./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH --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 0b79f6e49ac032444452c6675a01007f08f3b698920d88701561807a0669494d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:01:01,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:01:01,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:01:01,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:01:01,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:01:01,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:01:01,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:01:01,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:01:01,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:01:01,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:01:01,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:01:01,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:01:01,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:01:01,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:01:01,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:01:01,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:01:01,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:01:01,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:01:01,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:01:01,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:01:01,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:01:01,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:01:01,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:01:01,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:01:01,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:01:01,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:01:01,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:01:01,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:01:01,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:01:01,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:01:01,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:01:01,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:01:01,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:01:01,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:01:01,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:01:01,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:01:01,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:01:01,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:01:01,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:01:01,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:01:01,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:01:01,218 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:01:01,251 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:01:01,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:01:01,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:01:01,252 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:01:01,252 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:01:01,253 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:01:01,253 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:01:01,253 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:01:01,253 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:01:01,253 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:01:01,254 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:01:01,254 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:01:01,254 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:01:01,254 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:01:01,255 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:01:01,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:01:01,256 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:01:01,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:01:01,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:01:01,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:01:01,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:01:01,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:01:01,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:01:01,257 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:01:01,257 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:01:01,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:01:01,257 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:01:01,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:01:01,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:01:01,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:01:01,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:01:01,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:01:01,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:01:01,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:01:01,262 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:01:01,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:01:01,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:01:01,264 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:01:01,264 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:01:01,264 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_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b79f6e49ac032444452c6675a01007f08f3b698920d88701561807a0669494d [2021-11-03 04:01:01,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:01:01,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:01:01,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:01:01,619 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:01:01,620 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:01:01,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2021-11-03 04:01:01,687 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/data/73add7ca5/ecad6b6c74df4dd7a6bd3dd7f08a0111/FLAGc29a37178 [2021-11-03 04:01:02,395 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:01:02,396 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2021-11-03 04:01:02,416 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/data/73add7ca5/ecad6b6c74df4dd7a6bd3dd7f08a0111/FLAGc29a37178 [2021-11-03 04:01:02,556 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/data/73add7ca5/ecad6b6c74df4dd7a6bd3dd7f08a0111 [2021-11-03 04:01:02,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:01:02,569 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:01:02,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:01:02,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:01:02,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:01:02,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:01:02" (1/1) ... [2021-11-03 04:01:02,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77be9fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:02, skipping insertion in model container [2021-11-03 04:01:02,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:01:02" (1/1) ... [2021-11-03 04:01:02,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:01:02,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:01:03,116 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_be0e6b62-c342-4d44-8802-779a55a7ced4/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c[77378,77391] [2021-11-03 04:01:03,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:01:03,144 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) [2021-11-03 04:01:03,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@41ad9d89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:03, skipping insertion in model container [2021-11-03 04:01:03,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:01:03,145 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:01:03,148 INFO L168 Benchmark]: Toolchain (without parser) took 577.43 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 52.2 MB in the beginning and 77.7 MB in the end (delta: -25.5 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. [2021-11-03 04:01:03,148 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 92.3 MB. Free memory is still 71.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:01:03,150 INFO L168 Benchmark]: CACSL2BoogieTranslator took 572.68 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 52.0 MB in the beginning and 77.7 MB in the end (delta: -25.6 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. [2021-11-03 04:01:03,152 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 92.3 MB. Free memory is still 71.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 572.68 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 52.0 MB in the beginning and 77.7 MB in the end (delta: -25.6 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1050]: 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_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH --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 0b79f6e49ac032444452c6675a01007f08f3b698920d88701561807a0669494d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:01:05,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:01:05,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:01:05,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:01:05,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:01:05,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:01:05,597 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:01:05,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:01:05,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:01:05,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:01:05,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:01:05,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:01:05,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:01:05,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:01:05,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:01:05,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:01:05,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:01:05,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:01:05,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:01:05,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:01:05,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:01:05,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:01:05,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:01:05,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:01:05,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:01:05,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:01:05,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:01:05,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:01:05,674 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:01:05,675 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:01:05,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:01:05,677 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:01:05,679 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:01:05,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:01:05,682 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:01:05,682 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:01:05,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:01:05,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:01:05,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:01:05,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:01:05,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:01:05,688 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:01:05,736 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:01:05,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:01:05,738 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:01:05,738 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:01:05,738 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:01:05,738 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:01:05,739 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:01:05,739 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:01:05,739 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:01:05,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:01:05,740 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:01:05,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:01:05,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:01:05,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:01:05,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:01:05,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:01:05,741 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:01:05,742 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:01:05,742 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:01:05,742 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:01:05,742 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:01:05,742 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:01:05,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:01:05,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:01:05,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:01:05,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:01:05,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:01:05,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:01:05,747 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:01:05,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:01:05,748 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:01:05,748 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:01:05,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:01:05,748 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:01:05,749 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:01:05,749 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_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b79f6e49ac032444452c6675a01007f08f3b698920d88701561807a0669494d [2021-11-03 04:01:06,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:01:06,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:01:06,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:01:06,159 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:01:06,159 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:01:06,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2021-11-03 04:01:06,256 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/data/9851fc0df/15b0a3011de840e9a6ae0bffa7c1b17a/FLAG7de922f2a [2021-11-03 04:01:07,180 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:01:07,181 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2021-11-03 04:01:07,218 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/data/9851fc0df/15b0a3011de840e9a6ae0bffa7c1b17a/FLAG7de922f2a [2021-11-03 04:01:07,268 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/data/9851fc0df/15b0a3011de840e9a6ae0bffa7c1b17a [2021-11-03 04:01:07,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:01:07,273 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:01:07,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:01:07,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:01:07,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:01:07,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:01:07" (1/1) ... [2021-11-03 04:01:07,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@400df233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:07, skipping insertion in model container [2021-11-03 04:01:07,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:01:07" (1/1) ... [2021-11-03 04:01:07,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:01:07,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:01:07,894 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_be0e6b62-c342-4d44-8802-779a55a7ced4/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c[77378,77391] [2021-11-03 04:01:07,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:01:07,928 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:01:07,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:01:08,143 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_be0e6b62-c342-4d44-8802-779a55a7ced4/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c[77378,77391] [2021-11-03 04:01:08,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:01:08,154 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:01:08,304 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_be0e6b62-c342-4d44-8802-779a55a7ced4/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c[77378,77391] [2021-11-03 04:01:08,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:01:08,330 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:01:08,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:08 WrapperNode [2021-11-03 04:01:08,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:01:08,332 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:01:08,332 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:01:08,332 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:01:08,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:08" (1/1) ... [2021-11-03 04:01:08,385 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:08" (1/1) ... [2021-11-03 04:01:08,471 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:01:08,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:01:08,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:01:08,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:01:08,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:08" (1/1) ... [2021-11-03 04:01:08,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:08" (1/1) ... [2021-11-03 04:01:08,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:08" (1/1) ... [2021-11-03 04:01:08,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:08" (1/1) ... [2021-11-03 04:01:08,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:08" (1/1) ... [2021-11-03 04:01:08,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:08" (1/1) ... [2021-11-03 04:01:08,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:08" (1/1) ... [2021-11-03 04:01:08,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:01:08,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:01:08,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:01:08,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:01:08,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:08" (1/1) ... [2021-11-03 04:01:08,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:01:08,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:01:08,641 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:01:08,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:01:08,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:01:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:01:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:01:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:01:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:01:08,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:01:08,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:01:08,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:01:08,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:01:08,881 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-03 04:01:17,639 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-03 04:01:17,640 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-03 04:01:17,648 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:01:17,648 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-03 04:01:17,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:01:17 BoogieIcfgContainer [2021-11-03 04:01:17,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:01:17,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:01:17,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:01:17,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:01:17,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:01:07" (1/3) ... [2021-11-03 04:01:17,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33dae3d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:01:17, skipping insertion in model container [2021-11-03 04:01:17,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:08" (2/3) ... [2021-11-03 04:01:17,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33dae3d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:01:17, skipping insertion in model container [2021-11-03 04:01:17,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:01:17" (3/3) ... [2021-11-03 04:01:17,662 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.16.i.cil-1.c [2021-11-03 04:01:17,673 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:01:17,673 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:01:17,729 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:01:17,736 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 [2021-11-03 04:01:17,736 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:01:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 156 states have (on average 1.7307692307692308) internal successors, (270), 157 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:01:17,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-03 04:01:17,766 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:01:17,767 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:01:17,768 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:01:17,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:01:17,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1590777092, now seen corresponding path program 1 times [2021-11-03 04:01:17,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:01:17,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781783130] [2021-11-03 04:01:17,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:01:17,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:01:17,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:01:17,797 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:01:17,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:01:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:01:18,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 04:01:18,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:01:18,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 04:01:18,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 04:01:18,609 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:01:18,613 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-03 04:01:18,622 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:01:18,625 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-03 04:01:18,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-03 04:01:19,248 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-03 04:01:19,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 717 treesize of output 669 [2021-11-03 04:01:19,319 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:01:19,322 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-03 04:01:19,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 210 [2021-11-03 04:01:19,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 101 [2021-11-03 04:01:19,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-03 04:01:19,633 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-03 04:01:19,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-03 04:01:19,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:19,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-03 04:01:19,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-03 04:01:19,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-03 04:01:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:01:19,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:01:20,176 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:01:20,179 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-03 04:01:20,186 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:01:20,189 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-03 04:01:20,375 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:01:20,378 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-03 04:01:20,387 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:01:20,391 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-03 04:01:20,405 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:01:20,409 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-03 04:01:20,427 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:01:20,431 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-03 04:01:20,462 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:01:20,467 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-03 04:01:20,496 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:01:20,502 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-03 04:01:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:01:21,094 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:01:21,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781783130] [2021-11-03 04:01:21,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781783130] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:01:21,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:01:21,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:01:21,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162942170] [2021-11-03 04:01:21,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:01:21,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:01:21,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:01:21,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:01:21,119 INFO L87 Difference]: Start difference. First operand has 158 states, 156 states have (on average 1.7307692307692308) internal successors, (270), 157 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:01:43,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:01:43,925 INFO L93 Difference]: Finished difference Result 317 states and 539 transitions. [2021-11-03 04:01:43,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:01:43,928 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-03 04:01:43,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:01:43,938 INFO L225 Difference]: With dead ends: 317 [2021-11-03 04:01:43,939 INFO L226 Difference]: Without dead ends: 145 [2021-11-03 04:01:43,942 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:01:43,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-03 04:01:43,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-03 04:01:43,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5625) internal successors, (225), 144 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:01:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 225 transitions. [2021-11-03 04:01:43,983 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 225 transitions. Word has length 45 [2021-11-03 04:01:43,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:01:43,984 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 225 transitions. [2021-11-03 04:01:43,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:01:43,984 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 225 transitions. [2021-11-03 04:01:43,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-03 04:01:43,987 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:01:43,987 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:01:44,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:01:44,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:01:44,201 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:01:44,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:01:44,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1806796926, now seen corresponding path program 1 times [2021-11-03 04:01:44,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:01:44,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410458398] [2021-11-03 04:01:44,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:01:44,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:01:44,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:01:44,205 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:01:44,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:01:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:01:44,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:01:44,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:01:44,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:44,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:44,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:44,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:44,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:01:44,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:01:45,135 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:01:45,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:01:48,689 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:01:48,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:01:56,661 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:01:56,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:01:56,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:01:56,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:02:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:02:05,105 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:02:05,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410458398] [2021-11-03 04:02:05,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410458398] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:02:05,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:02:05,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-03 04:02:05,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660277526] [2021-11-03 04:02:05,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:02:05,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:02:05,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:02:05,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-03 04:02:05,109 INFO L87 Difference]: Start difference. First operand 145 states and 225 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:02:29,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:02:29,613 INFO L93 Difference]: Finished difference Result 308 states and 478 transitions. [2021-11-03 04:02:29,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:02:29,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-03 04:02:29,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:02:29,618 INFO L225 Difference]: With dead ends: 308 [2021-11-03 04:02:29,618 INFO L226 Difference]: Without dead ends: 173 [2021-11-03 04:02:29,635 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=18, Invalid=21, Unknown=3, NotChecked=0, Total=42 [2021-11-03 04:02:29,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-03 04:02:29,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 156. [2021-11-03 04:02:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.5741935483870968) internal successors, (244), 155 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:02:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 244 transitions. [2021-11-03 04:02:29,646 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 244 transitions. Word has length 45 [2021-11-03 04:02:29,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:02:29,647 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 244 transitions. [2021-11-03 04:02:29,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:02:29,647 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 244 transitions. [2021-11-03 04:02:29,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 04:02:29,649 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:02:29,649 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:02:29,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:02:29,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:02:29,850 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:02:29,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:02:29,850 INFO L85 PathProgramCache]: Analyzing trace with hash 774668882, now seen corresponding path program 1 times [2021-11-03 04:02:29,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:02:29,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686190826] [2021-11-03 04:02:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:02:29,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:02:29,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:02:29,857 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:02:29,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:02:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:02:30,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:02:30,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:02:30,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:02:30,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:02:30,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:02:30,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:02:30,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:02:30,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:02:30,792 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:02:30,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:02:34,037 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:02:34,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:02:41,497 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:02:41,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:02:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:02:41,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:02:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:02:42,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:02:42,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686190826] [2021-11-03 04:02:42,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686190826] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:02:42,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:02:42,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:02:42,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998332610] [2021-11-03 04:02:42,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:02:42,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:02:42,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:02:42,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:02:42,035 INFO L87 Difference]: Start difference. First operand 156 states and 244 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:21,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:03:21,569 INFO L93 Difference]: Finished difference Result 433 states and 675 transitions. [2021-11-03 04:03:21,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:03:21,570 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-03 04:03:21,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:03:21,573 INFO L225 Difference]: With dead ends: 433 [2021-11-03 04:03:21,574 INFO L226 Difference]: Without dead ends: 298 [2021-11-03 04:03:21,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:03:21,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-03 04:03:21,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 172. [2021-11-03 04:03:21,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.5730994152046784) internal successors, (269), 171 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:21,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 269 transitions. [2021-11-03 04:03:21,594 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 269 transitions. Word has length 58 [2021-11-03 04:03:21,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:03:21,595 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 269 transitions. [2021-11-03 04:03:21,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:21,595 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 269 transitions. [2021-11-03 04:03:21,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:03:21,598 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:03:21,598 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:03:21,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:03:21,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:03:21,811 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:03:21,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:03:21,814 INFO L85 PathProgramCache]: Analyzing trace with hash -713896793, now seen corresponding path program 1 times [2021-11-03 04:03:21,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:03:21,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685621900] [2021-11-03 04:03:21,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:03:21,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:03:21,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:03:21,817 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:03:21,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:03:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:03:22,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:03:22,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:03:22,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:03:22,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:03:22,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:03:22,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:03:22,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:03:22,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:03:22,967 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:03:22,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:03:26,271 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:03:26,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:03:32,969 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:03:32,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:03:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:33,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:03:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:33,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:03:33,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685621900] [2021-11-03 04:03:33,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685621900] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:03:33,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:03:33,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:03:33,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959792289] [2021-11-03 04:03:33,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:03:33,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:03:33,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:03:33,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:03:33,445 INFO L87 Difference]: Start difference. First operand 172 states and 269 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:11,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:04:11,378 INFO L93 Difference]: Finished difference Result 463 states and 724 transitions. [2021-11-03 04:04:11,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:04:11,379 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 04:04:11,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:04:11,381 INFO L225 Difference]: With dead ends: 463 [2021-11-03 04:04:11,381 INFO L226 Difference]: Without dead ends: 312 [2021-11-03 04:04:11,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:04:11,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-03 04:04:11,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 183. [2021-11-03 04:04:11,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.554945054945055) internal successors, (283), 182 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:11,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 283 transitions. [2021-11-03 04:04:11,410 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 283 transitions. Word has length 59 [2021-11-03 04:04:11,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:04:11,410 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 283 transitions. [2021-11-03 04:04:11,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:11,411 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 283 transitions. [2021-11-03 04:04:11,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:04:11,413 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:04:11,413 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:04:11,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:04:11,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:04:11,614 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:04:11,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:04:11,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1173006651, now seen corresponding path program 1 times [2021-11-03 04:04:11,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:04:11,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566929879] [2021-11-03 04:04:11,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:04:11,615 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:04:11,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:04:11,616 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:04:11,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:04:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:04:12,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:04:12,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:04:12,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:04:12,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:04:12,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:04:12,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:04:12,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:04:12,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:04:12,718 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:04:12,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:04:15,876 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:04:15,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:04:22,684 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:04:22,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:04:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:04:22,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:04:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:04:23,227 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:04:23,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566929879] [2021-11-03 04:04:23,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566929879] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:04:23,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:04:23,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:04:23,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298366887] [2021-11-03 04:04:23,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:04:23,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:04:23,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:04:23,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:04:23,229 INFO L87 Difference]: Start difference. First operand 183 states and 283 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:54,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:04:54,586 INFO L93 Difference]: Finished difference Result 476 states and 738 transitions. [2021-11-03 04:04:54,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:04:54,589 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 04:04:54,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:04:54,590 INFO L225 Difference]: With dead ends: 476 [2021-11-03 04:04:54,591 INFO L226 Difference]: Without dead ends: 314 [2021-11-03 04:04:54,591 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:04:54,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-03 04:04:54,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 196. [2021-11-03 04:04:54,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.5384615384615385) internal successors, (300), 195 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:54,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 300 transitions. [2021-11-03 04:04:54,604 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 300 transitions. Word has length 59 [2021-11-03 04:04:54,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:04:54,605 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 300 transitions. [2021-11-03 04:04:54,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:54,605 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 300 transitions. [2021-11-03 04:04:54,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:04:54,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:04:54,608 INFO L513 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] [2021-11-03 04:04:54,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:04:54,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:04:54,823 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:04:54,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:04:54,824 INFO L85 PathProgramCache]: Analyzing trace with hash 320889874, now seen corresponding path program 1 times [2021-11-03 04:04:54,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:04:54,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258412072] [2021-11-03 04:04:54,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:04:54,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:04:54,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:04:54,825 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:04:54,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:04:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:04:55,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:04:55,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:04:55,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:04:55,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:04:55,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:04:55,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:04:55,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:04:55,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:04:55,936 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:04:55,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:04:59,211 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:04:59,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:05:06,698 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:05:06,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:05:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:05:06,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:05:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:05:07,186 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:05:07,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258412072] [2021-11-03 04:05:07,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258412072] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:05:07,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:05:07,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:05:07,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775648265] [2021-11-03 04:05:07,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:05:07,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:05:07,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:05:07,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:05:07,188 INFO L87 Difference]: Start difference. First operand 196 states and 300 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:05:46,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:05:46,037 INFO L93 Difference]: Finished difference Result 497 states and 767 transitions. [2021-11-03 04:05:46,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:05:46,039 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 04:05:46,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:05:46,042 INFO L225 Difference]: With dead ends: 497 [2021-11-03 04:05:46,042 INFO L226 Difference]: Without dead ends: 322 [2021-11-03 04:05:46,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:05:46,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-03 04:05:46,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 202. [2021-11-03 04:05:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.5422885572139304) internal successors, (310), 201 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:05:46,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 310 transitions. [2021-11-03 04:05:46,054 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 310 transitions. Word has length 59 [2021-11-03 04:05:46,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:05:46,055 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 310 transitions. [2021-11-03 04:05:46,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:05:46,055 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 310 transitions. [2021-11-03 04:05:46,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:05:46,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:05:46,057 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:05:46,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-03 04:05:46,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:05:46,271 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:05:46,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:05:46,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1682330414, now seen corresponding path program 1 times [2021-11-03 04:05:46,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:05:46,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887468074] [2021-11-03 04:05:46,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:05:46,273 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:05:46,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:05:46,273 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:05:46,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:05:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:05:47,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:05:47,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:05:47,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:05:47,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:05:47,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:05:47,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:05:47,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:05:47,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:05:47,421 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:05:47,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:05:50,766 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:05:50,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:05:58,268 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:05:58,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:05:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:05:58,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:05:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:05:58,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:05:58,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887468074] [2021-11-03 04:05:58,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887468074] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:05:58,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:05:58,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:05:58,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679680954] [2021-11-03 04:05:58,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:05:58,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:05:58,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:05:58,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:05:58,761 INFO L87 Difference]: Start difference. First operand 202 states and 310 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:06:47,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:06:47,134 INFO L93 Difference]: Finished difference Result 517 states and 796 transitions. [2021-11-03 04:06:47,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:06:47,135 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 04:06:47,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:06:47,137 INFO L225 Difference]: With dead ends: 517 [2021-11-03 04:06:47,138 INFO L226 Difference]: Without dead ends: 336 [2021-11-03 04:06:47,138 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:06:47,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-03 04:06:47,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 216. [2021-11-03 04:06:47,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.5255813953488373) internal successors, (328), 215 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:06:47,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 328 transitions. [2021-11-03 04:06:47,149 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 328 transitions. Word has length 59 [2021-11-03 04:06:47,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:06:47,150 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 328 transitions. [2021-11-03 04:06:47,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:06:47,150 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 328 transitions. [2021-11-03 04:06:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:06:47,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:06:47,151 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:06:47,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:06:47,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:06:47,366 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:06:47,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:06:47,367 INFO L85 PathProgramCache]: Analyzing trace with hash -295545004, now seen corresponding path program 1 times [2021-11-03 04:06:47,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:06:47,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838618967] [2021-11-03 04:06:47,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:06:47,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:06:47,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:06:47,369 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:06:47,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:06:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:06:48,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:06:48,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:06:48,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:06:48,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:06:48,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:06:48,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:06:48,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:06:48,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:06:48,587 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:06:48,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:06:51,937 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:06:51,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:06:59,464 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:06:59,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:06:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:06:59,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:06:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:06:59,985 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:06:59,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838618967] [2021-11-03 04:06:59,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838618967] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:06:59,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:06:59,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:06:59,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984275983] [2021-11-03 04:06:59,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:06:59,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:06:59,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:06:59,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:06:59,986 INFO L87 Difference]: Start difference. First operand 216 states and 328 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:07:50,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:07:50,139 INFO L93 Difference]: Finished difference Result 515 states and 791 transitions. [2021-11-03 04:07:50,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:07:50,141 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 04:07:50,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:07:50,144 INFO L225 Difference]: With dead ends: 515 [2021-11-03 04:07:50,144 INFO L226 Difference]: Without dead ends: 334 [2021-11-03 04:07:50,145 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:07:50,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-03 04:07:50,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 202. [2021-11-03 04:07:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.5323383084577114) internal successors, (308), 201 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:07:50,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 308 transitions. [2021-11-03 04:07:50,157 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 308 transitions. Word has length 59 [2021-11-03 04:07:50,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:07:50,157 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 308 transitions. [2021-11-03 04:07:50,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:07:50,158 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 308 transitions. [2021-11-03 04:07:50,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:07:50,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:07:50,159 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:07:50,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:07:50,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:07:50,375 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:07:50,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:07:50,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1666972293, now seen corresponding path program 1 times [2021-11-03 04:07:50,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:07:50,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900420052] [2021-11-03 04:07:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:07:50,377 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:07:50,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:07:50,378 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:07:50,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:07:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:07:51,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:07:51,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:07:51,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:07:51,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:07:51,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:07:51,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:07:51,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:07:51,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:07:51,862 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:07:51,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:07:55,228 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:07:55,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:08:02,214 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:08:02,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:08:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:02,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:08:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:02,742 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:08:02,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900420052] [2021-11-03 04:08:02,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900420052] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:02,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:02,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:08:02,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005195073] [2021-11-03 04:08:02,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:08:02,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:08:02,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:08:02,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:08:02,743 INFO L87 Difference]: Start difference. First operand 202 states and 308 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:44,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:44,470 INFO L93 Difference]: Finished difference Result 517 states and 792 transitions. [2021-11-03 04:08:44,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:08:44,472 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 04:08:44,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:44,474 INFO L225 Difference]: With dead ends: 517 [2021-11-03 04:08:44,474 INFO L226 Difference]: Without dead ends: 336 [2021-11-03 04:08:44,475 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:08:44,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-03 04:08:44,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 227. [2021-11-03 04:08:44,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.5132743362831858) internal successors, (342), 226 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 342 transitions. [2021-11-03 04:08:44,486 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 342 transitions. Word has length 60 [2021-11-03 04:08:44,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:44,487 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 342 transitions. [2021-11-03 04:08:44,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:44,487 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 342 transitions. [2021-11-03 04:08:44,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 04:08:44,488 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:44,488 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:08:44,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:08:44,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:08:44,703 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:08:44,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:44,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1752756352, now seen corresponding path program 1 times [2021-11-03 04:08:44,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:08:44,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144854556] [2021-11-03 04:08:44,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:44,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:08:44,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:08:44,705 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:08:44,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:08:45,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:45,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:08:45,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:08:45,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:08:45,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:08:45,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:08:45,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:08:45,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:08:45,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:08:46,023 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:08:46,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:08:49,305 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:08:49,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:08:56,430 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:08:56,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:08:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:56,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:08:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:56,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:08:56,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144854556] [2021-11-03 04:08:56,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144854556] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:56,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:56,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:08:56,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225781100] [2021-11-03 04:08:56,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:08:56,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:08:56,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:08:56,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:08:56,902 INFO L87 Difference]: Start difference. First operand 227 states and 342 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:35,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:09:35,686 INFO L93 Difference]: Finished difference Result 543 states and 826 transitions. [2021-11-03 04:09:35,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:09:35,687 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-03 04:09:35,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:09:35,690 INFO L225 Difference]: With dead ends: 543 [2021-11-03 04:09:35,690 INFO L226 Difference]: Without dead ends: 337 [2021-11-03 04:09:35,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:09:35,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-11-03 04:09:35,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 229. [2021-11-03 04:09:35,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.5043859649122806) internal successors, (343), 228 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:35,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 343 transitions. [2021-11-03 04:09:35,702 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 343 transitions. Word has length 61 [2021-11-03 04:09:35,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:09:35,702 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 343 transitions. [2021-11-03 04:09:35,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:35,703 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 343 transitions. [2021-11-03 04:09:35,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-03 04:09:35,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:09:35,704 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:09:35,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:09:35,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:09:35,907 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:09:35,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:09:35,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1654924640, now seen corresponding path program 1 times [2021-11-03 04:09:35,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:09:35,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467561907] [2021-11-03 04:09:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:09:35,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:09:35,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:09:35,910 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:09:35,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:09:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:09:36,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:09:36,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:09:36,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:09:36,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:09:36,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:09:36,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:09:36,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:09:36,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:09:37,355 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:09:37,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:09:40,706 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:09:40,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:09:47,847 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:09:47,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:09:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:48,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:09:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:48,367 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:09:48,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467561907] [2021-11-03 04:09:48,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467561907] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:09:48,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:09:48,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:09:48,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776052979] [2021-11-03 04:09:48,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:09:48,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:09:48,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:09:48,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:09:48,370 INFO L87 Difference]: Start difference. First operand 229 states and 343 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:32,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:10:32,447 INFO L93 Difference]: Finished difference Result 561 states and 849 transitions. [2021-11-03 04:10:32,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:10:32,449 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-03 04:10:32,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:10:32,452 INFO L225 Difference]: With dead ends: 561 [2021-11-03 04:10:32,452 INFO L226 Difference]: Without dead ends: 353 [2021-11-03 04:10:32,453 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:10:32,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-03 04:10:32,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 241. [2021-11-03 04:10:32,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.4791666666666667) internal successors, (355), 240 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2021-11-03 04:10:32,467 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 62 [2021-11-03 04:10:32,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:10:32,468 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2021-11-03 04:10:32,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:32,468 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2021-11-03 04:10:32,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-03 04:10:32,470 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:10:32,470 INFO L513 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] [2021-11-03 04:10:32,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:10:32,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:10:32,683 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:10:32,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:10:32,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1043051208, now seen corresponding path program 1 times [2021-11-03 04:10:32,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:10:32,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672450502] [2021-11-03 04:10:32,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:32,685 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:10:32,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:10:32,686 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:10:32,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:10:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:33,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:10:33,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:10:33,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:33,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:33,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:33,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:33,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:33,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:33,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:33,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:33,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:33,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:33,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:33,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:33,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:33,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:10:33,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:10:33,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:10:33,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:10:33,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:10:34,222 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:10:34,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-03 04:10:35,450 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:10:35,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-03 04:10:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:35,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:10:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:35,828 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:10:35,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672450502] [2021-11-03 04:10:35,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672450502] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:10:35,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:10:35,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:10:35,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223702359] [2021-11-03 04:10:35,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:10:35,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:10:35,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:10:35,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:10:35,831 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:45,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:10:45,621 INFO L93 Difference]: Finished difference Result 478 states and 712 transitions. [2021-11-03 04:10:45,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:10:45,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-03 04:10:45,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:10:45,624 INFO L225 Difference]: With dead ends: 478 [2021-11-03 04:10:45,624 INFO L226 Difference]: Without dead ends: 270 [2021-11-03 04:10:45,625 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:10:45,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-03 04:10:45,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 263. [2021-11-03 04:10:45,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.4694656488549618) internal successors, (385), 262 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:45,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 385 transitions. [2021-11-03 04:10:45,636 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 385 transitions. Word has length 62 [2021-11-03 04:10:45,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:10:45,637 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 385 transitions. [2021-11-03 04:10:45,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:45,637 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 385 transitions. [2021-11-03 04:10:45,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-03 04:10:45,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:10:45,638 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:10:45,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:10:45,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:10:45,846 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:10:45,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:10:45,847 INFO L85 PathProgramCache]: Analyzing trace with hash 2088653726, now seen corresponding path program 1 times [2021-11-03 04:10:45,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:10:45,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589741981] [2021-11-03 04:10:45,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:45,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:10:45,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:10:45,848 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:10:45,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:10:46,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:46,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:10:46,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:10:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:46,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:10:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:47,144 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:10:47,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589741981] [2021-11-03 04:10:47,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589741981] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:10:47,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:10:47,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:10:47,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531577228] [2021-11-03 04:10:47,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:10:47,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:10:47,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:10:47,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:10:47,146 INFO L87 Difference]: Start difference. First operand 263 states and 385 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:47,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:10:47,226 INFO L93 Difference]: Finished difference Result 943 states and 1399 transitions. [2021-11-03 04:10:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:10:47,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-03 04:10:47,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:10:47,232 INFO L225 Difference]: With dead ends: 943 [2021-11-03 04:10:47,232 INFO L226 Difference]: Without dead ends: 713 [2021-11-03 04:10:47,233 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:10:47,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-11-03 04:10:47,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 488. [2021-11-03 04:10:47,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 1.462012320328542) internal successors, (712), 487 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:47,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 712 transitions. [2021-11-03 04:10:47,259 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 712 transitions. Word has length 62 [2021-11-03 04:10:47,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:10:47,260 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 712 transitions. [2021-11-03 04:10:47,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:47,260 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 712 transitions. [2021-11-03 04:10:47,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-03 04:10:47,261 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:10:47,261 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:10:47,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:10:47,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:10:47,479 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:10:47,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:10:47,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1312827232, now seen corresponding path program 1 times [2021-11-03 04:10:47,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:10:47,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964457508] [2021-11-03 04:10:47,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:47,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:10:47,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:10:47,481 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:10:47,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:10:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:48,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:10:48,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:10:48,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:48,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:48,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:48,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:48,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:48,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:10:49,051 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:10:49,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:10:52,586 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:10:52,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:10:59,960 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:10:59,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:11:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:11:00,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:11:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:11:00,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:11:00,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964457508] [2021-11-03 04:11:00,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964457508] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:11:00,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:11:00,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:11:00,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425182974] [2021-11-03 04:11:00,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:11:00,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:11:00,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:11:00,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:11:00,567 INFO L87 Difference]: Start difference. First operand 488 states and 712 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:49,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:11:49,580 INFO L93 Difference]: Finished difference Result 925 states and 1372 transitions. [2021-11-03 04:11:49,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:11:49,581 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-03 04:11:49,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:11:49,586 INFO L225 Difference]: With dead ends: 925 [2021-11-03 04:11:49,586 INFO L226 Difference]: Without dead ends: 702 [2021-11-03 04:11:49,587 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:11:49,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-11-03 04:11:49,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 488. [2021-11-03 04:11:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 1.459958932238193) internal successors, (711), 487 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:49,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 711 transitions. [2021-11-03 04:11:49,617 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 711 transitions. Word has length 62 [2021-11-03 04:11:49,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:11:49,617 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 711 transitions. [2021-11-03 04:11:49,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:49,618 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 711 transitions. [2021-11-03 04:11:49,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-03 04:11:49,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:11:49,620 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:11:49,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:11:49,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:11:49,835 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:11:49,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:11:49,836 INFO L85 PathProgramCache]: Analyzing trace with hash -970686709, now seen corresponding path program 1 times [2021-11-03 04:11:49,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:11:49,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414156080] [2021-11-03 04:11:49,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:11:49,837 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:11:49,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:11:49,838 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:11:49,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:11:50,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:11:50,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:11:50,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:11:51,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:51,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:51,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:51,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:51,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:51,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:11:51,213 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:11:51,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:11:51,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:11:51,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:11:51,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:11:51,626 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:11:51,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:11:54,084 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:11:54,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:11:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:11:54,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:11:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:11:54,600 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:11:54,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1414156080] [2021-11-03 04:11:54,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1414156080] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:11:54,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:11:54,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:11:54,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996475546] [2021-11-03 04:11:54,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:11:54,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:11:54,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:11:54,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:11:54,602 INFO L87 Difference]: Start difference. First operand 488 states and 711 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:28,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:12:28,422 INFO L93 Difference]: Finished difference Result 1410 states and 2098 transitions. [2021-11-03 04:12:28,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:12:28,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-03 04:12:28,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:12:28,429 INFO L225 Difference]: With dead ends: 1410 [2021-11-03 04:12:28,429 INFO L226 Difference]: Without dead ends: 959 [2021-11-03 04:12:28,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:12:28,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-11-03 04:12:28,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 594. [2021-11-03 04:12:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 1.4822934232715008) internal successors, (879), 593 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:28,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 879 transitions. [2021-11-03 04:12:28,469 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 879 transitions. Word has length 84 [2021-11-03 04:12:28,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:12:28,469 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 879 transitions. [2021-11-03 04:12:28,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:28,470 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 879 transitions. [2021-11-03 04:12:28,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 04:12:28,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:12:28,472 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:12:28,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:12:28,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:12:28,694 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:12:28,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:12:28,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1086434060, now seen corresponding path program 1 times [2021-11-03 04:12:28,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:12:28,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406164141] [2021-11-03 04:12:28,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:12:28,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:12:28,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:12:28,697 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:12:28,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:12:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:12:30,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:12:30,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:12:30,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:30,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:30,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:30,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:30,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:30,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:12:30,229 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:12:30,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:12:30,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:12:30,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:12:30,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:12:30,635 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:12:30,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:12:33,131 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:12:33,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:12:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:12:33,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:12:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:12:33,611 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:12:33,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406164141] [2021-11-03 04:12:33,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406164141] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:12:33,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:12:33,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:12:33,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528415820] [2021-11-03 04:12:33,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:12:33,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:12:33,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:12:33,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:12:33,613 INFO L87 Difference]: Start difference. First operand 594 states and 879 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:07,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:07,225 INFO L93 Difference]: Finished difference Result 1542 states and 2323 transitions. [2021-11-03 04:13:07,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:13:07,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-03 04:13:07,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:07,233 INFO L225 Difference]: With dead ends: 1542 [2021-11-03 04:13:07,233 INFO L226 Difference]: Without dead ends: 985 [2021-11-03 04:13:07,235 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:13:07,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-11-03 04:13:07,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 638. [2021-11-03 04:13:07,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 1.5149136577708007) internal successors, (965), 637 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:07,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 965 transitions. [2021-11-03 04:13:07,272 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 965 transitions. Word has length 85 [2021-11-03 04:13:07,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:07,273 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 965 transitions. [2021-11-03 04:13:07,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:07,273 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 965 transitions. [2021-11-03 04:13:07,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-03 04:13:07,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:07,276 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:13:07,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:07,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:13:07,498 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:07,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:07,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1060016578, now seen corresponding path program 1 times [2021-11-03 04:13:07,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:13:07,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976079268] [2021-11-03 04:13:07,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:07,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:13:07,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:13:07,501 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:13:07,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:13:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:09,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:13:09,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:09,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:09,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:09,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:09,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:09,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:09,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:13:09,305 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:13:09,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:13:09,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:13:09,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:13:09,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:13:09,717 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:13:09,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:13:11,757 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:13:11,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:13:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:13:11,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:13:12,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:13:12,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976079268] [2021-11-03 04:13:12,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976079268] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:12,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:12,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:13:12,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803612898] [2021-11-03 04:13:12,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:13:12,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:13:12,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:13:12,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:13:12,387 INFO L87 Difference]: Start difference. First operand 638 states and 965 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:46,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:46,995 INFO L93 Difference]: Finished difference Result 1665 states and 2532 transitions. [2021-11-03 04:13:46,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:13:46,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-03 04:13:46,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:47,001 INFO L225 Difference]: With dead ends: 1665 [2021-11-03 04:13:47,001 INFO L226 Difference]: Without dead ends: 1064 [2021-11-03 04:13:47,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:13:47,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-11-03 04:13:47,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 697. [2021-11-03 04:13:47,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 1.5114942528735633) internal successors, (1052), 696 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:47,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1052 transitions. [2021-11-03 04:13:47,041 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1052 transitions. Word has length 111 [2021-11-03 04:13:47,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:47,041 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 1052 transitions. [2021-11-03 04:13:47,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:47,042 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1052 transitions. [2021-11-03 04:13:47,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-03 04:13:47,044 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:47,045 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:13:47,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:47,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:13:47,270 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:47,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:47,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1369047964, now seen corresponding path program 1 times [2021-11-03 04:13:47,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:13:47,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015406140] [2021-11-03 04:13:47,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:47,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:13:47,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:13:47,273 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:13:47,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:13:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:48,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:13:48,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:48,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:48,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:48,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:48,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:48,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:48,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:13:49,080 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:13:49,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:13:49,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:13:49,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:13:49,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:13:49,488 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:13:49,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:13:51,279 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:13:51,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:13:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:13:51,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:13:51,969 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:13:51,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015406140] [2021-11-03 04:13:51,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015406140] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:51,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:51,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:13:51,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39544480] [2021-11-03 04:13:51,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:13:51,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:13:51,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:13:51,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:13:51,971 INFO L87 Difference]: Start difference. First operand 697 states and 1052 transitions. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:30,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:30,410 INFO L93 Difference]: Finished difference Result 1700 states and 2573 transitions. [2021-11-03 04:14:30,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:14:30,412 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-03 04:14:30,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:30,418 INFO L225 Difference]: With dead ends: 1700 [2021-11-03 04:14:30,418 INFO L226 Difference]: Without dead ends: 1040 [2021-11-03 04:14:30,420 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:14:30,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-11-03 04:14:30,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 697. [2021-11-03 04:14:30,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 1.5057471264367817) internal successors, (1048), 696 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:30,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1048 transitions. [2021-11-03 04:14:30,457 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1048 transitions. Word has length 112 [2021-11-03 04:14:30,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:14:30,457 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 1048 transitions. [2021-11-03 04:14:30,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:30,458 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1048 transitions. [2021-11-03 04:14:30,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-03 04:14:30,460 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:30,461 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-03 04:14:30,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:30,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:14:30,682 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:14:30,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:30,682 INFO L85 PathProgramCache]: Analyzing trace with hash -400637440, now seen corresponding path program 1 times [2021-11-03 04:14:30,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:14:30,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [143408842] [2021-11-03 04:14:30,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:30,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:14:30,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:14:30,684 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:14:30,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be0e6b62-c342-4d44-8802-779a55a7ced4/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:14:32,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:32,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:14:32,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:32,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:14:32,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:14:32,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:14:32,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:14:32,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:14:32,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:14:32,445 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:14:32,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:14:32,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:14:32,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:14:32,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:14:32,835 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:14:32,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:14:34,701 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:14:34,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:14:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:14:34,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:14:35,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:14:35,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [143408842] [2021-11-03 04:14:35,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [143408842] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:14:35,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:14:35,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:14:35,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424065044] [2021-11-03 04:14:35,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:14:35,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:14:35,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:14:35,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:14:35,335 INFO L87 Difference]: Start difference. First operand 697 states and 1048 transitions. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)