./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 09d600be73ca435c113b9c0e8e087d96a910d62ea2126c235d6963c00b3a91c2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:54:25,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:54:25,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:54:25,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:54:25,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:54:25,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:54:25,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:54:25,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:54:25,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:54:25,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:54:25,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:54:25,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:54:25,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:54:25,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:54:25,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:54:25,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:54:25,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:54:25,774 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:54:25,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:54:25,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:54:25,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:54:25,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:54:25,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:54:25,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:54:25,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:54:25,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:54:25,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:54:25,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:54:25,792 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:54:25,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:54:25,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:54:25,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:54:25,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:54:25,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:54:25,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:54:25,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:54:25,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:54:25,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:54:25,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:54:25,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:54:25,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:54:25,802 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:54:25,828 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:54:25,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:54:25,830 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:54:25,830 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:54:25,830 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:54:25,830 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:54:25,830 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:54:25,831 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:54:25,831 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:54:25,831 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:54:25,831 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:54:25,831 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:54:25,831 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:54:25,832 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:54:25,832 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:54:25,832 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:54:25,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:54:25,833 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:54:25,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:54:25,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:54:25,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:54:25,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:54:25,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:54:25,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:54:25,834 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:54:25,834 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:54:25,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:54:25,835 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:54:25,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:54:25,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:54:25,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:54:25,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:54:25,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:54:25,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:54:25,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:54:25,836 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:54:25,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:54:25,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:54:25,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:54:25,837 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:54:25,837 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_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09d600be73ca435c113b9c0e8e087d96a910d62ea2126c235d6963c00b3a91c2 [2021-11-12 22:54:26,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:54:26,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:54:26,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:54:26,136 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:54:26,142 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:54:26,143 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c [2021-11-12 22:54:26,226 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/data/e41d94c5a/7535327d5c9d4e278327af5acc98e32d/FLAGc575e9c30 [2021-11-12 22:54:26,850 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:54:26,856 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c [2021-11-12 22:54:26,884 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/data/e41d94c5a/7535327d5c9d4e278327af5acc98e32d/FLAGc575e9c30 [2021-11-12 22:54:27,065 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/data/e41d94c5a/7535327d5c9d4e278327af5acc98e32d [2021-11-12 22:54:27,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:54:27,069 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:54:27,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:54:27,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:54:27,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:54:27,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:54:27" (1/1) ... [2021-11-12 22:54:27,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27df89f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:27, skipping insertion in model container [2021-11-12 22:54:27,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:54:27" (1/1) ... [2021-11-12 22:54:27,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:54:27,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:54:27,583 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c[27470,27483] [2021-11-12 22:54:27,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:54:27,888 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:54:27,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@40f52c54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:27, skipping insertion in model container [2021-11-12 22:54:27,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:54:27,890 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:54:27,892 INFO L158 Benchmark]: Toolchain (without parser) took 821.66ms. Allocated memory is still 111.1MB. Free memory was 69.9MB in the beginning and 70.0MB in the end (delta: -114.0kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 22:54:27,893 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 111.1MB. Free memory is still 88.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:54:27,895 INFO L158 Benchmark]: CACSL2BoogieTranslator took 807.02ms. Allocated memory is still 111.1MB. Free memory was 69.7MB in the beginning and 70.0MB in the end (delta: -338.2kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 22:54:27,898 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 111.1MB. Free memory is still 88.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 807.02ms. Allocated memory is still 111.1MB. Free memory was 69.7MB in the beginning and 70.0MB in the end (delta: -338.2kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 750]: 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_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 09d600be73ca435c113b9c0e8e087d96a910d62ea2126c235d6963c00b3a91c2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:54:30,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:54:30,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:54:30,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:54:30,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:54:30,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:54:30,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:54:30,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:54:30,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:54:30,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:54:30,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:54:30,275 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:54:30,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:54:30,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:54:30,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:54:30,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:54:30,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:54:30,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:54:30,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:54:30,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:54:30,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:54:30,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:54:30,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:54:30,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:54:30,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:54:30,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:54:30,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:54:30,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:54:30,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:54:30,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:54:30,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:54:30,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:54:30,324 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:54:30,325 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:54:30,327 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:54:30,327 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:54:30,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:54:30,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:54:30,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:54:30,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:54:30,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:54:30,358 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:54:30,399 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:54:30,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:54:30,401 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:54:30,401 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:54:30,402 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:54:30,402 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:54:30,402 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:54:30,403 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:54:30,403 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:54:30,403 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:54:30,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:54:30,406 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:54:30,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:54:30,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:54:30,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:54:30,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:54:30,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:54:30,407 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:54:30,408 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:54:30,408 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:54:30,408 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:54:30,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:54:30,409 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:54:30,409 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:54:30,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:54:30,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:54:30,410 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:54:30,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:54:30,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:54:30,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:54:30,411 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:54:30,411 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:54:30,411 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:30,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:54:30,412 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:54:30,413 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:54:30,413 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_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09d600be73ca435c113b9c0e8e087d96a910d62ea2126c235d6963c00b3a91c2 [2021-11-12 22:54:30,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:54:30,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:54:30,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:54:30,851 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:54:30,852 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:54:30,854 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c [2021-11-12 22:54:30,946 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/data/2524e5f01/69b1cbb7a01341a3b7d7d7516b67db73/FLAGff07dee37 [2021-11-12 22:54:31,653 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:54:31,654 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c [2021-11-12 22:54:31,676 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/data/2524e5f01/69b1cbb7a01341a3b7d7d7516b67db73/FLAGff07dee37 [2021-11-12 22:54:31,843 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/data/2524e5f01/69b1cbb7a01341a3b7d7d7516b67db73 [2021-11-12 22:54:31,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:54:31,849 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:54:31,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:54:31,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:54:31,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:54:31,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:54:31" (1/1) ... [2021-11-12 22:54:31,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@748f2e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:31, skipping insertion in model container [2021-11-12 22:54:31,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:54:31" (1/1) ... [2021-11-12 22:54:31,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:54:31,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:54:32,418 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c[27470,27483] [2021-11-12 22:54:32,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:54:32,651 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:54:32,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:54:32,764 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c[27470,27483] [2021-11-12 22:54:32,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:54:32,851 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:54:32,893 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c[27470,27483] [2021-11-12 22:54:32,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:54:33,029 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:54:33,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:33 WrapperNode [2021-11-12 22:54:33,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:54:33,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:54:33,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:54:33,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:54:33,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:33" (1/1) ... [2021-11-12 22:54:33,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:33" (1/1) ... [2021-11-12 22:54:33,159 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:54:33,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:54:33,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:54:33,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:54:33,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:33" (1/1) ... [2021-11-12 22:54:33,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:33" (1/1) ... [2021-11-12 22:54:33,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:33" (1/1) ... [2021-11-12 22:54:33,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:33" (1/1) ... [2021-11-12 22:54:33,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:33" (1/1) ... [2021-11-12 22:54:33,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:33" (1/1) ... [2021-11-12 22:54:33,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:33" (1/1) ... [2021-11-12 22:54:33,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:54:33,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:54:33,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:54:33,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:54:33,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:33" (1/1) ... [2021-11-12 22:54:33,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:54:33,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:54:33,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:54:33,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:54:33,388 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-12 22:54:33,389 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-12 22:54:33,390 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 22:54:33,390 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 22:54:33,390 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 22:54:33,390 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 22:54:33,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:54:33,391 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 22:54:33,391 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 22:54:33,391 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 22:54:33,391 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 22:54:33,391 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 22:54:33,391 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 22:54:33,392 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 22:54:33,392 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 22:54:33,392 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 22:54:33,392 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 22:54:33,392 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 22:54:33,392 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 22:54:33,392 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 22:54:33,393 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 22:54:33,393 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 22:54:33,393 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 22:54:33,393 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 22:54:33,393 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 22:54:33,393 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 22:54:33,393 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 22:54:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:54:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 22:54:33,394 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 22:54:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 22:54:33,395 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 22:54:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 22:54:33,395 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 22:54:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 22:54:33,395 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 22:54:33,396 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 22:54:33,396 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 22:54:33,396 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 22:54:33,396 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 22:54:33,396 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 22:54:33,396 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 22:54:33,397 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 22:54:33,397 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 22:54:33,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:54:33,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:54:33,397 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 22:54:33,397 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 22:54:37,216 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:54:37,217 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:54:37,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:54:37 BoogieIcfgContainer [2021-11-12 22:54:37,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:54:37,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:54:37,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:54:37,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:54:37,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:54:31" (1/3) ... [2021-11-12 22:54:37,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e833f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:54:37, skipping insertion in model container [2021-11-12 22:54:37,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:54:33" (2/3) ... [2021-11-12 22:54:37,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e833f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:54:37, skipping insertion in model container [2021-11-12 22:54:37,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:54:37" (3/3) ... [2021-11-12 22:54:37,231 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product17.cil.c [2021-11-12 22:54:37,237 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:54:37,237 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:54:37,308 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:54:37,322 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:54:37,322 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:54:37,367 INFO L276 IsEmpty]: Start isEmpty. Operand has 539 states, 424 states have (on average 1.705188679245283) internal successors, (723), 445 states have internal predecessors, (723), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-12 22:54:37,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 22:54:37,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:37,396 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:54:37,397 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:37,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:37,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1594208609, now seen corresponding path program 1 times [2021-11-12 22:54:37,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:37,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [968241928] [2021-11-12 22:54:37,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:37,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:37,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:37,424 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:37,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:54:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:38,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:54:38,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 22:54:38,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:38,621 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 22:54:38,622 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:38,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [968241928] [2021-11-12 22:54:38,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [968241928] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:38,624 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:38,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:54:38,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309055499] [2021-11-12 22:54:38,626 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:38,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:54:38,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:38,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:54:38,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:54:38,672 INFO L87 Difference]: Start difference. First operand has 539 states, 424 states have (on average 1.705188679245283) internal successors, (723), 445 states have internal predecessors, (723), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-12 22:54:38,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:38,782 INFO L93 Difference]: Finished difference Result 560 states and 935 transitions. [2021-11-12 22:54:38,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:54:38,784 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 97 [2021-11-12 22:54:38,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:38,811 INFO L225 Difference]: With dead ends: 560 [2021-11-12 22:54:38,811 INFO L226 Difference]: Without dead ends: 531 [2021-11-12 22:54:38,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:54:38,820 INFO L933 BasicCegarLoop]: 896 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.16ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:38,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 10.16ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:54:38,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-12 22:54:38,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-12 22:54:38,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 418 states have (on average 1.7033492822966507) internal successors, (712), 437 states have internal predecessors, (712), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:54:38,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 889 transitions. [2021-11-12 22:54:38,924 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 889 transitions. Word has length 97 [2021-11-12 22:54:38,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:38,926 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 889 transitions. [2021-11-12 22:54:38,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-12 22:54:38,927 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 889 transitions. [2021-11-12 22:54:38,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-12 22:54:38,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:38,934 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:54:38,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:39,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:39,150 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:39,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:39,151 INFO L85 PathProgramCache]: Analyzing trace with hash -365707531, now seen corresponding path program 1 times [2021-11-12 22:54:39,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:39,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587777916] [2021-11-12 22:54:39,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:39,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:39,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:39,154 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:39,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:54:39,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:39,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:54:39,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:54:40,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:54:40,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:40,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587777916] [2021-11-12 22:54:40,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587777916] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:54:40,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:54:40,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:54:40,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582230886] [2021-11-12 22:54:40,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:40,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:54:40,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:40,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:54:40,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:54:40,324 INFO L87 Difference]: Start difference. First operand 531 states and 889 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:40,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:40,461 INFO L93 Difference]: Finished difference Result 1053 states and 1770 transitions. [2021-11-12 22:54:40,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:54:40,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 99 [2021-11-12 22:54:40,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:40,469 INFO L225 Difference]: With dead ends: 1053 [2021-11-12 22:54:40,469 INFO L226 Difference]: Without dead ends: 531 [2021-11-12 22:54:40,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:54:40,479 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 14 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.73ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.84ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:40,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2618 Invalid, 35 Unknown, 0 Unchecked, 16.73ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 37.84ms Time] [2021-11-12 22:54:40,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-12 22:54:40,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-12 22:54:40,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 418 states have (on average 1.700956937799043) internal successors, (711), 437 states have internal predecessors, (711), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:54:40,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 888 transitions. [2021-11-12 22:54:40,542 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 888 transitions. Word has length 99 [2021-11-12 22:54:40,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:40,544 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 888 transitions. [2021-11-12 22:54:40,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:40,545 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 888 transitions. [2021-11-12 22:54:40,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-12 22:54:40,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:40,553 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:54:40,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:40,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:40,774 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:40,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:40,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1062806691, now seen corresponding path program 1 times [2021-11-12 22:54:40,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:40,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17206920] [2021-11-12 22:54:40,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:40,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:40,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:40,777 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:40,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:54:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:41,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:54:41,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:54:41,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:54:41,912 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:41,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17206920] [2021-11-12 22:54:41,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17206920] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:54:41,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:54:41,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:54:41,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973239917] [2021-11-12 22:54:41,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:41,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:54:41,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:41,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:54:41,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:54:41,915 INFO L87 Difference]: Start difference. First operand 531 states and 888 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:41,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:41,995 INFO L93 Difference]: Finished difference Result 1053 states and 1768 transitions. [2021-11-12 22:54:41,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:54:41,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2021-11-12 22:54:41,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:42,002 INFO L225 Difference]: With dead ends: 1053 [2021-11-12 22:54:42,002 INFO L226 Difference]: Without dead ends: 531 [2021-11-12 22:54:42,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:54:42,006 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 12 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.20ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.42ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:42,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2618 Invalid, 33 Unknown, 0 Unchecked, 7.20ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 35.42ms Time] [2021-11-12 22:54:42,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-12 22:54:42,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-12 22:54:42,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 418 states have (on average 1.6985645933014355) internal successors, (710), 437 states have internal predecessors, (710), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:54:42,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 887 transitions. [2021-11-12 22:54:42,062 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 887 transitions. Word has length 101 [2021-11-12 22:54:42,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:42,062 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 887 transitions. [2021-11-12 22:54:42,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:42,063 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 887 transitions. [2021-11-12 22:54:42,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 22:54:42,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:42,067 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:54:42,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:42,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:42,286 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:42,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:42,286 INFO L85 PathProgramCache]: Analyzing trace with hash -706454475, now seen corresponding path program 1 times [2021-11-12 22:54:42,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:42,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704910170] [2021-11-12 22:54:42,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:42,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:42,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:42,294 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:42,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:54:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:42,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:54:42,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:54:43,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:54:43,459 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:43,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704910170] [2021-11-12 22:54:43,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704910170] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:54:43,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:54:43,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:54:43,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297589142] [2021-11-12 22:54:43,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:43,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:54:43,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:43,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:54:43,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:54:43,462 INFO L87 Difference]: Start difference. First operand 531 states and 887 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:43,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:43,544 INFO L93 Difference]: Finished difference Result 1057 states and 1771 transitions. [2021-11-12 22:54:43,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:54:43,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 103 [2021-11-12 22:54:43,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:43,552 INFO L225 Difference]: With dead ends: 1057 [2021-11-12 22:54:43,552 INFO L226 Difference]: Without dead ends: 537 [2021-11-12 22:54:43,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:54:43,563 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 13 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.80ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.80ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:43,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2618 Invalid, 35 Unknown, 0 Unchecked, 5.80ms Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 37.80ms Time] [2021-11-12 22:54:43,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-12 22:54:43,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-12 22:54:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 423 states have (on average 1.690307328605201) internal successors, (715), 442 states have internal predecessors, (715), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:54:43,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 892 transitions. [2021-11-12 22:54:43,599 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 892 transitions. Word has length 103 [2021-11-12 22:54:43,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:43,599 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 892 transitions. [2021-11-12 22:54:43,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:43,600 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 892 transitions. [2021-11-12 22:54:43,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-12 22:54:43,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:43,610 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:54:43,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:43,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:43,826 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:43,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:43,826 INFO L85 PathProgramCache]: Analyzing trace with hash -480058764, now seen corresponding path program 1 times [2021-11-12 22:54:43,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:43,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [66042464] [2021-11-12 22:54:43,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:43,827 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:43,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:43,828 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:43,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:54:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:44,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:54:44,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:54:44,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:54:44,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:44,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [66042464] [2021-11-12 22:54:44,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [66042464] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:54:44,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:54:44,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:54:44,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017334302] [2021-11-12 22:54:44,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:44,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:54:44,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:44,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:54:44,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:54:44,825 INFO L87 Difference]: Start difference. First operand 537 states and 892 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:44,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:44,919 INFO L93 Difference]: Finished difference Result 1056 states and 1762 transitions. [2021-11-12 22:54:44,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:54:44,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 104 [2021-11-12 22:54:44,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:44,925 INFO L225 Difference]: With dead ends: 1056 [2021-11-12 22:54:44,925 INFO L226 Difference]: Without dead ends: 537 [2021-11-12 22:54:44,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:54:44,942 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 8 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2619 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.14ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.89ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:44,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2619 Invalid, 30 Unknown, 0 Unchecked, 9.14ms Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 37.89ms Time] [2021-11-12 22:54:44,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-12 22:54:44,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-12 22:54:44,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 423 states have (on average 1.6879432624113475) internal successors, (714), 442 states have internal predecessors, (714), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:54:44,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 891 transitions. [2021-11-12 22:54:44,975 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 891 transitions. Word has length 104 [2021-11-12 22:54:44,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:44,975 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 891 transitions. [2021-11-12 22:54:44,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:44,976 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 891 transitions. [2021-11-12 22:54:44,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-12 22:54:44,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:44,980 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:54:45,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:45,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:45,205 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:45,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:45,205 INFO L85 PathProgramCache]: Analyzing trace with hash 701773849, now seen corresponding path program 1 times [2021-11-12 22:54:45,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:45,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046756045] [2021-11-12 22:54:45,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:45,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:45,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:45,207 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:45,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:54:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:45,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:54:45,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:54:45,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:54:46,230 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:46,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046756045] [2021-11-12 22:54:46,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046756045] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:54:46,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:54:46,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:54:46,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974439173] [2021-11-12 22:54:46,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:46,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:54:46,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:46,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:54:46,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:54:46,232 INFO L87 Difference]: Start difference. First operand 537 states and 891 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:46,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:46,307 INFO L93 Difference]: Finished difference Result 1056 states and 1761 transitions. [2021-11-12 22:54:46,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:54:46,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 105 [2021-11-12 22:54:46,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:46,313 INFO L225 Difference]: With dead ends: 1056 [2021-11-12 22:54:46,313 INFO L226 Difference]: Without dead ends: 537 [2021-11-12 22:54:46,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:54:46,319 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 6 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2619 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.15ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.13ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:46,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2619 Invalid, 28 Unknown, 0 Unchecked, 7.15ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 27.13ms Time] [2021-11-12 22:54:46,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-12 22:54:46,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-12 22:54:46,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 423 states have (on average 1.6855791962174942) internal successors, (713), 442 states have internal predecessors, (713), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:54:46,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 890 transitions. [2021-11-12 22:54:46,370 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 890 transitions. Word has length 105 [2021-11-12 22:54:46,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:46,371 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 890 transitions. [2021-11-12 22:54:46,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:46,377 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 890 transitions. [2021-11-12 22:54:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 22:54:46,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:46,382 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:54:46,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:46,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:46,602 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:46,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:46,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1437379352, now seen corresponding path program 1 times [2021-11-12 22:54:46,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:46,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302931368] [2021-11-12 22:54:46,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:46,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:46,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:46,604 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:46,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:54:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:47,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:54:47,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:47,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:54:47,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:47,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302931368] [2021-11-12 22:54:47,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302931368] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:54:47,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:54:47,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 22:54:47,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242505804] [2021-11-12 22:54:47,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:47,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:54:47,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:47,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:54:47,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:54:47,843 INFO L87 Difference]: Start difference. First operand 537 states and 890 transitions. Second operand has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 22:54:48,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:48,069 INFO L93 Difference]: Finished difference Result 1073 states and 1789 transitions. [2021-11-12 22:54:48,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:54:48,070 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2021-11-12 22:54:48,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:48,076 INFO L225 Difference]: With dead ends: 1073 [2021-11-12 22:54:48,076 INFO L226 Difference]: Without dead ends: 558 [2021-11-12 22:54:48,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:54:48,081 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 148 mSDsluCounter, 4263 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 139.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5137 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.46ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 157.67ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:48,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5137 Invalid, 85 Unknown, 0 Unchecked, 11.46ms Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 157.67ms Time] [2021-11-12 22:54:48,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-12 22:54:48,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 556. [2021-11-12 22:54:48,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 439 states have (on average 1.683371298405467) internal successors, (739), 460 states have internal predecessors, (739), 92 states have call successors, (92), 23 states have call predecessors, (92), 24 states have return successors, (90), 85 states have call predecessors, (90), 87 states have call successors, (90) [2021-11-12 22:54:48,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 921 transitions. [2021-11-12 22:54:48,111 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 921 transitions. Word has length 106 [2021-11-12 22:54:48,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:48,112 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 921 transitions. [2021-11-12 22:54:48,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 22:54:48,113 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 921 transitions. [2021-11-12 22:54:48,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 22:54:48,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:48,117 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:54:48,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:48,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:48,330 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:48,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:48,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1052012569, now seen corresponding path program 1 times [2021-11-12 22:54:48,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:48,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648013506] [2021-11-12 22:54:48,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:48,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:48,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:48,334 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:48,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:54:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:48,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:54:48,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:54:49,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:54:49,386 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:49,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648013506] [2021-11-12 22:54:49,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [648013506] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:54:49,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:54:49,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-12 22:54:49,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231141213] [2021-11-12 22:54:49,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:49,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:54:49,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:49,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:54:49,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:54:49,388 INFO L87 Difference]: Start difference. First operand 556 states and 921 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:49,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:49,478 INFO L93 Difference]: Finished difference Result 1086 states and 1811 transitions. [2021-11-12 22:54:49,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:54:49,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 106 [2021-11-12 22:54:49,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:49,487 INFO L225 Difference]: With dead ends: 1086 [2021-11-12 22:54:49,488 INFO L226 Difference]: Without dead ends: 552 [2021-11-12 22:54:49,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:54:49,492 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 8 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.66ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.30ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:49,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2618 Invalid, 30 Unknown, 0 Unchecked, 11.66ms Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 41.30ms Time] [2021-11-12 22:54:49,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-12 22:54:49,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2021-11-12 22:54:49,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 437 states have (on average 1.6842105263157894) internal successors, (736), 457 states have internal predecessors, (736), 91 states have call successors, (91), 23 states have call predecessors, (91), 23 states have return successors, (87), 84 states have call predecessors, (87), 86 states have call successors, (87) [2021-11-12 22:54:49,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 914 transitions. [2021-11-12 22:54:49,518 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 914 transitions. Word has length 106 [2021-11-12 22:54:49,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:49,519 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 914 transitions. [2021-11-12 22:54:49,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:49,519 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 914 transitions. [2021-11-12 22:54:49,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-12 22:54:49,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:49,523 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:54:49,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:49,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:49,738 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:49,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:49,738 INFO L85 PathProgramCache]: Analyzing trace with hash 943641823, now seen corresponding path program 1 times [2021-11-12 22:54:49,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:49,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285780758] [2021-11-12 22:54:49,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:49,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:49,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:49,740 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:49,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:54:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:50,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:54:50,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:50,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:54:50,808 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:50,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285780758] [2021-11-12 22:54:50,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285780758] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:54:50,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:54:50,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:54:50,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257654147] [2021-11-12 22:54:50,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:50,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:54:50,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:50,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:54:50,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:54:50,810 INFO L87 Difference]: Start difference. First operand 552 states and 914 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:51,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:51,020 INFO L93 Difference]: Finished difference Result 1112 states and 1856 transitions. [2021-11-12 22:54:51,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:54:51,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 107 [2021-11-12 22:54:51,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:51,033 INFO L225 Difference]: With dead ends: 1112 [2021-11-12 22:54:51,034 INFO L226 Difference]: Without dead ends: 552 [2021-11-12 22:54:51,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:54:51,039 INFO L933 BasicCegarLoop]: 822 mSDtfsCounter, 134 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 139.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2426 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.38ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 162.23ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:51,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2426 Invalid, 131 Unknown, 0 Unchecked, 6.38ms Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 162.23ms Time] [2021-11-12 22:54:51,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-12 22:54:51,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2021-11-12 22:54:51,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 437 states have (on average 1.6727688787185355) internal successors, (731), 457 states have internal predecessors, (731), 91 states have call successors, (91), 23 states have call predecessors, (91), 23 states have return successors, (87), 84 states have call predecessors, (87), 86 states have call successors, (87) [2021-11-12 22:54:51,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 909 transitions. [2021-11-12 22:54:51,066 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 909 transitions. Word has length 107 [2021-11-12 22:54:51,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:51,067 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 909 transitions. [2021-11-12 22:54:51,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:51,067 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 909 transitions. [2021-11-12 22:54:51,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 22:54:51,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:51,071 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:51,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:51,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:51,286 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:51,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:51,286 INFO L85 PathProgramCache]: Analyzing trace with hash 114608267, now seen corresponding path program 1 times [2021-11-12 22:54:51,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:51,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689644664] [2021-11-12 22:54:51,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:51,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:51,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:51,288 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:51,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:54:51,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:51,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:54:51,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:52,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:54:52,402 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:52,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689644664] [2021-11-12 22:54:52,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689644664] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:54:52,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:54:52,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:54:52,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408112355] [2021-11-12 22:54:52,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:52,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:54:52,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:52,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:54:52,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:54:52,404 INFO L87 Difference]: Start difference. First operand 552 states and 909 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:52,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:52,620 INFO L93 Difference]: Finished difference Result 1112 states and 1846 transitions. [2021-11-12 22:54:52,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:54:52,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 109 [2021-11-12 22:54:52,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:52,628 INFO L225 Difference]: With dead ends: 1112 [2021-11-12 22:54:52,628 INFO L226 Difference]: Without dead ends: 552 [2021-11-12 22:54:52,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:54:52,633 INFO L933 BasicCegarLoop]: 822 mSDtfsCounter, 128 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 142.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2426 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.17ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 167.83ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:52,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2426 Invalid, 121 Unknown, 0 Unchecked, 6.17ms Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 167.83ms Time] [2021-11-12 22:54:52,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-12 22:54:52,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2021-11-12 22:54:52,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 437 states have (on average 1.6613272311212814) internal successors, (726), 457 states have internal predecessors, (726), 91 states have call successors, (91), 23 states have call predecessors, (91), 23 states have return successors, (87), 84 states have call predecessors, (87), 86 states have call successors, (87) [2021-11-12 22:54:52,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 904 transitions. [2021-11-12 22:54:52,660 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 904 transitions. Word has length 109 [2021-11-12 22:54:52,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:52,660 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 904 transitions. [2021-11-12 22:54:52,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:52,661 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 904 transitions. [2021-11-12 22:54:52,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 22:54:52,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:52,665 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:54:52,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:52,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:52,886 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:52,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:52,886 INFO L85 PathProgramCache]: Analyzing trace with hash -406102145, now seen corresponding path program 1 times [2021-11-12 22:54:52,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:52,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523217996] [2021-11-12 22:54:52,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:52,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:52,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:52,889 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:52,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:54:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:53,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:54:53,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:53,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:54:54,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:54,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523217996] [2021-11-12 22:54:54,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523217996] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:54:54,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:54:54,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:54:54,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062245339] [2021-11-12 22:54:54,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:54,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:54:54,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:54,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:54:54,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:54:54,022 INFO L87 Difference]: Start difference. First operand 552 states and 904 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:54,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:54,243 INFO L93 Difference]: Finished difference Result 1133 states and 1867 transitions. [2021-11-12 22:54:54,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:54:54,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 111 [2021-11-12 22:54:54,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:54,250 INFO L225 Difference]: With dead ends: 1133 [2021-11-12 22:54:54,250 INFO L226 Difference]: Without dead ends: 582 [2021-11-12 22:54:54,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:54:54,255 INFO L933 BasicCegarLoop]: 832 mSDtfsCounter, 143 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 148.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2436 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.19ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 175.59ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:54,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2436 Invalid, 131 Unknown, 0 Unchecked, 5.19ms Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 175.59ms Time] [2021-11-12 22:54:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-11-12 22:54:54,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 567. [2021-11-12 22:54:54,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 452 states have (on average 1.6393805309734513) internal successors, (741), 471 states have internal predecessors, (741), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:54:54,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 918 transitions. [2021-11-12 22:54:54,278 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 918 transitions. Word has length 111 [2021-11-12 22:54:54,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:54,279 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 918 transitions. [2021-11-12 22:54:54,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:54,279 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 918 transitions. [2021-11-12 22:54:54,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 22:54:54,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:54,286 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:54:54,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:54,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:54,502 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:54,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:54,502 INFO L85 PathProgramCache]: Analyzing trace with hash -806284545, now seen corresponding path program 1 times [2021-11-12 22:54:54,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:54,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780701645] [2021-11-12 22:54:54,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:54,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:54,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:54,505 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:54,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:54:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:54,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:54:54,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:55,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:54:55,618 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:55,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780701645] [2021-11-12 22:54:55,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780701645] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:54:55,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:54:55,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-12 22:54:55,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149342822] [2021-11-12 22:54:55,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:55,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:54:55,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:55,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:54:55,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:54:55,620 INFO L87 Difference]: Start difference. First operand 567 states and 918 transitions. Second operand has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 22:54:55,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:55,798 INFO L93 Difference]: Finished difference Result 1097 states and 1788 transitions. [2021-11-12 22:54:55,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:54:55,799 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2021-11-12 22:54:55,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:55,805 INFO L225 Difference]: With dead ends: 1097 [2021-11-12 22:54:55,806 INFO L226 Difference]: Without dead ends: 561 [2021-11-12 22:54:55,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:54:55,810 INFO L933 BasicCegarLoop]: 877 mSDtfsCounter, 131 mSDsluCounter, 4228 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 115.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5105 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.76ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 127.90ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:55,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5105 Invalid, 75 Unknown, 0 Unchecked, 8.76ms Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 127.90ms Time] [2021-11-12 22:54:55,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-12 22:54:55,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 546. [2021-11-12 22:54:55,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 431 states have (on average 1.6334106728538282) internal successors, (704), 450 states have internal predecessors, (704), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:54:55,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 881 transitions. [2021-11-12 22:54:55,833 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 881 transitions. Word has length 111 [2021-11-12 22:54:55,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:55,834 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 881 transitions. [2021-11-12 22:54:55,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 22:54:55,834 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 881 transitions. [2021-11-12 22:54:55,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 22:54:55,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:55,838 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:54:55,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:56,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:56,054 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:56,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:56,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1718057205, now seen corresponding path program 1 times [2021-11-12 22:54:56,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:56,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754746749] [2021-11-12 22:54:56,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:56,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:56,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:56,057 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:56,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:54:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:56,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:54:56,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:56,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:54:57,138 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:57,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754746749] [2021-11-12 22:54:57,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754746749] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:54:57,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:54:57,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:54:57,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573678947] [2021-11-12 22:54:57,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:57,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:54:57,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:57,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:54:57,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:54:57,140 INFO L87 Difference]: Start difference. First operand 546 states and 881 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:57,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:57,265 INFO L93 Difference]: Finished difference Result 1061 states and 1726 transitions. [2021-11-12 22:54:57,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:54:57,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 112 [2021-11-12 22:54:57,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:57,272 INFO L225 Difference]: With dead ends: 1061 [2021-11-12 22:54:57,272 INFO L226 Difference]: Without dead ends: 546 [2021-11-12 22:54:57,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:54:57,276 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 69 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2450 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.62ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.23ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:57,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2450 Invalid, 54 Unknown, 0 Unchecked, 4.62ms Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 91.23ms Time] [2021-11-12 22:54:57,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-12 22:54:57,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-12 22:54:57,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 431 states have (on average 1.631090487238979) internal successors, (703), 450 states have internal predecessors, (703), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:54:57,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 880 transitions. [2021-11-12 22:54:57,299 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 880 transitions. Word has length 112 [2021-11-12 22:54:57,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:57,299 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 880 transitions. [2021-11-12 22:54:57,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:57,300 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 880 transitions. [2021-11-12 22:54:57,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 22:54:57,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:57,306 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:54:57,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:57,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:57,526 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:57,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:57,526 INFO L85 PathProgramCache]: Analyzing trace with hash 592143898, now seen corresponding path program 1 times [2021-11-12 22:54:57,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:57,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487792871] [2021-11-12 22:54:57,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:57,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:57,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:57,528 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:57,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:54:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:58,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:54:58,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:58,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:54:58,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:58,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487792871] [2021-11-12 22:54:58,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487792871] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:54:58,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:54:58,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:54:58,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810682127] [2021-11-12 22:54:58,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:58,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:54:58,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:58,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:54:58,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:54:58,597 INFO L87 Difference]: Start difference. First operand 546 states and 880 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:58,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:58,721 INFO L93 Difference]: Finished difference Result 1061 states and 1725 transitions. [2021-11-12 22:54:58,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:54:58,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 113 [2021-11-12 22:54:58,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:58,728 INFO L225 Difference]: With dead ends: 1061 [2021-11-12 22:54:58,728 INFO L226 Difference]: Without dead ends: 546 [2021-11-12 22:54:58,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:54:58,732 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 67 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2450 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.38ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.01ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:58,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2450 Invalid, 52 Unknown, 0 Unchecked, 4.38ms Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 90.01ms Time] [2021-11-12 22:54:58,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-12 22:54:58,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-12 22:54:58,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 431 states have (on average 1.62877030162413) internal successors, (702), 450 states have internal predecessors, (702), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:54:58,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 879 transitions. [2021-11-12 22:54:58,756 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 879 transitions. Word has length 113 [2021-11-12 22:54:58,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:58,756 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 879 transitions. [2021-11-12 22:54:58,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:54:58,757 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 879 transitions. [2021-11-12 22:54:58,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-12 22:54:58,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:58,761 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:54:58,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:58,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:58,974 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:58,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:58,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1793193328, now seen corresponding path program 1 times [2021-11-12 22:54:58,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:58,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812174514] [2021-11-12 22:54:58,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:58,975 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:58,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:58,977 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:58,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:54:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:59,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:54:59,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:54:59,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:55:00,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:00,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812174514] [2021-11-12 22:55:00,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812174514] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:55:00,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:55:00,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 22:55:00,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603928142] [2021-11-12 22:55:00,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:00,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:55:00,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:00,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:55:00,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:55:00,265 INFO L87 Difference]: Start difference. First operand 546 states and 879 transitions. Second operand has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 22:55:00,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:00,546 INFO L93 Difference]: Finished difference Result 1066 states and 1732 transitions. [2021-11-12 22:55:00,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:55:00,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 114 [2021-11-12 22:55:00,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:00,553 INFO L225 Difference]: With dead ends: 1066 [2021-11-12 22:55:00,554 INFO L226 Difference]: Without dead ends: 557 [2021-11-12 22:55:00,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:55:00,559 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 109 mSDsluCounter, 4862 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 177.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5683 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.65ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 197.09ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:00,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5683 Invalid, 152 Unknown, 0 Unchecked, 8.65ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 197.09ms Time] [2021-11-12 22:55:00,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-12 22:55:00,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 548. [2021-11-12 22:55:00,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 433 states have (on average 1.6235565819861433) internal successors, (703), 452 states have internal predecessors, (703), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:55:00,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 880 transitions. [2021-11-12 22:55:00,586 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 880 transitions. Word has length 114 [2021-11-12 22:55:00,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:00,586 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 880 transitions. [2021-11-12 22:55:00,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 22:55:00,587 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 880 transitions. [2021-11-12 22:55:00,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-12 22:55:00,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:00,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:00,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:00,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:00,809 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:00,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:00,809 INFO L85 PathProgramCache]: Analyzing trace with hash 752758245, now seen corresponding path program 1 times [2021-11-12 22:55:00,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:00,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758378579] [2021-11-12 22:55:00,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:00,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:00,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:00,811 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:00,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:55:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:01,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:55:01,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:55:01,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:55:02,006 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:02,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758378579] [2021-11-12 22:55:02,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758378579] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:55:02,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:55:02,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 22:55:02,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153421680] [2021-11-12 22:55:02,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:02,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:55:02,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:02,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:55:02,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:55:02,008 INFO L87 Difference]: Start difference. First operand 548 states and 880 transitions. Second operand has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 22:55:02,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:02,263 INFO L93 Difference]: Finished difference Result 1058 states and 1713 transitions. [2021-11-12 22:55:02,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:55:02,265 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 115 [2021-11-12 22:55:02,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:02,270 INFO L225 Difference]: With dead ends: 1058 [2021-11-12 22:55:02,270 INFO L226 Difference]: Without dead ends: 553 [2021-11-12 22:55:02,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:55:02,274 INFO L933 BasicCegarLoop]: 823 mSDtfsCounter, 77 mSDsluCounter, 4868 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 154.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 5691 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.16ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 176.10ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:02,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 5691 Invalid, 152 Unknown, 0 Unchecked, 8.16ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 176.10ms Time] [2021-11-12 22:55:02,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-11-12 22:55:02,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 550. [2021-11-12 22:55:02,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 435 states have (on average 1.6183908045977011) internal successors, (704), 454 states have internal predecessors, (704), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:55:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 881 transitions. [2021-11-12 22:55:02,298 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 881 transitions. Word has length 115 [2021-11-12 22:55:02,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:02,298 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 881 transitions. [2021-11-12 22:55:02,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 22:55:02,299 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 881 transitions. [2021-11-12 22:55:02,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 22:55:02,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:02,303 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:02,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:02,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:02,518 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:02,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:02,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1184020902, now seen corresponding path program 1 times [2021-11-12 22:55:02,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:02,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196444719] [2021-11-12 22:55:02,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:02,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:02,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:02,520 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:02,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:55:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:03,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:55:03,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:55:03,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:55:03,668 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:03,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196444719] [2021-11-12 22:55:03,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196444719] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:03,668 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:03,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:55:03,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859385505] [2021-11-12 22:55:03,669 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:03,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:55:03,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:03,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:55:03,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:55:03,670 INFO L87 Difference]: Start difference. First operand 550 states and 881 transitions. Second operand has 11 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 22:55:03,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:03,855 INFO L93 Difference]: Finished difference Result 1004 states and 1640 transitions. [2021-11-12 22:55:03,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:55:03,857 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 116 [2021-11-12 22:55:03,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:03,862 INFO L225 Difference]: With dead ends: 1004 [2021-11-12 22:55:03,862 INFO L226 Difference]: Without dead ends: 543 [2021-11-12 22:55:03,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:55:03,867 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 110 mSDsluCounter, 4156 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 125.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 4991 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.15ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 138.68ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:03,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 4991 Invalid, 93 Unknown, 0 Unchecked, 6.15ms Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 138.68ms Time] [2021-11-12 22:55:03,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-11-12 22:55:03,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2021-11-12 22:55:03,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 428 states have (on average 1.6261682242990654) internal successors, (696), 447 states have internal predecessors, (696), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:55:03,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 873 transitions. [2021-11-12 22:55:03,887 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 873 transitions. Word has length 116 [2021-11-12 22:55:03,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:03,888 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 873 transitions. [2021-11-12 22:55:03,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 22:55:03,888 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 873 transitions. [2021-11-12 22:55:03,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 22:55:03,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:03,893 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:55:03,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:04,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:04,113 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:04,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:04,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1583191951, now seen corresponding path program 1 times [2021-11-12 22:55:04,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:04,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089078871] [2021-11-12 22:55:04,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:04,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:04,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:04,115 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:04,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:55:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:04,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 1004 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:55:04,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:55:04,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:05,204 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:55:05,204 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:05,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089078871] [2021-11-12 22:55:05,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089078871] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:05,204 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:05,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:55:05,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287594659] [2021-11-12 22:55:05,205 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:05,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:55:05,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:05,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:55:05,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:55:05,208 INFO L87 Difference]: Start difference. First operand 543 states and 873 transitions. Second operand has 11 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 22:55:05,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:05,431 INFO L93 Difference]: Finished difference Result 1009 states and 1654 transitions. [2021-11-12 22:55:05,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:55:05,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 117 [2021-11-12 22:55:05,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:05,438 INFO L225 Difference]: With dead ends: 1009 [2021-11-12 22:55:05,438 INFO L226 Difference]: Without dead ends: 540 [2021-11-12 22:55:05,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:55:05,442 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 97 mSDsluCounter, 7336 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 140.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 8163 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.64ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 170.63ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:05,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 8163 Invalid, 116 Unknown, 0 Unchecked, 9.64ms Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 170.63ms Time] [2021-11-12 22:55:05,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-12 22:55:05,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-12 22:55:05,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 425 states have (on average 1.6258823529411766) internal successors, (691), 444 states have internal predecessors, (691), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:55:05,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 868 transitions. [2021-11-12 22:55:05,480 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 868 transitions. Word has length 117 [2021-11-12 22:55:05,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:05,481 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 868 transitions. [2021-11-12 22:55:05,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 22:55:05,481 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 868 transitions. [2021-11-12 22:55:05,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 22:55:05,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:05,485 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:05,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:05,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:05,706 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:05,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:05,706 INFO L85 PathProgramCache]: Analyzing trace with hash -244988687, now seen corresponding path program 1 times [2021-11-12 22:55:05,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:05,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051979704] [2021-11-12 22:55:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:05,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:05,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:05,707 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:05,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:55:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:06,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:55:06,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:55:06,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:55:06,727 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:06,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051979704] [2021-11-12 22:55:06,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051979704] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:06,727 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:06,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:55:06,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578409589] [2021-11-12 22:55:06,728 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:06,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:55:06,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:06,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:55:06,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:55:06,730 INFO L87 Difference]: Start difference. First operand 540 states and 868 transitions. Second operand has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 22:55:06,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:06,861 INFO L93 Difference]: Finished difference Result 1006 states and 1649 transitions. [2021-11-12 22:55:06,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:55:06,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 117 [2021-11-12 22:55:06,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:06,868 INFO L225 Difference]: With dead ends: 1006 [2021-11-12 22:55:06,868 INFO L226 Difference]: Without dead ends: 532 [2021-11-12 22:55:06,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:55:06,872 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 142 mSDsluCounter, 4067 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 4893 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.43ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 100.20ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:06,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 4893 Invalid, 68 Unknown, 0 Unchecked, 4.43ms Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 100.20ms Time] [2021-11-12 22:55:06,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-11-12 22:55:06,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 532. [2021-11-12 22:55:06,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 417 states have (on average 1.630695443645084) internal successors, (680), 436 states have internal predecessors, (680), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:55:06,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 857 transitions. [2021-11-12 22:55:06,892 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 857 transitions. Word has length 117 [2021-11-12 22:55:06,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:06,893 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 857 transitions. [2021-11-12 22:55:06,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 22:55:06,893 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 857 transitions. [2021-11-12 22:55:06,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 22:55:06,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:06,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:06,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:07,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:07,117 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:07,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:07,118 INFO L85 PathProgramCache]: Analyzing trace with hash 430068830, now seen corresponding path program 1 times [2021-11-12 22:55:07,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:07,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [968510899] [2021-11-12 22:55:07,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:07,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:07,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:07,120 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:07,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:55:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:07,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:55:07,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:55:07,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:55:08,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:08,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [968510899] [2021-11-12 22:55:08,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [968510899] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:08,305 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:08,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:55:08,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400792028] [2021-11-12 22:55:08,306 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:08,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:55:08,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:08,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:55:08,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:55:08,307 INFO L87 Difference]: Start difference. First operand 532 states and 857 transitions. Second operand has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 22:55:08,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:08,489 INFO L93 Difference]: Finished difference Result 992 states and 1627 transitions. [2021-11-12 22:55:08,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:55:08,492 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 118 [2021-11-12 22:55:08,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:08,497 INFO L225 Difference]: With dead ends: 992 [2021-11-12 22:55:08,497 INFO L226 Difference]: Without dead ends: 532 [2021-11-12 22:55:08,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:55:08,501 INFO L933 BasicCegarLoop]: 822 mSDtfsCounter, 67 mSDsluCounter, 6450 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 113.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 7272 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.00ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 134.16ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:08,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 7272 Invalid, 130 Unknown, 0 Unchecked, 6.00ms Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 134.16ms Time] [2021-11-12 22:55:08,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-11-12 22:55:08,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 532. [2021-11-12 22:55:08,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 417 states have (on average 1.6282973621103118) internal successors, (679), 436 states have internal predecessors, (679), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:55:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 856 transitions. [2021-11-12 22:55:08,521 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 856 transitions. Word has length 118 [2021-11-12 22:55:08,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:08,522 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 856 transitions. [2021-11-12 22:55:08,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 22:55:08,522 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 856 transitions. [2021-11-12 22:55:08,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 22:55:08,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:08,526 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:08,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:08,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:08,739 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:08,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:08,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1927578097, now seen corresponding path program 1 times [2021-11-12 22:55:08,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:08,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491567785] [2021-11-12 22:55:08,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:08,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:08,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:08,741 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:08,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:55:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:09,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:55:09,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:55:09,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:55:09,971 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:09,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491567785] [2021-11-12 22:55:09,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491567785] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:09,971 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:09,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:55:09,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878390844] [2021-11-12 22:55:09,971 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:09,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:55:09,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:09,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:55:09,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:55:09,973 INFO L87 Difference]: Start difference. First operand 532 states and 856 transitions. Second operand has 13 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 22:55:10,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:10,274 INFO L93 Difference]: Finished difference Result 1036 states and 1684 transitions. [2021-11-12 22:55:10,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:55:10,275 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 119 [2021-11-12 22:55:10,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:10,280 INFO L225 Difference]: With dead ends: 1036 [2021-11-12 22:55:10,280 INFO L226 Difference]: Without dead ends: 529 [2021-11-12 22:55:10,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:55:10,285 INFO L933 BasicCegarLoop]: 810 mSDtfsCounter, 101 mSDsluCounter, 7990 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 197.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 8800 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.87ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 217.69ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:10,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 8800 Invalid, 151 Unknown, 0 Unchecked, 8.87ms Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 217.69ms Time] [2021-11-12 22:55:10,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-11-12 22:55:10,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2021-11-12 22:55:10,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 414 states have (on average 1.6207729468599035) internal successors, (671), 433 states have internal predecessors, (671), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:55:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 848 transitions. [2021-11-12 22:55:10,304 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 848 transitions. Word has length 119 [2021-11-12 22:55:10,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:10,305 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 848 transitions. [2021-11-12 22:55:10,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 22:55:10,305 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 848 transitions. [2021-11-12 22:55:10,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 22:55:10,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:10,309 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:10,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:10,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:10,530 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:10,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:10,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1152104323, now seen corresponding path program 1 times [2021-11-12 22:55:10,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:10,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1690980952] [2021-11-12 22:55:10,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:10,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:10,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:10,531 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:10,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:55:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:10,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:55:10,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:55:11,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:55:11,692 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:11,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1690980952] [2021-11-12 22:55:11,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1690980952] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:11,693 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:11,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:55:11,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935351081] [2021-11-12 22:55:11,694 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:11,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:55:11,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:11,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:55:11,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:55:11,696 INFO L87 Difference]: Start difference. First operand 529 states and 848 transitions. Second operand has 13 states, 11 states have (on average 13.181818181818182) internal successors, (145), 11 states have internal predecessors, (145), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 22:55:11,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:11,866 INFO L93 Difference]: Finished difference Result 983 states and 1607 transitions. [2021-11-12 22:55:11,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:55:11,869 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 13.181818181818182) internal successors, (145), 11 states have internal predecessors, (145), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 120 [2021-11-12 22:55:11,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:11,873 INFO L225 Difference]: With dead ends: 983 [2021-11-12 22:55:11,874 INFO L226 Difference]: Without dead ends: 529 [2021-11-12 22:55:11,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:55:11,877 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 100 mSDsluCounter, 4826 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 5637 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.26ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.29ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:11,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 5637 Invalid, 117 Unknown, 0 Unchecked, 5.26ms Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 122.29ms Time] [2021-11-12 22:55:11,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-11-12 22:55:11,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2021-11-12 22:55:11,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 414 states have (on average 1.6183574879227054) internal successors, (670), 433 states have internal predecessors, (670), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:55:11,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 847 transitions. [2021-11-12 22:55:11,897 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 847 transitions. Word has length 120 [2021-11-12 22:55:11,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:11,897 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 847 transitions. [2021-11-12 22:55:11,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 13.181818181818182) internal successors, (145), 11 states have internal predecessors, (145), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 22:55:11,898 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 847 transitions. [2021-11-12 22:55:11,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-12 22:55:11,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:11,902 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:11,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:12,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:12,119 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:12,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:12,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1839877632, now seen corresponding path program 1 times [2021-11-12 22:55:12,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:12,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207618113] [2021-11-12 22:55:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:12,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:12,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:12,121 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:12,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:55:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:12,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 1008 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:55:12,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:55:12,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:55:13,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:13,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207618113] [2021-11-12 22:55:13,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207618113] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:13,286 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:13,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:55:13,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628768553] [2021-11-12 22:55:13,286 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:13,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:55:13,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:13,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:55:13,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:55:13,288 INFO L87 Difference]: Start difference. First operand 529 states and 847 transitions. Second operand has 13 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 22:55:13,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:13,498 INFO L93 Difference]: Finished difference Result 1021 states and 1652 transitions. [2021-11-12 22:55:13,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:55:13,501 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 121 [2021-11-12 22:55:13,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:13,506 INFO L225 Difference]: With dead ends: 1021 [2021-11-12 22:55:13,507 INFO L226 Difference]: Without dead ends: 526 [2021-11-12 22:55:13,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:55:13,511 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 96 mSDsluCounter, 5603 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 121.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 6412 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.25ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 138.64ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:13,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 6412 Invalid, 118 Unknown, 0 Unchecked, 6.25ms Time], IncrementalHoareTripleChecker [4 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 138.64ms Time] [2021-11-12 22:55:13,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-11-12 22:55:13,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2021-11-12 22:55:13,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 411 states have (on average 1.610705596107056) internal successors, (662), 430 states have internal predecessors, (662), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-12 22:55:13,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 839 transitions. [2021-11-12 22:55:13,534 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 839 transitions. Word has length 121 [2021-11-12 22:55:13,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:13,535 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 839 transitions. [2021-11-12 22:55:13,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 22:55:13,536 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 839 transitions. [2021-11-12 22:55:13,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 22:55:13,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:13,540 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:13,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:13,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:13,761 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:13,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:13,761 INFO L85 PathProgramCache]: Analyzing trace with hash 858009960, now seen corresponding path program 1 times [2021-11-12 22:55:13,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:13,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372955246] [2021-11-12 22:55:13,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:13,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:13,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:13,764 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:13,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:55:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:14,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 1009 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:55:14,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:55:14,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:55:15,521 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:15,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372955246] [2021-11-12 22:55:15,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372955246] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:15,522 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:15,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-12 22:55:15,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197530286] [2021-11-12 22:55:15,522 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:15,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:55:15,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:15,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:55:15,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:55:15,524 INFO L87 Difference]: Start difference. First operand 526 states and 839 transitions. Second operand has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 12 states have internal predecessors, (153), 6 states have call successors, (23), 5 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-12 22:55:17,554 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:19,562 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:21,570 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:26,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:26,097 INFO L93 Difference]: Finished difference Result 1109 states and 1842 transitions. [2021-11-12 22:55:26,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:55:26,098 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 12 states have internal predecessors, (153), 6 states have call successors, (23), 5 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 5 states have call successors, (22) Word has length 122 [2021-11-12 22:55:26,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:26,102 INFO L225 Difference]: With dead ends: 1109 [2021-11-12 22:55:26,102 INFO L226 Difference]: Without dead ends: 663 [2021-11-12 22:55:26,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:55:26,105 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 1531 mSDsluCounter, 2055 mSDsCounter, 0 mSdLazyCounter, 3187 mSolverCounterSat, 596 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9802.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1531 SdHoareTripleChecker+Valid, 2966 SdHoareTripleChecker+Invalid, 3786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.20ms SdHoareTripleChecker+Time, 596 IncrementalHoareTripleChecker+Valid, 3187 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10359.09ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:26,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1531 Valid, 2966 Invalid, 3786 Unknown, 0 Unchecked, 31.20ms Time], IncrementalHoareTripleChecker [596 Valid, 3187 Invalid, 3 Unknown, 0 Unchecked, 10359.09ms Time] [2021-11-12 22:55:26,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-11-12 22:55:26,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 530. [2021-11-12 22:55:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 414 states have (on average 1.606280193236715) internal successors, (665), 433 states have internal predecessors, (665), 91 states have call successors, (91), 24 states have call predecessors, (91), 24 states have return successors, (102), 85 states have call predecessors, (102), 86 states have call successors, (102) [2021-11-12 22:55:26,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 858 transitions. [2021-11-12 22:55:26,139 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 858 transitions. Word has length 122 [2021-11-12 22:55:26,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:26,140 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 858 transitions. [2021-11-12 22:55:26,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 12 states have internal predecessors, (153), 6 states have call successors, (23), 5 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-12 22:55:26,141 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 858 transitions. [2021-11-12 22:55:26,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 22:55:26,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:26,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:26,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:26,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:26,362 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:26,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:26,362 INFO L85 PathProgramCache]: Analyzing trace with hash 319927097, now seen corresponding path program 1 times [2021-11-12 22:55:26,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:26,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657476864] [2021-11-12 22:55:26,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:26,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:26,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:26,365 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:26,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:55:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:26,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:55:26,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:55:27,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:27,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:55:27,741 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:27,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657476864] [2021-11-12 22:55:27,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657476864] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:27,741 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:27,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 22:55:27,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545758036] [2021-11-12 22:55:27,742 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:27,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:55:27,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:27,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:55:27,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:55:27,743 INFO L87 Difference]: Start difference. First operand 530 states and 858 transitions. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-12 22:55:29,765 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:31,772 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:37,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:37,641 INFO L93 Difference]: Finished difference Result 1837 states and 3131 transitions. [2021-11-12 22:55:37,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:55:37,643 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 5 states have call successors, (19) Word has length 123 [2021-11-12 22:55:37,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:37,654 INFO L225 Difference]: With dead ends: 1837 [2021-11-12 22:55:37,654 INFO L226 Difference]: Without dead ends: 1387 [2021-11-12 22:55:37,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:55:37,659 INFO L933 BasicCegarLoop]: 1361 mSDtfsCounter, 4504 mSDsluCounter, 2297 mSDsCounter, 0 mSdLazyCounter, 4675 mSolverCounterSat, 1331 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8718.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4579 SdHoareTripleChecker+Valid, 3658 SdHoareTripleChecker+Invalid, 6008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.25ms SdHoareTripleChecker+Time, 1331 IncrementalHoareTripleChecker+Valid, 4675 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9587.32ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:37,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4579 Valid, 3658 Invalid, 6008 Unknown, 0 Unchecked, 36.25ms Time], IncrementalHoareTripleChecker [1331 Valid, 4675 Invalid, 2 Unknown, 0 Unchecked, 9587.32ms Time] [2021-11-12 22:55:37,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2021-11-12 22:55:37,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1299. [2021-11-12 22:55:37,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1008 states have (on average 1.6408730158730158) internal successors, (1654), 1056 states have internal predecessors, (1654), 232 states have call successors, (232), 57 states have call predecessors, (232), 58 states have return successors, (250), 222 states have call predecessors, (250), 227 states have call successors, (250) [2021-11-12 22:55:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 2136 transitions. [2021-11-12 22:55:37,731 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 2136 transitions. Word has length 123 [2021-11-12 22:55:37,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:37,732 INFO L470 AbstractCegarLoop]: Abstraction has 1299 states and 2136 transitions. [2021-11-12 22:55:37,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-12 22:55:37,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 2136 transitions. [2021-11-12 22:55:37,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 22:55:37,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:37,736 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:55:37,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:37,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:37,956 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:37,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:37,957 INFO L85 PathProgramCache]: Analyzing trace with hash 683967202, now seen corresponding path program 1 times [2021-11-12 22:55:37,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:37,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1676132568] [2021-11-12 22:55:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:37,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:37,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:37,958 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:37,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 22:55:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:38,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:55:38,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:38,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:55:38,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:39,213 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:55:39,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:39,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1676132568] [2021-11-12 22:55:39,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1676132568] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:39,213 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:39,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 12 [2021-11-12 22:55:39,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200887416] [2021-11-12 22:55:39,214 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:39,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:55:39,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:39,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:55:39,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:55:39,215 INFO L87 Difference]: Start difference. First operand 1299 states and 2136 transitions. Second operand has 12 states, 12 states have (on average 13.833333333333334) internal successors, (166), 12 states have internal predecessors, (166), 7 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-12 22:55:41,234 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:43,240 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:45,245 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:47,249 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:55,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:55,849 INFO L93 Difference]: Finished difference Result 6346 states and 10948 transitions. [2021-11-12 22:55:55,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:55:55,851 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.833333333333334) internal successors, (166), 12 states have internal predecessors, (166), 7 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 125 [2021-11-12 22:55:55,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:55,882 INFO L225 Difference]: With dead ends: 6346 [2021-11-12 22:55:55,883 INFO L226 Difference]: Without dead ends: 5127 [2021-11-12 22:55:55,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-11-12 22:55:55,891 INFO L933 BasicCegarLoop]: 1620 mSDtfsCounter, 4063 mSDsluCounter, 2825 mSDsCounter, 0 mSdLazyCounter, 7459 mSolverCounterSat, 1756 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15002.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4166 SdHoareTripleChecker+Valid, 4445 SdHoareTripleChecker+Invalid, 9219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 43.77ms SdHoareTripleChecker+Time, 1756 IncrementalHoareTripleChecker+Valid, 7459 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16092.58ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:55,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4166 Valid, 4445 Invalid, 9219 Unknown, 0 Unchecked, 43.77ms Time], IncrementalHoareTripleChecker [1756 Valid, 7459 Invalid, 4 Unknown, 0 Unchecked, 16092.58ms Time] [2021-11-12 22:55:55,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5127 states. [2021-11-12 22:55:56,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5127 to 2808. [2021-11-12 22:55:56,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2808 states, 2137 states have (on average 1.642957416939635) internal successors, (3511), 2250 states have internal predecessors, (3511), 554 states have call successors, (554), 106 states have call predecessors, (554), 116 states have return successors, (613), 540 states have call predecessors, (613), 549 states have call successors, (613) [2021-11-12 22:55:56,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2808 states to 2808 states and 4678 transitions. [2021-11-12 22:55:56,201 INFO L78 Accepts]: Start accepts. Automaton has 2808 states and 4678 transitions. Word has length 125 [2021-11-12 22:55:56,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:56,202 INFO L470 AbstractCegarLoop]: Abstraction has 2808 states and 4678 transitions. [2021-11-12 22:55:56,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.833333333333334) internal successors, (166), 12 states have internal predecessors, (166), 7 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-12 22:55:56,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2808 states and 4678 transitions. [2021-11-12 22:55:56,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 22:55:56,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:56,206 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:55:56,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:56,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:56,422 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:56,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:56,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1161399964, now seen corresponding path program 1 times [2021-11-12 22:55:56,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:56,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876907318] [2021-11-12 22:55:56,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:56,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:56,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:56,425 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:56,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 22:55:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:56,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:55:56,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:55:57,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:55:57,685 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:57,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876907318] [2021-11-12 22:55:57,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876907318] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:57,685 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:57,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 22:55:57,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442817109] [2021-11-12 22:55:57,686 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:57,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:55:57,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:57,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:55:57,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:55:57,687 INFO L87 Difference]: Start difference. First operand 2808 states and 4678 transitions. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-12 22:55:59,707 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:01,713 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:06,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:06,276 INFO L93 Difference]: Finished difference Result 7610 states and 12874 transitions. [2021-11-12 22:56:06,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 22:56:06,277 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) Word has length 125 [2021-11-12 22:56:06,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:06,332 INFO L225 Difference]: With dead ends: 7610 [2021-11-12 22:56:06,332 INFO L226 Difference]: Without dead ends: 5604 [2021-11-12 22:56:06,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:56:06,347 INFO L933 BasicCegarLoop]: 996 mSDtfsCounter, 3196 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 685 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7376.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3269 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 3220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.52ms SdHoareTripleChecker+Time, 685 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8037.46ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:06,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3269 Valid, 1994 Invalid, 3220 Unknown, 0 Unchecked, 22.52ms Time], IncrementalHoareTripleChecker [685 Valid, 2533 Invalid, 2 Unknown, 0 Unchecked, 8037.46ms Time] [2021-11-12 22:56:06,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5604 states. [2021-11-12 22:56:06,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5604 to 5213. [2021-11-12 22:56:06,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5213 states, 3978 states have (on average 1.6460532931121166) internal successors, (6548), 4196 states have internal predecessors, (6548), 1000 states have call successors, (1000), 190 states have call predecessors, (1000), 234 states have return successors, (1214), 975 states have call predecessors, (1214), 995 states have call successors, (1214) [2021-11-12 22:56:06,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5213 states to 5213 states and 8762 transitions. [2021-11-12 22:56:06,821 INFO L78 Accepts]: Start accepts. Automaton has 5213 states and 8762 transitions. Word has length 125 [2021-11-12 22:56:06,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:06,822 INFO L470 AbstractCegarLoop]: Abstraction has 5213 states and 8762 transitions. [2021-11-12 22:56:06,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-12 22:56:06,822 INFO L276 IsEmpty]: Start isEmpty. Operand 5213 states and 8762 transitions. [2021-11-12 22:56:06,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-12 22:56:06,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:06,826 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:06,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:07,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:07,042 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:07,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:07,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1798199924, now seen corresponding path program 1 times [2021-11-12 22:56:07,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:07,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066363920] [2021-11-12 22:56:07,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:07,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:07,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:07,044 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:07,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 22:56:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:07,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:56:07,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:08,136 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:56:08,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:09,007 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:56:09,007 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:09,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066363920] [2021-11-12 22:56:09,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066363920] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:09,008 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:09,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-12 22:56:09,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551107934] [2021-11-12 22:56:09,008 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:09,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:56:09,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:09,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:56:09,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:56:09,012 INFO L87 Difference]: Start difference. First operand 5213 states and 8762 transitions. Second operand has 14 states, 14 states have (on average 11.142857142857142) internal successors, (156), 12 states have internal predecessors, (156), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (23), 9 states have call predecessors, (23), 6 states have call successors, (23) [2021-11-12 22:56:11,042 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:13,046 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:15,052 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:17,057 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:25,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:25,303 INFO L93 Difference]: Finished difference Result 14068 states and 23772 transitions. [2021-11-12 22:56:25,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 22:56:25,305 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.142857142857142) internal successors, (156), 12 states have internal predecessors, (156), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (23), 9 states have call predecessors, (23), 6 states have call successors, (23) Word has length 130 [2021-11-12 22:56:25,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:25,370 INFO L225 Difference]: With dead ends: 14068 [2021-11-12 22:56:25,371 INFO L226 Difference]: Without dead ends: 9557 [2021-11-12 22:56:25,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-12 22:56:25,393 INFO L933 BasicCegarLoop]: 944 mSDtfsCounter, 4646 mSDsluCounter, 2265 mSDsCounter, 0 mSdLazyCounter, 5995 mSolverCounterSat, 1300 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14250.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4720 SdHoareTripleChecker+Valid, 3209 SdHoareTripleChecker+Invalid, 7299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.43ms SdHoareTripleChecker+Time, 1300 IncrementalHoareTripleChecker+Valid, 5995 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15252.41ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:25,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4720 Valid, 3209 Invalid, 7299 Unknown, 0 Unchecked, 38.43ms Time], IncrementalHoareTripleChecker [1300 Valid, 5995 Invalid, 4 Unknown, 0 Unchecked, 15252.41ms Time] [2021-11-12 22:56:25,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9557 states. [2021-11-12 22:56:26,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9557 to 9263. [2021-11-12 22:56:26,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9263 states, 7042 states have (on average 1.636750923033229) internal successors, (11526), 7424 states have internal predecessors, (11526), 1792 states have call successors, (1792), 348 states have call predecessors, (1792), 428 states have return successors, (2192), 1751 states have call predecessors, (2192), 1787 states have call successors, (2192) [2021-11-12 22:56:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9263 states to 9263 states and 15510 transitions. [2021-11-12 22:56:26,180 INFO L78 Accepts]: Start accepts. Automaton has 9263 states and 15510 transitions. Word has length 130 [2021-11-12 22:56:26,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:26,181 INFO L470 AbstractCegarLoop]: Abstraction has 9263 states and 15510 transitions. [2021-11-12 22:56:26,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.142857142857142) internal successors, (156), 12 states have internal predecessors, (156), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (23), 9 states have call predecessors, (23), 6 states have call successors, (23) [2021-11-12 22:56:26,181 INFO L276 IsEmpty]: Start isEmpty. Operand 9263 states and 15510 transitions. [2021-11-12 22:56:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 22:56:26,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:26,185 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:56:26,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:26,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:26,405 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:26,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:26,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1169050008, now seen corresponding path program 1 times [2021-11-12 22:56:26,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:26,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680788886] [2021-11-12 22:56:26,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:26,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:26,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:26,408 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:26,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 22:56:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:27,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:56:27,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:27,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:56:27,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:27,755 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:56:27,755 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:27,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680788886] [2021-11-12 22:56:27,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680788886] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:27,756 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:27,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:56:27,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199660164] [2021-11-12 22:56:27,756 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:27,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:56:27,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:27,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:56:27,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:56:27,758 INFO L87 Difference]: Start difference. First operand 9263 states and 15510 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 22:56:28,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:28,450 INFO L93 Difference]: Finished difference Result 18356 states and 31020 transitions. [2021-11-12 22:56:28,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:56:28,451 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 137 [2021-11-12 22:56:28,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:28,514 INFO L225 Difference]: With dead ends: 18356 [2021-11-12 22:56:28,514 INFO L226 Difference]: Without dead ends: 9263 [2021-11-12 22:56:28,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:56:28,545 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 310 mSDsluCounter, 2134 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 2992 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.55ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 107.85ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:28,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 2992 Invalid, 88 Unknown, 0 Unchecked, 4.55ms Time], IncrementalHoareTripleChecker [27 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 107.85ms Time] [2021-11-12 22:56:28,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9263 states. [2021-11-12 22:56:29,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9263 to 9263. [2021-11-12 22:56:29,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9263 states, 7042 states have (on average 1.6191422891224083) internal successors, (11402), 7424 states have internal predecessors, (11402), 1792 states have call successors, (1792), 348 states have call predecessors, (1792), 428 states have return successors, (2192), 1751 states have call predecessors, (2192), 1787 states have call successors, (2192) [2021-11-12 22:56:29,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9263 states to 9263 states and 15386 transitions. [2021-11-12 22:56:29,311 INFO L78 Accepts]: Start accepts. Automaton has 9263 states and 15386 transitions. Word has length 137 [2021-11-12 22:56:29,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:29,312 INFO L470 AbstractCegarLoop]: Abstraction has 9263 states and 15386 transitions. [2021-11-12 22:56:29,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 22:56:29,312 INFO L276 IsEmpty]: Start isEmpty. Operand 9263 states and 15386 transitions. [2021-11-12 22:56:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-12 22:56:29,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:29,316 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:56:29,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:29,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:29,536 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:29,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:29,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1673174119, now seen corresponding path program 1 times [2021-11-12 22:56:29,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:29,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321194183] [2021-11-12 22:56:29,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:29,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:29,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:29,539 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:29,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 22:56:30,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:30,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:56:30,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:56:30,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:56:31,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:31,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321194183] [2021-11-12 22:56:31,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321194183] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:31,222 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:31,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-12 22:56:31,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501915921] [2021-11-12 22:56:31,226 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:31,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:56:31,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:31,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:56:31,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:56:31,228 INFO L87 Difference]: Start difference. First operand 9263 states and 15386 transitions. Second operand has 9 states, 9 states have (on average 17.333333333333332) internal successors, (156), 9 states have internal predecessors, (156), 5 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 22:56:33,250 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:35,258 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:39,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:39,812 INFO L93 Difference]: Finished difference Result 18486 states and 30796 transitions. [2021-11-12 22:56:39,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:56:39,812 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.333333333333332) internal successors, (156), 9 states have internal predecessors, (156), 5 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) Word has length 142 [2021-11-12 22:56:39,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:39,884 INFO L225 Difference]: With dead ends: 18486 [2021-11-12 22:56:39,884 INFO L226 Difference]: Without dead ends: 10138 [2021-11-12 22:56:39,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:56:39,920 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 2617 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 3416 mSolverCounterSat, 654 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7300.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2693 SdHoareTripleChecker+Valid, 2406 SdHoareTripleChecker+Invalid, 4072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.57ms SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 3416 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7837.62ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:39,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2693 Valid, 2406 Invalid, 4072 Unknown, 0 Unchecked, 23.57ms Time], IncrementalHoareTripleChecker [654 Valid, 3416 Invalid, 2 Unknown, 0 Unchecked, 7837.62ms Time] [2021-11-12 22:56:39,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10138 states. [2021-11-12 22:56:40,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10138 to 9623. [2021-11-12 22:56:40,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9623 states, 7314 states have (on average 1.608695652173913) internal successors, (11766), 7716 states have internal predecessors, (11766), 1830 states have call successors, (1830), 380 states have call predecessors, (1830), 478 states have return successors, (2278), 1787 states have call predecessors, (2278), 1825 states have call successors, (2278) [2021-11-12 22:56:40,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9623 states to 9623 states and 15874 transitions. [2021-11-12 22:56:40,668 INFO L78 Accepts]: Start accepts. Automaton has 9623 states and 15874 transitions. Word has length 142 [2021-11-12 22:56:40,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:40,669 INFO L470 AbstractCegarLoop]: Abstraction has 9623 states and 15874 transitions. [2021-11-12 22:56:40,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.333333333333332) internal successors, (156), 9 states have internal predecessors, (156), 5 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 22:56:40,669 INFO L276 IsEmpty]: Start isEmpty. Operand 9623 states and 15874 transitions. [2021-11-12 22:56:40,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 22:56:40,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:40,673 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:40,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-12 22:56:40,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:40,886 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:40,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:40,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1240970883, now seen corresponding path program 1 times [2021-11-12 22:56:40,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:40,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121550072] [2021-11-12 22:56:40,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:40,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:40,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:40,889 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:40,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 22:56:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:41,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:56:41,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 22:56:41,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 22:56:42,788 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:42,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121550072] [2021-11-12 22:56:42,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121550072] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:42,789 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:42,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:56:42,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373772735] [2021-11-12 22:56:42,789 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:42,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:56:42,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:42,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:56:42,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:56:42,791 INFO L87 Difference]: Start difference. First operand 9623 states and 15874 transitions. Second operand has 13 states, 13 states have (on average 13.153846153846153) internal successors, (171), 11 states have internal predecessors, (171), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 9 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-12 22:56:44,813 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:46,818 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:54,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:54,106 INFO L93 Difference]: Finished difference Result 25655 states and 42730 transitions. [2021-11-12 22:56:54,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 22:56:54,107 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.153846153846153) internal successors, (171), 11 states have internal predecessors, (171), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 9 states have call predecessors, (26), 5 states have call successors, (26) Word has length 147 [2021-11-12 22:56:54,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:54,216 INFO L225 Difference]: With dead ends: 25655 [2021-11-12 22:56:54,217 INFO L226 Difference]: Without dead ends: 16944 [2021-11-12 22:56:54,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-12 22:56:54,254 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 2708 mSDsluCounter, 2269 mSDsCounter, 0 mSdLazyCounter, 5766 mSolverCounterSat, 724 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9269.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2779 SdHoareTripleChecker+Valid, 3127 SdHoareTripleChecker+Invalid, 6492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.70ms SdHoareTripleChecker+Time, 724 IncrementalHoareTripleChecker+Valid, 5766 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10119.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:54,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2779 Valid, 3127 Invalid, 6492 Unknown, 0 Unchecked, 29.70ms Time], IncrementalHoareTripleChecker [724 Valid, 5766 Invalid, 2 Unknown, 0 Unchecked, 10119.07ms Time] [2021-11-12 22:56:54,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16944 states. [2021-11-12 22:56:55,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16944 to 16870. [2021-11-12 22:56:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16870 states, 12813 states have (on average 1.6195270428471085) internal successors, (20751), 13480 states have internal predecessors, (20751), 3276 states have call successors, (3276), 684 states have call predecessors, (3276), 780 states have return successors, (3929), 3198 states have call predecessors, (3929), 3271 states have call successors, (3929) [2021-11-12 22:56:55,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16870 states to 16870 states and 27956 transitions. [2021-11-12 22:56:55,259 INFO L78 Accepts]: Start accepts. Automaton has 16870 states and 27956 transitions. Word has length 147 [2021-11-12 22:56:55,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:55,260 INFO L470 AbstractCegarLoop]: Abstraction has 16870 states and 27956 transitions. [2021-11-12 22:56:55,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.153846153846153) internal successors, (171), 11 states have internal predecessors, (171), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 9 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-12 22:56:55,260 INFO L276 IsEmpty]: Start isEmpty. Operand 16870 states and 27956 transitions. [2021-11-12 22:56:55,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 22:56:55,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:55,263 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:55,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:55,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:55,466 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:55,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:55,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1106957377, now seen corresponding path program 1 times [2021-11-12 22:56:55,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:55,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947642771] [2021-11-12 22:56:55,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:55,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:55,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:55,468 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:55,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 22:56:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:55,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:56:55,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 22:56:56,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 22:56:57,336 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:57,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947642771] [2021-11-12 22:56:57,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947642771] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:57,339 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:57,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:56:57,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334853693] [2021-11-12 22:56:57,339 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:57,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:56:57,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:57,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:56:57,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:56:57,341 INFO L87 Difference]: Start difference. First operand 16870 states and 27956 transitions. Second operand has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 5 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 9 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:56:59,360 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:01,367 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:03,372 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:10,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:10,635 INFO L93 Difference]: Finished difference Result 43060 states and 72271 transitions. [2021-11-12 22:57:10,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-12 22:57:10,637 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 5 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 9 states have call predecessors, (26), 4 states have call successors, (26) Word has length 147 [2021-11-12 22:57:10,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:10,850 INFO L225 Difference]: With dead ends: 43060 [2021-11-12 22:57:10,850 INFO L226 Difference]: Without dead ends: 25676 [2021-11-12 22:57:10,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:57:10,945 INFO L933 BasicCegarLoop]: 958 mSDtfsCounter, 2518 mSDsluCounter, 2180 mSDsCounter, 0 mSdLazyCounter, 4751 mSolverCounterSat, 674 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10828.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2610 SdHoareTripleChecker+Valid, 3138 SdHoareTripleChecker+Invalid, 5428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.54ms SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 4751 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11650.89ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:10,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2610 Valid, 3138 Invalid, 5428 Unknown, 0 Unchecked, 25.54ms Time], IncrementalHoareTripleChecker [674 Valid, 4751 Invalid, 3 Unknown, 0 Unchecked, 11650.89ms Time] [2021-11-12 22:57:10,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25676 states. [2021-11-12 22:57:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25676 to 24384. [2021-11-12 22:57:12,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24384 states, 18455 states have (on average 1.6145759956651313) internal successors, (29797), 19507 states have internal predecessors, (29797), 4804 states have call successors, (4804), 1017 states have call predecessors, (4804), 1124 states have return successors, (5821), 4584 states have call predecessors, (5821), 4799 states have call successors, (5821) [2021-11-12 22:57:12,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24384 states to 24384 states and 40422 transitions. [2021-11-12 22:57:12,789 INFO L78 Accepts]: Start accepts. Automaton has 24384 states and 40422 transitions. Word has length 147 [2021-11-12 22:57:12,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:12,790 INFO L470 AbstractCegarLoop]: Abstraction has 24384 states and 40422 transitions. [2021-11-12 22:57:12,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 5 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 9 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:57:12,790 INFO L276 IsEmpty]: Start isEmpty. Operand 24384 states and 40422 transitions. [2021-11-12 22:57:12,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-12 22:57:12,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:12,794 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:12,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:13,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:13,014 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:13,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:13,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1555577297, now seen corresponding path program 1 times [2021-11-12 22:57:13,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:13,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999826242] [2021-11-12 22:57:13,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:13,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:13,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:13,016 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:13,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 22:57:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:13,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:57:13,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:57:13,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:57:14,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:14,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999826242] [2021-11-12 22:57:14,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999826242] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:57:14,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2102669803] [2021-11-12 22:57:14,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:14,452 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:57:14,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:57:14,455 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:57:14,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-12 22:57:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:14,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:57:14,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:57:15,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:57:15,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2102669803] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:57:15,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364804418] [2021-11-12 22:57:15,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:15,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:57:15,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:57:15,963 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:57:15,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-12 22:57:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:16,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:57:16,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:57:16,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:57:17,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364804418] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:57:17,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:57:17,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 5, 5, 5] total 9 [2021-11-12 22:57:17,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568648029] [2021-11-12 22:57:17,330 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:57:17,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:57:17,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:17,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:57:17,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:57:17,331 INFO L87 Difference]: Start difference. First operand 24384 states and 40422 transitions. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 6 states have call successors, (23), 4 states have call predecessors, (23), 7 states have return successors, (24), 8 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-12 22:57:19,361 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:21,367 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:30,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:30,249 INFO L93 Difference]: Finished difference Result 98122 states and 163934 transitions. [2021-11-12 22:57:30,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:57:30,250 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 6 states have call successors, (23), 4 states have call predecessors, (23), 7 states have return successors, (24), 8 states have call predecessors, (24), 5 states have call successors, (24) Word has length 148 [2021-11-12 22:57:30,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:30,766 INFO L225 Difference]: With dead ends: 98122 [2021-11-12 22:57:30,766 INFO L226 Difference]: Without dead ends: 73816 [2021-11-12 22:57:30,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 877 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:57:30,850 INFO L933 BasicCegarLoop]: 942 mSDtfsCounter, 2776 mSDsluCounter, 1689 mSDsCounter, 0 mSdLazyCounter, 4406 mSolverCounterSat, 855 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8156.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2854 SdHoareTripleChecker+Valid, 2631 SdHoareTripleChecker+Invalid, 5263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.62ms SdHoareTripleChecker+Time, 855 IncrementalHoareTripleChecker+Valid, 4406 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8806.75ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:30,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2854 Valid, 2631 Invalid, 5263 Unknown, 0 Unchecked, 24.62ms Time], IncrementalHoareTripleChecker [855 Valid, 4406 Invalid, 2 Unknown, 0 Unchecked, 8806.75ms Time] [2021-11-12 22:57:30,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73816 states. [2021-11-12 22:57:36,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73816 to 73418. [2021-11-12 22:57:36,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73418 states, 55598 states have (on average 1.6100219432353682) internal successors, (89514), 58821 states have internal predecessors, (89514), 14356 states have call successors, (14356), 3053 states have call predecessors, (14356), 3463 states have return successors, (18351), 13718 states have call predecessors, (18351), 14351 states have call successors, (18351) [2021-11-12 22:57:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73418 states to 73418 states and 122221 transitions. [2021-11-12 22:57:36,873 INFO L78 Accepts]: Start accepts. Automaton has 73418 states and 122221 transitions. Word has length 148 [2021-11-12 22:57:36,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:36,874 INFO L470 AbstractCegarLoop]: Abstraction has 73418 states and 122221 transitions. [2021-11-12 22:57:36,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 6 states have call successors, (23), 4 states have call predecessors, (23), 7 states have return successors, (24), 8 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-12 22:57:36,874 INFO L276 IsEmpty]: Start isEmpty. Operand 73418 states and 122221 transitions. [2021-11-12 22:57:36,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-12 22:57:36,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:36,879 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:57:36,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:37,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:37,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2021-11-12 22:57:37,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:57:37,490 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:37,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:37,491 INFO L85 PathProgramCache]: Analyzing trace with hash 278387331, now seen corresponding path program 1 times [2021-11-12 22:57:37,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:37,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076090404] [2021-11-12 22:57:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:37,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:37,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:37,493 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:37,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-12 22:57:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:38,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:57:38,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:57:38,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 22:57:38,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:38,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076090404] [2021-11-12 22:57:38,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076090404] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:38,708 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:38,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:57:38,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219227561] [2021-11-12 22:57:38,709 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:38,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:57:38,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:38,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:57:38,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:57:38,711 INFO L87 Difference]: Start difference. First operand 73418 states and 122221 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 6 states have internal predecessors, (129), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-12 22:57:40,741 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:42,749 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:51,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:51,500 INFO L93 Difference]: Finished difference Result 173018 states and 288667 transitions. [2021-11-12 22:57:51,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:57:51,501 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 6 states have internal predecessors, (129), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) Word has length 151 [2021-11-12 22:57:51,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:52,342 INFO L225 Difference]: With dead ends: 173018 [2021-11-12 22:57:52,342 INFO L226 Difference]: Without dead ends: 102211 [2021-11-12 22:57:52,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:57:52,812 INFO L933 BasicCegarLoop]: 993 mSDtfsCounter, 469 mSDsluCounter, 4185 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5026.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 5178 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.16ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5270.68ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:52,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 5178 Invalid, 540 Unknown, 0 Unchecked, 10.16ms Time], IncrementalHoareTripleChecker [18 Valid, 520 Invalid, 2 Unknown, 0 Unchecked, 5270.68ms Time] [2021-11-12 22:57:52,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102211 states. [2021-11-12 22:57:59,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102211 to 100501. [2021-11-12 22:57:59,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100501 states, 76905 states have (on average 1.5657109420713868) internal successors, (120411), 80684 states have internal predecessors, (120411), 18218 states have call successors, (18218), 4748 states have call predecessors, (18218), 5377 states have return successors, (26764), 17243 states have call predecessors, (26764), 18213 states have call successors, (26764) [2021-11-12 22:58:00,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100501 states to 100501 states and 165393 transitions. [2021-11-12 22:58:00,829 INFO L78 Accepts]: Start accepts. Automaton has 100501 states and 165393 transitions. Word has length 151 [2021-11-12 22:58:00,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:00,830 INFO L470 AbstractCegarLoop]: Abstraction has 100501 states and 165393 transitions. [2021-11-12 22:58:00,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 6 states have internal predecessors, (129), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-12 22:58:00,830 INFO L276 IsEmpty]: Start isEmpty. Operand 100501 states and 165393 transitions. [2021-11-12 22:58:00,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-12 22:58:00,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:00,834 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:58:00,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:01,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:01,035 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:01,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:01,035 INFO L85 PathProgramCache]: Analyzing trace with hash 957659585, now seen corresponding path program 1 times [2021-11-12 22:58:01,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:01,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [471105397] [2021-11-12 22:58:01,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:01,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:01,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:01,037 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:01,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86392f4-11cd-41fe-90b4-b0027f7784c5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-12 22:58:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:01,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:58:01,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:58:02,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 22:58:02,883 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:02,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [471105397] [2021-11-12 22:58:02,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [471105397] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:58:02,883 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:58:02,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 8 [2021-11-12 22:58:02,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473094653] [2021-11-12 22:58:02,884 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:02,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:58:02,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:02,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:58:02,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:58:02,886 INFO L87 Difference]: Start difference. First operand 100501 states and 165393 transitions. Second operand has 8 states, 8 states have (on average 24.5) internal successors, (196), 8 states have internal predecessors, (196), 8 states have call successors, (31), 6 states have call predecessors, (31), 5 states have return successors, (30), 8 states have call predecessors, (30), 7 states have call successors, (30) [2021-11-12 22:58:04,912 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:06,919 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []