Second operand has 2 states, 2 states have (on average 51.5) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:16:38,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:38,996 INFO L93 Difference]: Finished difference Result 947 states and 1397 transitions. [2021-11-19 14:16:38,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:16:38,999 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 51.5) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 158 [2021-11-19 14:16:39,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:39,024 INFO L225 Difference]: With dead ends: 947 [2021-11-19 14:16:39,025 INFO L226 Difference]: Without dead ends: 601 [2021-11-19 14:16:39,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:16:39,039 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:39,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:16:39,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-19 14:16:39,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2021-11-19 14:16:39,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 444 states have (on average 1.509009009009009) internal successors, (670), 463 states have internal predecessors, (670), 112 states have call successors, (112), 44 states have call predecessors, (112), 44 states have return successors, (111), 110 states have call predecessors, (111), 111 states have call successors, (111) [2021-11-19 14:16:39,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 893 transitions. [2021-11-19 14:16:39,212 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 893 transitions. Word has length 158 [2021-11-19 14:16:39,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:39,215 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 893 transitions. [2021-11-19 14:16:39,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 51.5) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 14:16:39,216 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 893 transitions. [2021-11-19 14:16:39,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-19 14:16:39,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:39,225 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:39,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:39,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:39,439 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:39,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:39,440 INFO L85 PathProgramCache]: Analyzing trace with hash 487465451, now seen corresponding path program 1 times [2021-11-19 14:16:39,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:39,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087201113] [2021-11-19 14:16:39,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:39,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:39,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:39,443 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:39,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:16:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:39,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:16:39,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 14:16:40,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 14:16:40,608 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:40,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087201113] [2021-11-19 14:16:40,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087201113] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:40,609 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:40,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-19 14:16:40,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673585262] [2021-11-19 14:16:40,616 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:40,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:16:40,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:40,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:16:40,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:16:40,623 INFO L87 Difference]: Start difference. First operand 601 states and 893 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-19 14:16:40,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:40,753 INFO L93 Difference]: Finished difference Result 1166 states and 1730 transitions. [2021-11-19 14:16:40,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:16:40,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 159 [2021-11-19 14:16:40,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:40,763 INFO L225 Difference]: With dead ends: 1166 [2021-11-19 14:16:40,763 INFO L226 Difference]: Without dead ends: 601 [2021-11-19 14:16:40,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:16:40,768 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 3 mSDsluCounter, 2662 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3553 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:40,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 3553 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:16:40,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-19 14:16:40,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2021-11-19 14:16:40,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 444 states have (on average 1.4932432432432432) internal successors, (663), 463 states have internal predecessors, (663), 112 states have call successors, (112), 44 states have call predecessors, (112), 44 states have return successors, (111), 110 states have call predecessors, (111), 111 states have call successors, (111) [2021-11-19 14:16:40,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 886 transitions. [2021-11-19 14:16:40,836 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 886 transitions. Word has length 159 [2021-11-19 14:16:40,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:40,837 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 886 transitions. [2021-11-19 14:16:40,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-19 14:16:40,837 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 886 transitions. [2021-11-19 14:16:40,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-19 14:16:40,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:40,843 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:40,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:41,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:41,061 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:41,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:41,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1007719467, now seen corresponding path program 1 times [2021-11-19 14:16:41,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:41,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719087259] [2021-11-19 14:16:41,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:41,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:41,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:41,064 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:41,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:16:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:41,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:16:41,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-19 14:16:41,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 14:16:42,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:42,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719087259] [2021-11-19 14:16:42,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719087259] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:42,444 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:42,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:16:42,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777102882] [2021-11-19 14:16:42,444 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:42,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:16:42,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:42,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:16:42,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:16:42,447 INFO L87 Difference]: Start difference. First operand 601 states and 886 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 4 states have call successors, (50), 4 states have call predecessors, (50), 3 states have return successors, (35), 4 states have call predecessors, (35), 4 states have call successors, (35) [2021-11-19 14:16:42,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:42,586 INFO L93 Difference]: Finished difference Result 1170 states and 1738 transitions. [2021-11-19 14:16:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:16:42,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 4 states have call successors, (50), 4 states have call predecessors, (50), 3 states have return successors, (35), 4 states have call predecessors, (35), 4 states have call successors, (35) Word has length 164 [2021-11-19 14:16:42,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:42,595 INFO L225 Difference]: With dead ends: 1170 [2021-11-19 14:16:42,595 INFO L226 Difference]: Without dead ends: 602 [2021-11-19 14:16:42,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:16:42,602 INFO L933 BasicCegarLoop]: 877 mSDtfsCounter, 790 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:42,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [790 Valid, 925 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:16:42,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-11-19 14:16:42,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 602. [2021-11-19 14:16:42,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 446 states have (on average 1.484304932735426) internal successors, (662), 463 states have internal predecessors, (662), 110 states have call successors, (110), 45 states have call predecessors, (110), 45 states have return successors, (109), 108 states have call predecessors, (109), 109 states have call successors, (109) [2021-11-19 14:16:42,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 881 transitions. [2021-11-19 14:16:42,671 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 881 transitions. Word has length 164 [2021-11-19 14:16:42,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:42,672 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 881 transitions. [2021-11-19 14:16:42,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 4 states have call successors, (50), 4 states have call predecessors, (50), 3 states have return successors, (35), 4 states have call predecessors, (35), 4 states have call successors, (35) [2021-11-19 14:16:42,672 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 881 transitions. [2021-11-19 14:16:42,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-19 14:16:42,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:42,680 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:42,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:42,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:42,894 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:42,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:42,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1785209514, now seen corresponding path program 1 times [2021-11-19 14:16:42,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:42,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341684838] [2021-11-19 14:16:42,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:42,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:42,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:42,897 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:42,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:16:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:43,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:16:43,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 14:16:43,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 14:16:44,108 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:44,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341684838] [2021-11-19 14:16:44,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341684838] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:44,109 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:44,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:16:44,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723155813] [2021-11-19 14:16:44,110 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:44,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:16:44,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:44,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:16:44,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:16:44,115 INFO L87 Difference]: Start difference. First operand 602 states and 881 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-19 14:16:44,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:44,260 INFO L93 Difference]: Finished difference Result 1718 states and 2550 transitions. [2021-11-19 14:16:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:16:44,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 178 [2021-11-19 14:16:44,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:44,271 INFO L225 Difference]: With dead ends: 1718 [2021-11-19 14:16:44,272 INFO L226 Difference]: Without dead ends: 1150 [2021-11-19 14:16:44,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:16:44,282 INFO L933 BasicCegarLoop]: 998 mSDtfsCounter, 837 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1843 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:44,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [837 Valid, 1843 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:16:44,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2021-11-19 14:16:44,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 1148. [2021-11-19 14:16:44,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 853 states have (on average 1.4912075029308323) internal successors, (1272), 883 states have internal predecessors, (1272), 205 states have call successors, (205), 89 states have call predecessors, (205), 89 states have return successors, (216), 202 states have call predecessors, (216), 203 states have call successors, (216) [2021-11-19 14:16:44,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 1693 transitions. [2021-11-19 14:16:44,374 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 1693 transitions. Word has length 178 [2021-11-19 14:16:44,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:44,377 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 1693 transitions. [2021-11-19 14:16:44,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-19 14:16:44,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 1693 transitions. [2021-11-19 14:16:44,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-19 14:16:44,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:44,386 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:44,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:44,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:44,604 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:44,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:44,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1580096765, now seen corresponding path program 1 times [2021-11-19 14:16:44,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:44,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144975942] [2021-11-19 14:16:44,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:44,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:44,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:44,607 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:44,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:16:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:45,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:16:45,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-19 14:16:45,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:45,892 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 14:16:45,892 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:45,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144975942] [2021-11-19 14:16:45,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144975942] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:45,893 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:45,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:16:45,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349757295] [2021-11-19 14:16:45,893 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:45,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:16:45,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:45,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:16:45,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:16:45,896 INFO L87 Difference]: Start difference. First operand 1148 states and 1693 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-19 14:16:45,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:45,976 INFO L93 Difference]: Finished difference Result 1150 states and 1694 transitions. [2021-11-19 14:16:45,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:16:45,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 179 [2021-11-19 14:16:45,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:45,981 INFO L225 Difference]: With dead ends: 1150 [2021-11-19 14:16:45,982 INFO L226 Difference]: Without dead ends: 603 [2021-11-19 14:16:45,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:16:45,985 INFO L933 BasicCegarLoop]: 867 mSDtfsCounter, 777 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:45,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [777 Valid, 904 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:16:45,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-11-19 14:16:46,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2021-11-19 14:16:46,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 448 states have (on average 1.4732142857142858) internal successors, (660), 463 states have internal predecessors, (660), 108 states have call successors, (108), 46 states have call predecessors, (108), 46 states have return successors, (107), 106 states have call predecessors, (107), 107 states have call successors, (107) [2021-11-19 14:16:46,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 875 transitions. [2021-11-19 14:16:46,025 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 875 transitions. Word has length 179 [2021-11-19 14:16:46,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:46,026 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 875 transitions. [2021-11-19 14:16:46,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-19 14:16:46,026 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 875 transitions. [2021-11-19 14:16:46,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-19 14:16:46,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:46,032 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:46,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:46,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:46,247 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:46,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:46,247 INFO L85 PathProgramCache]: Analyzing trace with hash 2046699704, now seen corresponding path program 1 times [2021-11-19 14:16:46,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:46,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897244547] [2021-11-19 14:16:46,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:46,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:46,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:46,249 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:46,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:16:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:46,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:16:46,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-19 14:16:47,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-19 14:16:47,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:47,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897244547] [2021-11-19 14:16:47,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897244547] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:47,428 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:47,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:16:47,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821800310] [2021-11-19 14:16:47,429 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:47,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:16:47,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:47,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:16:47,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:16:47,431 INFO L87 Difference]: Start difference. First operand 603 states and 875 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, (51), 2 states have call predecessors, (51), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-19 14:16:47,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:47,538 INFO L93 Difference]: Finished difference Result 1160 states and 1690 transitions. [2021-11-19 14:16:47,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:16:47,539 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, (51), 2 states have call predecessors, (51), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 195 [2021-11-19 14:16:47,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:47,544 INFO L225 Difference]: With dead ends: 1160 [2021-11-19 14:16:47,544 INFO L226 Difference]: Without dead ends: 606 [2021-11-19 14:16:47,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:16:47,549 INFO L933 BasicCegarLoop]: 848 mSDtfsCounter, 810 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:47,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [810 Valid, 889 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:16:47,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-11-19 14:16:47,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 600. [2021-11-19 14:16:47,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 448 states have (on average 1.4486607142857142) internal successors, (649), 458 states have internal predecessors, (649), 105 states have call successors, (105), 46 states have call predecessors, (105), 46 states have return successors, (104), 103 states have call predecessors, (104), 104 states have call successors, (104) [2021-11-19 14:16:47,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 858 transitions. [2021-11-19 14:16:47,597 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 858 transitions. Word has length 195 [2021-11-19 14:16:47,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:47,597 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 858 transitions. [2021-11-19 14:16:47,598 INFO L471 AbstractCegarLoop]: INTERPOLANT 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, (51), 2 states have call predecessors, (51), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-19 14:16:47,598 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 858 transitions. [2021-11-19 14:16:47,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-19 14:16:47,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:47,604 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:47,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-19 14:16:47,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:47,827 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:47,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:47,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1578940451, now seen corresponding path program 1 times [2021-11-19 14:16:47,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:47,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887176994] [2021-11-19 14:16:47,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:47,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:47,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:47,831 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:47,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:16:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:48,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:16:48,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-19 14:16:48,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-19 14:16:49,526 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:49,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887176994] [2021-11-19 14:16:49,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887176994] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:16:49,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:16:49,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2021-11-19 14:16:49,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400688956] [2021-11-19 14:16:49,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:49,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:16:49,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:49,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:16:49,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:16:49,529 INFO L87 Difference]: Start difference. First operand 600 states and 858 transitions. Second operand has 8 states, 6 states have (on average 20.833333333333332) internal successors, (125), 8 states have internal predecessors, (125), 4 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (28), 3 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:16:49,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:49,852 INFO L93 Difference]: Finished difference Result 1144 states and 1651 transitions. [2021-11-19 14:16:49,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:16:49,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 20.833333333333332) internal successors, (125), 8 states have internal predecessors, (125), 4 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (28), 3 states have call predecessors, (28), 4 states have call successors, (28) Word has length 213 [2021-11-19 14:16:49,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:49,860 INFO L225 Difference]: With dead ends: 1144 [2021-11-19 14:16:49,860 INFO L226 Difference]: Without dead ends: 602 [2021-11-19 14:16:49,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:16:49,865 INFO L933 BasicCegarLoop]: 843 mSDtfsCounter, 363 mSDsluCounter, 4649 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 5492 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:49,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 5492 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:16:49,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-11-19 14:16:49,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 602. [2021-11-19 14:16:49,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 449 states have (on average 1.447661469933185) internal successors, (650), 460 states have internal predecessors, (650), 105 states have call successors, (105), 46 states have call predecessors, (105), 47 states have return successors, (106), 103 states have call predecessors, (106), 104 states have call successors, (106) [2021-11-19 14:16:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 861 transitions. [2021-11-19 14:16:49,923 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 861 transitions. Word has length 213 [2021-11-19 14:16:49,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:49,925 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 861 transitions. [2021-11-19 14:16:49,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 20.833333333333332) internal successors, (125), 8 states have internal predecessors, (125), 4 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (28), 3 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:16:49,925 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 861 transitions. [2021-11-19 14:16:49,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-19 14:16:49,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:49,932 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:49,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:50,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:50,157 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:50,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:50,158 INFO L85 PathProgramCache]: Analyzing trace with hash -194918896, now seen corresponding path program 1 times [2021-11-19 14:16:50,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:50,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418689805] [2021-11-19 14:16:50,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:50,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:50,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:50,160 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:50,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:16:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:50,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:16:50,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:51,036 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-19 14:16:51,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-19 14:16:51,477 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:51,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418689805] [2021-11-19 14:16:51,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418689805] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:16:51,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:16:51,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-19 14:16:51,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481949000] [2021-11-19 14:16:51,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:51,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:16:51,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:51,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:16:51,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:16:51,482 INFO L87 Difference]: Start difference. First operand 602 states and 861 transitions. Second operand has 6 states, 5 states have (on average 25.4) internal successors, (127), 6 states have internal predecessors, (127), 3 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-19 14:16:51,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:51,714 INFO L93 Difference]: Finished difference Result 1145 states and 1654 transitions. [2021-11-19 14:16:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:16:51,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 25.4) internal successors, (127), 6 states have internal predecessors, (127), 3 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 214 [2021-11-19 14:16:51,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:51,722 INFO L225 Difference]: With dead ends: 1145 [2021-11-19 14:16:51,722 INFO L226 Difference]: Without dead ends: 604 [2021-11-19 14:16:51,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:16:51,725 INFO L933 BasicCegarLoop]: 842 mSDtfsCounter, 361 mSDsluCounter, 2964 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 3806 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:51,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 3806 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:16:51,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-11-19 14:16:51,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2021-11-19 14:16:51,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 450 states have (on average 1.4466666666666668) internal successors, (651), 462 states have internal predecessors, (651), 105 states have call successors, (105), 46 states have call predecessors, (105), 48 states have return successors, (110), 103 states have call predecessors, (110), 104 states have call successors, (110) [2021-11-19 14:16:51,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 866 transitions. [2021-11-19 14:16:51,771 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 866 transitions. Word has length 214 [2021-11-19 14:16:51,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:51,772 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 866 transitions. [2021-11-19 14:16:51,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 25.4) internal successors, (127), 6 states have internal predecessors, (127), 3 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-19 14:16:51,772 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 866 transitions. [2021-11-19 14:16:51,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-19 14:16:51,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:51,778 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:51,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:51,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:51,999 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:52,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:52,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1142064353, now seen corresponding path program 1 times [2021-11-19 14:16:52,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:52,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945521919] [2021-11-19 14:16:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:52,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:52,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:52,002 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:52,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:16:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:52,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:16:52,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-19 14:16:52,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-19 14:16:53,484 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:53,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945521919] [2021-11-19 14:16:53,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945521919] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:53,485 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:53,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 14:16:53,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552860806] [2021-11-19 14:16:53,485 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:53,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:16:53,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:53,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:16:53,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:16:53,488 INFO L87 Difference]: Start difference. First operand 604 states and 866 transitions. Second operand has 12 states, 8 states have (on average 19.625) internal successors, (157), 12 states have internal predecessors, (157), 6 states have call successors, (49), 2 states have call predecessors, (49), 4 states have return successors, (40), 3 states have call predecessors, (40), 6 states have call successors, (40) [2021-11-19 14:16:53,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:53,756 INFO L93 Difference]: Finished difference Result 1133 states and 1640 transitions. [2021-11-19 14:16:53,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:16:53,757 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 19.625) internal successors, (157), 12 states have internal predecessors, (157), 6 states have call successors, (49), 2 states have call predecessors, (49), 4 states have return successors, (40), 3 states have call predecessors, (40), 6 states have call successors, (40) Word has length 208 [2021-11-19 14:16:53,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:53,762 INFO L225 Difference]: With dead ends: 1133 [2021-11-19 14:16:53,763 INFO L226 Difference]: Without dead ends: 604 [2021-11-19 14:16:53,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:16:53,766 INFO L933 BasicCegarLoop]: 843 mSDtfsCounter, 359 mSDsluCounter, 5958 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 6801 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:53,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 6801 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:16:53,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-11-19 14:16:53,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2021-11-19 14:16:53,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 450 states have (on average 1.4466666666666668) internal successors, (651), 462 states have internal predecessors, (651), 105 states have call successors, (105), 46 states have call predecessors, (105), 48 states have return successors, (109), 103 states have call predecessors, (109), 104 states have call successors, (109) [2021-11-19 14:16:53,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 865 transitions. [2021-11-19 14:16:53,811 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 865 transitions. Word has length 208 [2021-11-19 14:16:53,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:53,812 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 865 transitions. [2021-11-19 14:16:53,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 19.625) internal successors, (157), 12 states have internal predecessors, (157), 6 states have call successors, (49), 2 states have call predecessors, (49), 4 states have return successors, (40), 3 states have call predecessors, (40), 6 states have call successors, (40) [2021-11-19 14:16:53,812 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 865 transitions. [2021-11-19 14:16:53,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-19 14:16:53,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:53,818 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:53,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:54,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:54,032 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:54,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:54,033 INFO L85 PathProgramCache]: Analyzing trace with hash -515136220, now seen corresponding path program 1 times [2021-11-19 14:16:54,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:54,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489565208] [2021-11-19 14:16:54,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:54,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:54,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:54,035 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:54,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:16:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:54,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:16:54,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-19 14:16:54,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-19 14:16:55,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:55,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489565208] [2021-11-19 14:16:55,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489565208] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:55,441 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:55,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 14:16:55,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992017375] [2021-11-19 14:16:55,442 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:55,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:16:55,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:55,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:16:55,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:16:55,444 INFO L87 Difference]: Start difference. First operand 604 states and 865 transitions. Second operand has 12 states, 8 states have (on average 20.125) internal successors, (161), 12 states have internal predecessors, (161), 6 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (42), 3 states have call predecessors, (42), 6 states have call successors, (42) [2021-11-19 14:16:55,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:55,695 INFO L93 Difference]: Finished difference Result 1135 states and 1643 transitions. [2021-11-19 14:16:55,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:16:55,697 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 20.125) internal successors, (161), 12 states have internal predecessors, (161), 6 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (42), 3 states have call predecessors, (42), 6 states have call successors, (42) Word has length 216 [2021-11-19 14:16:55,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:55,702 INFO L225 Difference]: With dead ends: 1135 [2021-11-19 14:16:55,702 INFO L226 Difference]: Without dead ends: 606 [2021-11-19 14:16:55,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:16:55,705 INFO L933 BasicCegarLoop]: 844 mSDtfsCounter, 357 mSDsluCounter, 5125 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 5969 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:55,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 5969 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:16:55,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-11-19 14:16:55,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 606. [2021-11-19 14:16:55,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 451 states have (on average 1.4456762749445675) internal successors, (652), 464 states have internal predecessors, (652), 105 states have call successors, (105), 46 states have call predecessors, (105), 49 states have return successors, (111), 103 states have call predecessors, (111), 104 states have call successors, (111) [2021-11-19 14:16:55,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 868 transitions. [2021-11-19 14:16:55,745 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 868 transitions. Word has length 216 [2021-11-19 14:16:55,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:55,748 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 868 transitions. [2021-11-19 14:16:55,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 20.125) internal successors, (161), 12 states have internal predecessors, (161), 6 states have call successors, (51), 2 states have call predecessors, (51), 4 states have return successors, (42), 3 states have call predecessors, (42), 6 states have call successors, (42) [2021-11-19 14:16:55,748 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 868 transitions. [2021-11-19 14:16:55,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-19 14:16:55,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:55,754 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:55,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:55,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:55,974 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:55,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:55,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1804957748, now seen corresponding path program 1 times [2021-11-19 14:16:55,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:55,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518858260] [2021-11-19 14:16:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:55,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:55,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:55,978 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:56,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:16:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:56,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:16:56,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-19 14:16:56,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-19 14:16:57,281 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:57,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518858260] [2021-11-19 14:16:57,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518858260] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:57,282 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:57,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-19 14:16:57,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863293322] [2021-11-19 14:16:57,283 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:57,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:16:57,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:57,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:16:57,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:16:57,284 INFO L87 Difference]: Start difference. First operand 606 states and 868 transitions. Second operand has 9 states, 7 states have (on average 22.142857142857142) internal successors, (155), 9 states have internal predecessors, (155), 4 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-19 14:16:57,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:57,557 INFO L93 Difference]: Finished difference Result 1132 states and 1637 transitions. [2021-11-19 14:16:57,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:16:57,558 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 22.142857142857142) internal successors, (155), 9 states have internal predecessors, (155), 4 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) Word has length 210 [2021-11-19 14:16:57,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:57,564 INFO L225 Difference]: With dead ends: 1132 [2021-11-19 14:16:57,564 INFO L226 Difference]: Without dead ends: 606 [2021-11-19 14:16:57,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:16:57,568 INFO L933 BasicCegarLoop]: 842 mSDtfsCounter, 528 mSDsluCounter, 3622 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 4464 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:57,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 4464 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:16:57,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-11-19 14:16:57,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 606. [2021-11-19 14:16:57,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 451 states have (on average 1.4456762749445675) internal successors, (652), 464 states have internal predecessors, (652), 105 states have call successors, (105), 46 states have call predecessors, (105), 49 states have return successors, (110), 103 states have call predecessors, (110), 104 states have call successors, (110) [2021-11-19 14:16:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 867 transitions. [2021-11-19 14:16:57,615 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 867 transitions. Word has length 210 [2021-11-19 14:16:57,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:57,616 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 867 transitions. [2021-11-19 14:16:57,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 22.142857142857142) internal successors, (155), 9 states have internal predecessors, (155), 4 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (39), 4 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-19 14:16:57,616 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 867 transitions. [2021-11-19 14:16:57,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-19 14:16:57,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:57,621 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:57,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:57,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:57,835 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:57,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:57,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1541209665, now seen corresponding path program 1 times [2021-11-19 14:16:57,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:57,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445431288] [2021-11-19 14:16:57,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:57,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:57,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:57,837 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:57,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:16:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:58,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:16:58,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-19 14:16:58,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-19 14:16:59,139 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:59,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445431288] [2021-11-19 14:16:59,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445431288] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:59,139 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:59,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-19 14:16:59,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843773665] [2021-11-19 14:16:59,140 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:59,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:16:59,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:59,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:16:59,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:16:59,141 INFO L87 Difference]: Start difference. First operand 606 states and 867 transitions. Second operand has 9 states, 7 states have (on average 22.714285714285715) internal successors, (159), 9 states have internal predecessors, (159), 4 states have call successors, (50), 2 states have call predecessors, (50), 3 states have return successors, (41), 4 states have call predecessors, (41), 4 states have call successors, (41) [2021-11-19 14:16:59,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:59,423 INFO L93 Difference]: Finished difference Result 1134 states and 1642 transitions. [2021-11-19 14:16:59,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:16:59,424 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 22.714285714285715) internal successors, (159), 9 states have internal predecessors, (159), 4 states have call successors, (50), 2 states have call predecessors, (50), 3 states have return successors, (41), 4 states have call predecessors, (41), 4 states have call successors, (41) Word has length 218 [2021-11-19 14:16:59,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:59,430 INFO L225 Difference]: With dead ends: 1134 [2021-11-19 14:16:59,430 INFO L226 Difference]: Without dead ends: 608 [2021-11-19 14:16:59,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:16:59,434 INFO L933 BasicCegarLoop]: 843 mSDtfsCounter, 700 mSDsluCounter, 3809 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 4652 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:59,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 4652 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:16:59,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-11-19 14:16:59,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 608. [2021-11-19 14:16:59,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 452 states have (on average 1.4446902654867257) internal successors, (653), 466 states have internal predecessors, (653), 105 states have call successors, (105), 46 states have call predecessors, (105), 50 states have return successors, (114), 103 states have call predecessors, (114), 104 states have call successors, (114) [2021-11-19 14:16:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 872 transitions. [2021-11-19 14:16:59,482 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 872 transitions. Word has length 218 [2021-11-19 14:16:59,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:59,482 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 872 transitions. [2021-11-19 14:16:59,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 22.714285714285715) internal successors, (159), 9 states have internal predecessors, (159), 4 states have call successors, (50), 2 states have call predecessors, (50), 3 states have return successors, (41), 4 states have call predecessors, (41), 4 states have call successors, (41) [2021-11-19 14:16:59,483 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 872 transitions. [2021-11-19 14:16:59,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-19 14:16:59,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:59,489 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:59,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:59,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:59,709 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:59,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:59,710 INFO L85 PathProgramCache]: Analyzing trace with hash 220200831, now seen corresponding path program 1 times [2021-11-19 14:16:59,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:59,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615860152] [2021-11-19 14:16:59,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:59,711 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:59,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:59,712 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:59,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:17:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:00,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:17:00,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 14:17:00,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 14:17:00,831 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:00,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615860152] [2021-11-19 14:17:00,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615860152] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:00,831 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:00,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:17:00,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533036942] [2021-11-19 14:17:00,832 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:00,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:17:00,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:00,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:17:00,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:17:00,836 INFO L87 Difference]: Start difference. First operand 608 states and 872 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-19 14:17:00,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:00,984 INFO L93 Difference]: Finished difference Result 1066 states and 1537 transitions. [2021-11-19 14:17:00,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:17:00,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 212 [2021-11-19 14:17:00,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:00,993 INFO L225 Difference]: With dead ends: 1066 [2021-11-19 14:17:00,993 INFO L226 Difference]: Without dead ends: 737 [2021-11-19 14:17:00,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:17:00,996 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 169 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1891 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:00,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 1891 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:17:00,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-11-19 14:17:01,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 729. [2021-11-19 14:17:01,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 556 states have (on average 1.4712230215827338) internal successors, (818), 570 states have internal predecessors, (818), 122 states have call successors, (122), 46 states have call predecessors, (122), 50 states have return successors, (133), 120 states have call predecessors, (133), 121 states have call successors, (133) [2021-11-19 14:17:01,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1073 transitions. [2021-11-19 14:17:01,058 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1073 transitions. Word has length 212 [2021-11-19 14:17:01,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:01,059 INFO L470 AbstractCegarLoop]: Abstraction has 729 states and 1073 transitions. [2021-11-19 14:17:01,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-19 14:17:01,060 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1073 transitions. [2021-11-19 14:17:01,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-19 14:17:01,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:01,096 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:01,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:01,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:01,320 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:01,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:01,320 INFO L85 PathProgramCache]: Analyzing trace with hash 323557407, now seen corresponding path program 1 times [2021-11-19 14:17:01,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:01,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529431806] [2021-11-19 14:17:01,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:01,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:01,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:01,323 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:01,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:17:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:01,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:17:01,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 14:17:02,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 14:17:02,552 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:02,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529431806] [2021-11-19 14:17:02,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529431806] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:02,553 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:02,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:17:02,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474727584] [2021-11-19 14:17:02,554 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:02,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:17:02,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:02,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:17:02,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:02,556 INFO L87 Difference]: Start difference. First operand 729 states and 1073 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-19 14:17:02,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:02,622 INFO L93 Difference]: Finished difference Result 1442 states and 2147 transitions. [2021-11-19 14:17:02,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:17:02,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 231 [2021-11-19 14:17:02,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:02,631 INFO L225 Difference]: With dead ends: 1442 [2021-11-19 14:17:02,631 INFO L226 Difference]: Without dead ends: 829 [2021-11-19 14:17:02,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:02,635 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 165 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:02,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 1685 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:17:02,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-11-19 14:17:02,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 821. [2021-11-19 14:17:02,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 634 states have (on average 1.4779179810725551) internal successors, (937), 648 states have internal predecessors, (937), 136 states have call successors, (136), 46 states have call predecessors, (136), 50 states have return successors, (149), 134 states have call predecessors, (149), 135 states have call successors, (149) [2021-11-19 14:17:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1222 transitions. [2021-11-19 14:17:02,739 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1222 transitions. Word has length 231 [2021-11-19 14:17:02,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:02,740 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1222 transitions. [2021-11-19 14:17:02,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-19 14:17:02,741 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1222 transitions. [2021-11-19 14:17:02,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-19 14:17:02,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:02,750 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:02,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:02,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:02,969 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:02,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:02,969 INFO L85 PathProgramCache]: Analyzing trace with hash 972774816, now seen corresponding path program 1 times [2021-11-19 14:17:02,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:02,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248428458] [2021-11-19 14:17:02,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:02,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:02,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:02,972 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:02,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:17:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:03,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:17:03,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 14:17:03,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 14:17:04,227 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:04,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248428458] [2021-11-19 14:17:04,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248428458] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:04,227 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:04,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:17:04,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645449762] [2021-11-19 14:17:04,228 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:04,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:17:04,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:04,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:17:04,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:04,230 INFO L87 Difference]: Start difference. First operand 821 states and 1222 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-19 14:17:04,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:04,324 INFO L93 Difference]: Finished difference Result 1718 states and 2602 transitions. [2021-11-19 14:17:04,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:17:04,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 232 [2021-11-19 14:17:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:04,341 INFO L225 Difference]: With dead ends: 1718 [2021-11-19 14:17:04,341 INFO L226 Difference]: Without dead ends: 1024 [2021-11-19 14:17:04,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:04,348 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 163 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:04,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1726 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:17:04,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-11-19 14:17:04,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1016. [2021-11-19 14:17:04,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 798 states have (on average 1.493734335839599) internal successors, (1192), 812 states have internal predecessors, (1192), 167 states have call successors, (167), 46 states have call predecessors, (167), 50 states have return successors, (184), 165 states have call predecessors, (184), 166 states have call successors, (184) [2021-11-19 14:17:04,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1543 transitions. [2021-11-19 14:17:04,459 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1543 transitions. Word has length 232 [2021-11-19 14:17:04,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:04,460 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 1543 transitions. [2021-11-19 14:17:04,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-19 14:17:04,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1543 transitions. [2021-11-19 14:17:04,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-19 14:17:04,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:04,468 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:04,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:04,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:04,689 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:04,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:04,689 INFO L85 PathProgramCache]: Analyzing trace with hash 2134626805, now seen corresponding path program 1 times [2021-11-19 14:17:04,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:04,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299739297] [2021-11-19 14:17:04,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:04,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:04,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:04,692 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:04,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:17:05,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:05,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:17:05,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 14:17:05,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 14:17:05,902 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:05,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299739297] [2021-11-19 14:17:05,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299739297] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:05,903 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:05,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:17:05,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369785704] [2021-11-19 14:17:05,904 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:05,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:17:05,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:05,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:17:05,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:05,907 INFO L87 Difference]: Start difference. First operand 1016 states and 1543 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-19 14:17:06,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:06,025 INFO L93 Difference]: Finished difference Result 2289 states and 3542 transitions. [2021-11-19 14:17:06,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:17:06,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 233 [2021-11-19 14:17:06,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:06,039 INFO L225 Difference]: With dead ends: 2289 [2021-11-19 14:17:06,039 INFO L226 Difference]: Without dead ends: 1408 [2021-11-19 14:17:06,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:06,044 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 161 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:06,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 1717 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:17:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-11-19 14:17:06,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1400. [2021-11-19 14:17:06,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1124 states have (on average 1.5169039145907472) internal successors, (1705), 1138 states have internal predecessors, (1705), 225 states have call successors, (225), 46 states have call predecessors, (225), 50 states have return successors, (242), 223 states have call predecessors, (242), 224 states have call successors, (242) [2021-11-19 14:17:06,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 2172 transitions. [2021-11-19 14:17:06,167 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 2172 transitions. Word has length 233 [2021-11-19 14:17:06,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:06,168 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 2172 transitions. [2021-11-19 14:17:06,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-19 14:17:06,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 2172 transitions. [2021-11-19 14:17:06,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-19 14:17:06,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:06,178 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:06,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:06,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:06,392 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:06,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:06,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1070915453, now seen corresponding path program 1 times [2021-11-19 14:17:06,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:06,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304545262] [2021-11-19 14:17:06,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:06,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:06,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:06,394 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:06,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:17:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:06,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:17:06,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 14:17:07,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 14:17:07,589 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:07,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304545262] [2021-11-19 14:17:07,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304545262] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:07,589 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:07,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:17:07,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477097502] [2021-11-19 14:17:07,590 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:07,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:17:07,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:07,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:17:07,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:07,592 INFO L87 Difference]: Start difference. First operand 1400 states and 2172 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-19 14:17:07,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:07,746 INFO L93 Difference]: Finished difference Result 3384 states and 5353 transitions. [2021-11-19 14:17:07,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:17:07,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 227 [2021-11-19 14:17:07,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:07,767 INFO L225 Difference]: With dead ends: 3384 [2021-11-19 14:17:07,767 INFO L226 Difference]: Without dead ends: 2130 [2021-11-19 14:17:07,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:07,775 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 159 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1710 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:07,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 1710 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:17:07,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2021-11-19 14:17:08,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 2122. [2021-11-19 14:17:08,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 1750 states have (on average 1.5417142857142858) internal successors, (2698), 1764 states have internal predecessors, (2698), 321 states have call successors, (321), 46 states have call predecessors, (321), 50 states have return successors, (346), 319 states have call predecessors, (346), 320 states have call successors, (346) [2021-11-19 14:17:08,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 3365 transitions. [2021-11-19 14:17:08,059 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 3365 transitions. Word has length 227 [2021-11-19 14:17:08,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:08,060 INFO L470 AbstractCegarLoop]: Abstraction has 2122 states and 3365 transitions. [2021-11-19 14:17:08,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-19 14:17:08,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 3365 transitions. [2021-11-19 14:17:08,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-19 14:17:08,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:08,079 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:08,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:08,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:08,303 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:08,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:08,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1261397777, now seen corresponding path program 1 times [2021-11-19 14:17:08,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:08,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118086277] [2021-11-19 14:17:08,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:08,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:08,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:08,305 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:08,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:17:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:08,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:17:08,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 14:17:08,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 14:17:09,476 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:09,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118086277] [2021-11-19 14:17:09,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118086277] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:09,477 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:09,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:17:09,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909998742] [2021-11-19 14:17:09,477 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:09,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:17:09,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:09,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:17:09,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:09,479 INFO L87 Difference]: Start difference. First operand 2122 states and 3365 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-19 14:17:09,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:09,729 INFO L93 Difference]: Finished difference Result 5473 states and 8820 transitions. [2021-11-19 14:17:09,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:17:09,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 228 [2021-11-19 14:17:09,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:09,764 INFO L225 Difference]: With dead ends: 5473 [2021-11-19 14:17:09,765 INFO L226 Difference]: Without dead ends: 3508 [2021-11-19 14:17:09,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:09,775 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 157 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1710 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:09,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 1710 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:17:09,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3508 states. [2021-11-19 14:17:10,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3508 to 3500. [2021-11-19 14:17:10,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3500 states, 2960 states have (on average 1.5631756756756756) internal successors, (4627), 2974 states have internal predecessors, (4627), 489 states have call successors, (489), 46 states have call predecessors, (489), 50 states have return successors, (530), 487 states have call predecessors, (530), 488 states have call successors, (530) [2021-11-19 14:17:10,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3500 states to 3500 states and 5646 transitions. [2021-11-19 14:17:10,086 INFO L78 Accepts]: Start accepts. Automaton has 3500 states and 5646 transitions. Word has length 228 [2021-11-19 14:17:10,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:10,087 INFO L470 AbstractCegarLoop]: Abstraction has 3500 states and 5646 transitions. [2021-11-19 14:17:10,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-19 14:17:10,088 INFO L276 IsEmpty]: Start isEmpty. Operand 3500 states and 5646 transitions. [2021-11-19 14:17:10,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-19 14:17:10,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:10,108 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:10,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:10,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:10,323 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:10,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:10,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1721161890, now seen corresponding path program 1 times [2021-11-19 14:17:10,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:10,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580349363] [2021-11-19 14:17:10,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:10,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:10,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:10,327 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:10,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:17:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:10,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:17:10,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 14:17:11,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 14:17:11,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:11,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580349363] [2021-11-19 14:17:11,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580349363] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:11,629 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:11,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:17:11,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449029928] [2021-11-19 14:17:11,630 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:11,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:17:11,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:11,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:17:11,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:11,632 INFO L87 Difference]: Start difference. First operand 3500 states and 5646 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-19 14:17:12,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:12,066 INFO L93 Difference]: Finished difference Result 9466 states and 15422 transitions. [2021-11-19 14:17:12,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:17:12,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 229 [2021-11-19 14:17:12,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:12,128 INFO L225 Difference]: With dead ends: 9466 [2021-11-19 14:17:12,128 INFO L226 Difference]: Without dead ends: 6134 [2021-11-19 14:17:12,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:12,143 INFO L933 BasicCegarLoop]: 882 mSDtfsCounter, 155 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1723 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:12,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 1723 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:17:12,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6134 states. [2021-11-19 14:17:12,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6134 to 6126. [2021-11-19 14:17:12,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6126 states, 5202 states have (on average 1.566320645905421) internal successors, (8148), 5216 states have internal predecessors, (8148), 873 states have call successors, (873), 46 states have call predecessors, (873), 50 states have return successors, (946), 871 states have call predecessors, (946), 872 states have call successors, (946) [2021-11-19 14:17:12,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6126 states to 6126 states and 9967 transitions. [2021-11-19 14:17:12,659 INFO L78 Accepts]: Start accepts. Automaton has 6126 states and 9967 transitions. Word has length 229 [2021-11-19 14:17:12,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:12,660 INFO L470 AbstractCegarLoop]: Abstraction has 6126 states and 9967 transitions. [2021-11-19 14:17:12,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-19 14:17:12,661 INFO L276 IsEmpty]: Start isEmpty. Operand 6126 states and 9967 transitions. [2021-11-19 14:17:12,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-19 14:17:12,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:12,692 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:12,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:12,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:12,914 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:12,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:12,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1052419322, now seen corresponding path program 1 times [2021-11-19 14:17:12,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:12,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284247551] [2021-11-19 14:17:12,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:12,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:12,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:12,917 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:12,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:17:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:13,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:17:13,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 14:17:13,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 14:17:14,109 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:14,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284247551] [2021-11-19 14:17:14,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284247551] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:14,109 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:14,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:17:14,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659215778] [2021-11-19 14:17:14,110 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:14,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:17:14,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:14,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:17:14,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:14,112 INFO L87 Difference]: Start difference. First operand 6126 states and 9967 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-19 14:17:14,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:14,715 INFO L93 Difference]: Finished difference Result 17270 states and 28342 transitions. [2021-11-19 14:17:14,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:17:14,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 230 [2021-11-19 14:17:14,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:14,786 INFO L225 Difference]: With dead ends: 17270 [2021-11-19 14:17:14,786 INFO L226 Difference]: Without dead ends: 11320 [2021-11-19 14:17:14,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:14,813 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 153 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:14,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 1717 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:17:14,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11320 states. [2021-11-19 14:17:15,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11320 to 11312. [2021-11-19 14:17:15,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11312 states, 9684 states have (on average 1.5750722841800908) internal successors, (15253), 9698 states have internal predecessors, (15253), 1577 states have call successors, (1577), 46 states have call predecessors, (1577), 50 states have return successors, (1714), 1575 states have call predecessors, (1714), 1576 states have call successors, (1714) [2021-11-19 14:17:15,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11312 states to 11312 states and 18544 transitions. [2021-11-19 14:17:15,802 INFO L78 Accepts]: Start accepts. Automaton has 11312 states and 18544 transitions. Word has length 230 [2021-11-19 14:17:15,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:15,802 INFO L470 AbstractCegarLoop]: Abstraction has 11312 states and 18544 transitions. [2021-11-19 14:17:15,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-19 14:17:15,803 INFO L276 IsEmpty]: Start isEmpty. Operand 11312 states and 18544 transitions. [2021-11-19 14:17:15,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-19 14:17:15,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:15,850 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, 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, 1, 1] [2021-11-19 14:17:15,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:16,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:16,083 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:16,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:16,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1576689917, now seen corresponding path program 1 times [2021-11-19 14:17:16,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:16,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118817870] [2021-11-19 14:17:16,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:16,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:16,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:16,086 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:16,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:17:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:16,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:17:16,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 14:17:16,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 14:17:17,230 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:17,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118817870] [2021-11-19 14:17:17,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118817870] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:17,230 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:17,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:17:17,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19745831] [2021-11-19 14:17:17,230 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:17,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:17:17,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:17,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:17:17,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:17:17,232 INFO L87 Difference]: Start difference. First operand 11312 states and 18544 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-19 14:17:18,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:18,027 INFO L93 Difference]: Finished difference Result 22414 states and 36786 transitions. [2021-11-19 14:17:18,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:17:18,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 237 [2021-11-19 14:17:18,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:18,083 INFO L225 Difference]: With dead ends: 22414 [2021-11-19 14:17:18,083 INFO L226 Difference]: Without dead ends: 11320 [2021-11-19 14:17:18,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:17:18,122 INFO L933 BasicCegarLoop]: 1028 mSDtfsCounter, 302 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:18,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 1894 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:17:18,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11320 states. [2021-11-19 14:17:19,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11320 to 11312. [2021-11-19 14:17:19,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11312 states, 9684 states have (on average 1.568463444857497) internal successors, (15189), 9698 states have internal predecessors, (15189), 1577 states have call successors, (1577), 46 states have call predecessors, (1577), 50 states have return successors, (1714), 1575 states have call predecessors, (1714), 1576 states have call successors, (1714) [2021-11-19 14:17:19,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11312 states to 11312 states and 18480 transitions. [2021-11-19 14:17:19,264 INFO L78 Accepts]: Start accepts. Automaton has 11312 states and 18480 transitions. Word has length 237 [2021-11-19 14:17:19,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:19,265 INFO L470 AbstractCegarLoop]: Abstraction has 11312 states and 18480 transitions. [2021-11-19 14:17:19,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-19 14:17:19,265 INFO L276 IsEmpty]: Start isEmpty. Operand 11312 states and 18480 transitions. [2021-11-19 14:17:19,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-19 14:17:19,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:19,301 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:19,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:19,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:19,523 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:19,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:19,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2016354653, now seen corresponding path program 1 times [2021-11-19 14:17:19,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:19,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812083408] [2021-11-19 14:17:19,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:19,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:19,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:19,527 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:19,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:17:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:20,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:17:20,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 14:17:20,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:20,909 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 14:17:20,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:20,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812083408] [2021-11-19 14:17:20,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812083408] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:20,910 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:20,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:17:20,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737306770] [2021-11-19 14:17:20,910 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:20,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:17:20,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:20,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:17:20,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:20,912 INFO L87 Difference]: Start difference. First operand 11312 states and 18480 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-19 14:17:21,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:21,810 INFO L93 Difference]: Finished difference Result 30434 states and 49423 transitions. [2021-11-19 14:17:21,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:17:21,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 238 [2021-11-19 14:17:21,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:21,903 INFO L225 Difference]: With dead ends: 30434 [2021-11-19 14:17:21,903 INFO L226 Difference]: Without dead ends: 19322 [2021-11-19 14:17:21,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:21,936 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 151 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1696 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:21,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 1696 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:17:21,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19322 states. [2021-11-19 14:17:23,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19322 to 19314. [2021-11-19 14:17:23,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19314 states, 16598 states have (on average 1.5359681889384262) internal successors, (25494), 16612 states have internal predecessors, (25494), 2665 states have call successors, (2665), 46 states have call predecessors, (2665), 50 states have return successors, (2930), 2663 states have call predecessors, (2930), 2664 states have call successors, (2930) [2021-11-19 14:17:23,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19314 states to 19314 states and 31089 transitions. [2021-11-19 14:17:23,791 INFO L78 Accepts]: Start accepts. Automaton has 19314 states and 31089 transitions. Word has length 238 [2021-11-19 14:17:23,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:23,792 INFO L470 AbstractCegarLoop]: Abstraction has 19314 states and 31089 transitions. [2021-11-19 14:17:23,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-19 14:17:23,792 INFO L276 IsEmpty]: Start isEmpty. Operand 19314 states and 31089 transitions. [2021-11-19 14:17:23,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-19 14:17:23,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:23,841 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:23,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:24,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:24,054 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:24,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:24,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1684975386, now seen corresponding path program 1 times [2021-11-19 14:17:24,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:24,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629772904] [2021-11-19 14:17:24,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:24,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:24,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:24,059 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:24,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:17:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:24,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:17:24,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 14:17:25,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 14:17:25,475 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:25,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629772904] [2021-11-19 14:17:25,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629772904] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:25,475 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:25,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:17:25,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541984014] [2021-11-19 14:17:25,476 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:25,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:17:25,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:25,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:17:25,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:25,478 INFO L87 Difference]: Start difference. First operand 19314 states and 31089 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-19 14:17:27,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:27,420 INFO L93 Difference]: Finished difference Result 56095 states and 90568 transitions. [2021-11-19 14:17:27,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:17:27,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 239 [2021-11-19 14:17:27,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:27,570 INFO L225 Difference]: With dead ends: 56095 [2021-11-19 14:17:27,570 INFO L226 Difference]: Without dead ends: 36988 [2021-11-19 14:17:27,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:27,619 INFO L933 BasicCegarLoop]: 870 mSDtfsCounter, 149 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1716 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:27,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 1716 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:17:27,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36988 states. [2021-11-19 14:17:30,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36988 to 36980. [2021-11-19 14:17:31,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36980 states, 31960 states have (on average 1.5346370463078849) internal successors, (49047), 31974 states have internal predecessors, (49047), 4969 states have call successors, (4969), 46 states have call predecessors, (4969), 50 states have return successors, (5490), 4967 states have call predecessors, (5490), 4968 states have call successors, (5490) [2021-11-19 14:17:31,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36980 states to 36980 states and 59506 transitions. [2021-11-19 14:17:31,138 INFO L78 Accepts]: Start accepts. Automaton has 36980 states and 59506 transitions. Word has length 239 [2021-11-19 14:17:31,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:31,139 INFO L470 AbstractCegarLoop]: Abstraction has 36980 states and 59506 transitions. [2021-11-19 14:17:31,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-19 14:17:31,139 INFO L276 IsEmpty]: Start isEmpty. Operand 36980 states and 59506 transitions. [2021-11-19 14:17:31,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-19 14:17:31,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:31,201 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:31,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:31,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:31,422 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:31,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:31,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1639454020, now seen corresponding path program 1 times [2021-11-19 14:17:31,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:31,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300248105] [2021-11-19 14:17:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:31,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:31,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:31,425 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:31,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:17:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:31,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:17:31,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 14:17:32,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 14:17:32,612 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:32,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300248105] [2021-11-19 14:17:32,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300248105] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:32,613 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:32,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:17:32,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054443759] [2021-11-19 14:17:32,613 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:32,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:17:32,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:32,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:17:32,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:32,615 INFO L87 Difference]: Start difference. First operand 36980 states and 59506 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-19 14:17:36,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:36,660 INFO L93 Difference]: Finished difference Result 107547 states and 173760 transitions. [2021-11-19 14:17:36,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:17:36,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 240 [2021-11-19 14:17:36,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:36,952 INFO L225 Difference]: With dead ends: 107547 [2021-11-19 14:17:36,952 INFO L226 Difference]: Without dead ends: 70782 [2021-11-19 14:17:37,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:37,042 INFO L933 BasicCegarLoop]: 870 mSDtfsCounter, 147 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1715 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:37,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 1715 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:17:37,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70782 states. [2021-11-19 14:17:42,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70782 to 70774. [2021-11-19 14:17:42,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70774 states, 61402 states have (on average 1.5367577603335396) internal successors, (94360), 61416 states have internal predecessors, (94360), 9321 states have call successors, (9321), 46 states have call predecessors, (9321), 50 states have return successors, (10354), 9319 states have call predecessors, (10354), 9320 states have call successors, (10354) [2021-11-19 14:17:42,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70774 states to 70774 states and 114035 transitions. [2021-11-19 14:17:42,387 INFO L78 Accepts]: Start accepts. Automaton has 70774 states and 114035 transitions. Word has length 240 [2021-11-19 14:17:42,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:42,387 INFO L470 AbstractCegarLoop]: Abstraction has 70774 states and 114035 transitions. [2021-11-19 14:17:42,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-19 14:17:42,388 INFO L276 IsEmpty]: Start isEmpty. Operand 70774 states and 114035 transitions. [2021-11-19 14:17:42,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-19 14:17:42,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:42,451 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:42,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-19 14:17:42,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:42,671 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:42,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:42,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2132389708, now seen corresponding path program 1 times [2021-11-19 14:17:42,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:42,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143062523] [2021-11-19 14:17:42,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:42,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:42,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:42,674 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:42,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b35299f9-dc31-440a-9603-d4a2c16109ce/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:17:43,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:43,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:17:43,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 14:17:43,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 14:17:44,177 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:44,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143062523] [2021-11-19 14:17:44,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2143062523] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:44,177 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:44,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:17:44,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950123303] [2021-11-19 14:17:44,178 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:44,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:17:44,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:44,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:17:44,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:44,180 INFO L87 Difference]: Start difference. First operand 70774 states and 114035 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39)