./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec7_product24.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8 --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 312fc8529e2c53d6a3be2cb9c54168ebb93fc3f65452574800e27c42fdf03e19 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:13:49,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:13:49,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:13:49,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:13:49,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:13:49,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:13:49,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:13:49,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:13:49,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:13:49,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:13:49,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:13:49,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:13:49,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:13:49,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:13:49,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:13:49,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:13:49,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:13:49,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:13:49,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:13:49,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:13:49,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:13:49,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:13:49,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:13:49,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:13:49,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:13:49,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:13:49,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:13:49,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:13:49,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:13:49,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:13:49,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:13:49,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:13:49,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:13:49,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:13:49,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:13:49,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:13:49,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:13:49,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:13:49,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:13:49,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:13:49,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:13:49,293 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:13:49,337 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:13:49,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:13:49,339 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:13:49,340 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:13:49,340 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:13:49,340 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:13:49,340 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:13:49,341 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:13:49,347 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:13:49,347 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:13:49,348 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:13:49,348 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:13:49,349 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:13:49,349 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:13:49,349 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:13:49,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:13:49,350 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:13:49,350 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:13:49,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:13:49,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:13:49,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:13:49,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:13:49,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:13:49,352 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:13:49,352 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:13:49,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:13:49,352 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:13:49,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:13:49,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:13:49,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:13:49,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:13:49,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:13:49,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:13:49,356 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:13:49,356 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:13:49,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:13:49,356 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:13:49,356 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:13:49,357 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:13:49,357 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_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 312fc8529e2c53d6a3be2cb9c54168ebb93fc3f65452574800e27c42fdf03e19 [2021-11-07 01:13:49,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:13:49,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:13:49,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:13:49,683 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:13:49,684 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:13:49,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec7_product24.cil.c [2021-11-07 01:13:49,759 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/data/cad4ad350/66b48df4a4a9453691621a874d8ef898/FLAGa53b055d9 [2021-11-07 01:13:50,359 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:13:50,360 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/sv-benchmarks/c/product-lines/email_spec7_product24.cil.c [2021-11-07 01:13:50,393 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/data/cad4ad350/66b48df4a4a9453691621a874d8ef898/FLAGa53b055d9 [2021-11-07 01:13:50,571 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/data/cad4ad350/66b48df4a4a9453691621a874d8ef898 [2021-11-07 01:13:50,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:13:50,575 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:13:50,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:13:50,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:13:50,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:13:50,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:13:50" (1/1) ... [2021-11-07 01:13:50,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f04eff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:50, skipping insertion in model container [2021-11-07 01:13:50,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:13:50" (1/1) ... [2021-11-07 01:13:50,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:13:50,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:13:51,272 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_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/sv-benchmarks/c/product-lines/email_spec7_product24.cil.c[62782,62795] [2021-11-07 01:13:51,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:13:51,291 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) [2021-11-07 01:13:51,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7923f30c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:51, skipping insertion in model container [2021-11-07 01:13:51,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:13:51,296 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:13:51,298 INFO L168 Benchmark]: Toolchain (without parser) took 721.47 ms. Allocated memory is still 117.4 MB. Free memory was 80.9 MB in the beginning and 82.0 MB in the end (delta: -1.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:13:51,300 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 83.9 MB. Free memory was 54.5 MB in the beginning and 54.4 MB in the end (delta: 27.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:13:51,301 INFO L168 Benchmark]: CACSL2BoogieTranslator took 718.86 ms. Allocated memory is still 117.4 MB. Free memory was 80.6 MB in the beginning and 82.0 MB in the end (delta: -1.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:13:51,303 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 83.9 MB. Free memory was 54.5 MB in the beginning and 54.4 MB in the end (delta: 27.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 718.86 ms. Allocated memory is still 117.4 MB. Free memory was 80.6 MB in the beginning and 82.0 MB in the end (delta: -1.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 306]: 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_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8 --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 312fc8529e2c53d6a3be2cb9c54168ebb93fc3f65452574800e27c42fdf03e19 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:13:53,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:13:53,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:13:53,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:13:53,598 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:13:53,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:13:53,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:13:53,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:13:53,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:13:53,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:13:53,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:13:53,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:13:53,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:13:53,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:13:53,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:13:53,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:13:53,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:13:53,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:13:53,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:13:53,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:13:53,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:13:53,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:13:53,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:13:53,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:13:53,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:13:53,664 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:13:53,665 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:13:53,666 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:13:53,667 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:13:53,668 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:13:53,669 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:13:53,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:13:53,671 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:13:53,672 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:13:53,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:13:53,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:13:53,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:13:53,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:13:53,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:13:53,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:13:53,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:13:53,679 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:13:53,719 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:13:53,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:13:53,721 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:13:53,721 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:13:53,722 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:13:53,722 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:13:53,722 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:13:53,722 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:13:53,722 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:13:53,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:13:53,725 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:13:53,725 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:13:53,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:13:53,725 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:13:53,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:13:53,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:13:53,726 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:13:53,726 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:13:53,726 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:13:53,727 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:13:53,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:13:53,727 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:13:53,727 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:13:53,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:13:53,728 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:13:53,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:13:53,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:13:53,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:13:53,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:13:53,729 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:13:53,729 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:13:53,729 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:13:53,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:13:53,730 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:13:53,730 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:13:53,730 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_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 312fc8529e2c53d6a3be2cb9c54168ebb93fc3f65452574800e27c42fdf03e19 [2021-11-07 01:13:54,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:13:54,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:13:54,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:13:54,104 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:13:54,105 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:13:54,107 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec7_product24.cil.c [2021-11-07 01:13:54,191 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/data/cfd0eeebe/5bc2505e21bf45f9a958559dda1c00ee/FLAG5e1721d32 [2021-11-07 01:13:54,862 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:13:54,863 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/sv-benchmarks/c/product-lines/email_spec7_product24.cil.c [2021-11-07 01:13:54,883 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/data/cfd0eeebe/5bc2505e21bf45f9a958559dda1c00ee/FLAG5e1721d32 [2021-11-07 01:13:55,083 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/data/cfd0eeebe/5bc2505e21bf45f9a958559dda1c00ee [2021-11-07 01:13:55,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:13:55,091 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:13:55,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:13:55,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:13:55,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:13:55,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:13:55" (1/1) ... [2021-11-07 01:13:55,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e20145f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:55, skipping insertion in model container [2021-11-07 01:13:55,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:13:55" (1/1) ... [2021-11-07 01:13:55,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:13:55,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:13:55,928 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_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/sv-benchmarks/c/product-lines/email_spec7_product24.cil.c[62782,62795] [2021-11-07 01:13:55,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:13:55,953 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:13:55,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:13:56,114 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_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/sv-benchmarks/c/product-lines/email_spec7_product24.cil.c[62782,62795] [2021-11-07 01:13:56,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:13:56,124 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:13:56,278 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_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/sv-benchmarks/c/product-lines/email_spec7_product24.cil.c[62782,62795] [2021-11-07 01:13:56,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:13:56,332 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:13:56,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:56 WrapperNode [2021-11-07 01:13:56,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:13:56,334 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:13:56,334 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:13:56,334 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:13:56,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:56" (1/1) ... [2021-11-07 01:13:56,410 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:56" (1/1) ... [2021-11-07 01:13:56,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:13:56,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:13:56,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:13:56,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:13:56,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:56" (1/1) ... [2021-11-07 01:13:56,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:56" (1/1) ... [2021-11-07 01:13:56,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:56" (1/1) ... [2021-11-07 01:13:56,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:56" (1/1) ... [2021-11-07 01:13:56,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:56" (1/1) ... [2021-11-07 01:13:56,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:56" (1/1) ... [2021-11-07 01:13:56,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:56" (1/1) ... [2021-11-07 01:13:56,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:13:56,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:13:56,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:13:56,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:13:56,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:56" (1/1) ... [2021-11-07 01:13:56,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:13:56,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:13:56,751 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:13:56,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:13:56,797 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:13:56,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:13:56,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:13:56,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:13:56,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:14:01,005 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:14:01,005 INFO L299 CfgBuilder]: Removed 323 assume(true) statements. [2021-11-07 01:14:01,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:14:01 BoogieIcfgContainer [2021-11-07 01:14:01,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:14:01,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:14:01,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:14:01,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:14:01,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:13:55" (1/3) ... [2021-11-07 01:14:01,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12061b96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:14:01, skipping insertion in model container [2021-11-07 01:14:01,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:56" (2/3) ... [2021-11-07 01:14:01,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12061b96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:14:01, skipping insertion in model container [2021-11-07 01:14:01,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:14:01" (3/3) ... [2021-11-07 01:14:01,015 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec7_product24.cil.c [2021-11-07 01:14:01,027 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:14:01,027 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:14:01,076 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:14:01,082 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 [2021-11-07 01:14:01,082 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:14:01,106 INFO L276 IsEmpty]: Start isEmpty. Operand has 463 states, 460 states have (on average 1.7369565217391305) internal successors, (799), 462 states have internal predecessors, (799), 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) [2021-11-07 01:14:01,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 01:14:01,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:01,118 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] [2021-11-07 01:14:01,118 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:01,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:01,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1960631783, now seen corresponding path program 1 times [2021-11-07 01:14:01,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:01,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769526363] [2021-11-07 01:14:01,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:01,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:01,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:01,142 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:01,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:14:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:01,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:14:01,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:01,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:01,883 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:01,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769526363] [2021-11-07 01:14:01,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769526363] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:01,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:01,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:14:01,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070608169] [2021-11-07 01:14:01,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:14:01,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:01,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:14:01,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:14:01,917 INFO L87 Difference]: Start difference. First operand has 463 states, 460 states have (on average 1.7369565217391305) internal successors, (799), 462 states have internal predecessors, (799), 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 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 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) [2021-11-07 01:14:01,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:01,989 INFO L93 Difference]: Finished difference Result 680 states and 1150 transitions. [2021-11-07 01:14:01,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:14:01,990 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 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 38 [2021-11-07 01:14:01,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:02,006 INFO L225 Difference]: With dead ends: 680 [2021-11-07 01:14:02,006 INFO L226 Difference]: Without dead ends: 384 [2021-11-07 01:14:02,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:14:02,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-07 01:14:02,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2021-11-07 01:14:02,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 382 states have (on average 1.7408376963350785) internal successors, (665), 383 states have internal predecessors, (665), 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) [2021-11-07 01:14:02,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 665 transitions. [2021-11-07 01:14:02,076 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 665 transitions. Word has length 38 [2021-11-07 01:14:02,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:02,077 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 665 transitions. [2021-11-07 01:14:02,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 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) [2021-11-07 01:14:02,078 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 665 transitions. [2021-11-07 01:14:02,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 01:14:02,082 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:02,082 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] [2021-11-07 01:14:02,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:02,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:02,290 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:02,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:02,291 INFO L85 PathProgramCache]: Analyzing trace with hash 860474452, now seen corresponding path program 1 times [2021-11-07 01:14:02,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:02,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666768045] [2021-11-07 01:14:02,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:02,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:02,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:02,294 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:02,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:14:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:02,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:14:02,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:02,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:02,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:02,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666768045] [2021-11-07 01:14:02,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666768045] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:02,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:02,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:14:02,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839291992] [2021-11-07 01:14:02,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:14:02,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:02,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:14:02,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:14:02,932 INFO L87 Difference]: Start difference. First operand 384 states and 665 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2021-11-07 01:14:03,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:03,043 INFO L93 Difference]: Finished difference Result 1122 states and 1947 transitions. [2021-11-07 01:14:03,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:14:03,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 39 [2021-11-07 01:14:03,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:03,052 INFO L225 Difference]: With dead ends: 1122 [2021-11-07 01:14:03,052 INFO L226 Difference]: Without dead ends: 753 [2021-11-07 01:14:03,058 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:14:03,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-11-07 01:14:03,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 383. [2021-11-07 01:14:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 381 states have (on average 1.7322834645669292) internal successors, (660), 382 states have internal predecessors, (660), 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) [2021-11-07 01:14:03,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 660 transitions. [2021-11-07 01:14:03,117 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 660 transitions. Word has length 39 [2021-11-07 01:14:03,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:03,117 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 660 transitions. [2021-11-07 01:14:03,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2021-11-07 01:14:03,118 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 660 transitions. [2021-11-07 01:14:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 01:14:03,121 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:03,121 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] [2021-11-07 01:14:03,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:03,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:03,336 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:03,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:03,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1837082822, now seen corresponding path program 1 times [2021-11-07 01:14:03,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:03,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602843930] [2021-11-07 01:14:03,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:03,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:03,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:03,346 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:03,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:14:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:03,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:03,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:03,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:03,983 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:03,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602843930] [2021-11-07 01:14:03,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602843930] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:03,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:03,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:14:03,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395638027] [2021-11-07 01:14:03,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:14:03,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:03,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:14:03,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:14:03,989 INFO L87 Difference]: Start difference. First operand 383 states and 660 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 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) [2021-11-07 01:14:04,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:04,215 INFO L93 Difference]: Finished difference Result 1449 states and 2502 transitions. [2021-11-07 01:14:04,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:14:04,216 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 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 41 [2021-11-07 01:14:04,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:04,225 INFO L225 Difference]: With dead ends: 1449 [2021-11-07 01:14:04,226 INFO L226 Difference]: Without dead ends: 1084 [2021-11-07 01:14:04,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:14:04,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2021-11-07 01:14:04,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 382. [2021-11-07 01:14:04,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 380 states have (on average 1.7263157894736842) internal successors, (656), 381 states have internal predecessors, (656), 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) [2021-11-07 01:14:04,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 656 transitions. [2021-11-07 01:14:04,266 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 656 transitions. Word has length 41 [2021-11-07 01:14:04,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:04,266 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 656 transitions. [2021-11-07 01:14:04,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 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) [2021-11-07 01:14:04,268 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 656 transitions. [2021-11-07 01:14:04,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 01:14:04,272 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:04,273 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] [2021-11-07 01:14:04,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:04,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:04,486 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:04,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:04,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1877420403, now seen corresponding path program 1 times [2021-11-07 01:14:04,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:04,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887340036] [2021-11-07 01:14:04,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:04,489 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:04,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:04,491 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:04,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:14:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:04,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:14:04,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:05,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:05,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:05,123 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:05,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887340036] [2021-11-07 01:14:05,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887340036] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:05,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:05,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:14:05,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092169665] [2021-11-07 01:14:05,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:14:05,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:05,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:14:05,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:14:05,126 INFO L87 Difference]: Start difference. First operand 382 states and 656 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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) [2021-11-07 01:14:05,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:05,190 INFO L93 Difference]: Finished difference Result 761 states and 1309 transitions. [2021-11-07 01:14:05,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:14:05,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 42 [2021-11-07 01:14:05,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:05,194 INFO L225 Difference]: With dead ends: 761 [2021-11-07 01:14:05,194 INFO L226 Difference]: Without dead ends: 387 [2021-11-07 01:14:05,195 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:14:05,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-07 01:14:05,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 382. [2021-11-07 01:14:05,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 380 states have (on average 1.7184210526315788) internal successors, (653), 381 states have internal predecessors, (653), 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) [2021-11-07 01:14:05,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 653 transitions. [2021-11-07 01:14:05,230 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 653 transitions. Word has length 42 [2021-11-07 01:14:05,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:05,231 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 653 transitions. [2021-11-07 01:14:05,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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) [2021-11-07 01:14:05,231 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 653 transitions. [2021-11-07 01:14:05,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 01:14:05,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:05,233 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] [2021-11-07 01:14:05,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:05,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:05,448 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:05,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:05,448 INFO L85 PathProgramCache]: Analyzing trace with hash -426847198, now seen corresponding path program 1 times [2021-11-07 01:14:05,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:05,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060389418] [2021-11-07 01:14:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:05,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:05,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:05,451 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:05,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:14:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:05,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:14:05,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:05,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:06,078 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:06,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060389418] [2021-11-07 01:14:06,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060389418] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:06,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:06,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:14:06,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517487810] [2021-11-07 01:14:06,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:14:06,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:06,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:14:06,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:14:06,080 INFO L87 Difference]: Start difference. First operand 382 states and 653 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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) [2021-11-07 01:14:06,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:06,303 INFO L93 Difference]: Finished difference Result 1436 states and 2478 transitions. [2021-11-07 01:14:06,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:14:06,304 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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 43 [2021-11-07 01:14:06,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:06,311 INFO L225 Difference]: With dead ends: 1436 [2021-11-07 01:14:06,311 INFO L226 Difference]: Without dead ends: 1080 [2021-11-07 01:14:06,312 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:14:06,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-11-07 01:14:06,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 382. [2021-11-07 01:14:06,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 380 states have (on average 1.7105263157894737) internal successors, (650), 381 states have internal predecessors, (650), 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) [2021-11-07 01:14:06,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 650 transitions. [2021-11-07 01:14:06,350 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 650 transitions. Word has length 43 [2021-11-07 01:14:06,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:06,350 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 650 transitions. [2021-11-07 01:14:06,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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) [2021-11-07 01:14:06,351 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 650 transitions. [2021-11-07 01:14:06,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:14:06,352 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:06,352 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] [2021-11-07 01:14:06,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:06,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:06,570 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:06,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:06,571 INFO L85 PathProgramCache]: Analyzing trace with hash 162583261, now seen corresponding path program 1 times [2021-11-07 01:14:06,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:06,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588035534] [2021-11-07 01:14:06,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:06,572 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:06,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:06,574 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:06,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:14:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:07,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:07,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:07,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:07,191 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:07,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588035534] [2021-11-07 01:14:07,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588035534] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:07,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:07,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:14:07,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500853125] [2021-11-07 01:14:07,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:14:07,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:07,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:14:07,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:14:07,196 INFO L87 Difference]: Start difference. First operand 382 states and 650 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2021-11-07 01:14:07,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:07,273 INFO L93 Difference]: Finished difference Result 876 states and 1490 transitions. [2021-11-07 01:14:07,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:14:07,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 [2021-11-07 01:14:07,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:07,278 INFO L225 Difference]: With dead ends: 876 [2021-11-07 01:14:07,278 INFO L226 Difference]: Without dead ends: 738 [2021-11-07 01:14:07,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:14:07,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-11-07 01:14:07,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 600. [2021-11-07 01:14:07,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 598 states have (on average 1.7525083612040133) internal successors, (1048), 599 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) [2021-11-07 01:14:07,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1048 transitions. [2021-11-07 01:14:07,330 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1048 transitions. Word has length 45 [2021-11-07 01:14:07,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:07,330 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 1048 transitions. [2021-11-07 01:14:07,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2021-11-07 01:14:07,331 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1048 transitions. [2021-11-07 01:14:07,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:14:07,332 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:07,333 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:07,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:07,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:07,547 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:07,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:07,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1351954290, now seen corresponding path program 1 times [2021-11-07 01:14:07,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:07,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826623713] [2021-11-07 01:14:07,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:07,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:07,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:07,550 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:07,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:14:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:07,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:07,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:08,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:08,256 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:08,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826623713] [2021-11-07 01:14:08,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826623713] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:08,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:08,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:14:08,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674262025] [2021-11-07 01:14:08,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:14:08,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:08,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:14:08,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:08,258 INFO L87 Difference]: Start difference. First operand 600 states and 1048 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2021-11-07 01:14:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:08,341 INFO L93 Difference]: Finished difference Result 1420 states and 2485 transitions. [2021-11-07 01:14:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:08,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 57 [2021-11-07 01:14:08,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:08,348 INFO L225 Difference]: With dead ends: 1420 [2021-11-07 01:14:08,348 INFO L226 Difference]: Without dead ends: 904 [2021-11-07 01:14:08,350 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:08,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-11-07 01:14:08,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 766. [2021-11-07 01:14:08,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 764 states have (on average 1.7657068062827226) internal successors, (1349), 765 states have internal predecessors, (1349), 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) [2021-11-07 01:14:08,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1349 transitions. [2021-11-07 01:14:08,414 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1349 transitions. Word has length 57 [2021-11-07 01:14:08,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:08,415 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 1349 transitions. [2021-11-07 01:14:08,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2021-11-07 01:14:08,415 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1349 transitions. [2021-11-07 01:14:08,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:14:08,417 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:08,417 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:08,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:08,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:08,632 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:08,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:08,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1957494701, now seen corresponding path program 1 times [2021-11-07 01:14:08,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:08,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307671911] [2021-11-07 01:14:08,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:08,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:08,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:08,640 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:08,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:14:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:09,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:09,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:09,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:09,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:09,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307671911] [2021-11-07 01:14:09,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307671911] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:09,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:09,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:14:09,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047030427] [2021-11-07 01:14:09,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:14:09,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:09,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:14:09,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:09,422 INFO L87 Difference]: Start difference. First operand 766 states and 1349 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2021-11-07 01:14:09,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:09,557 INFO L93 Difference]: Finished difference Result 1950 states and 3453 transitions. [2021-11-07 01:14:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:09,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 [2021-11-07 01:14:09,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:09,569 INFO L225 Difference]: With dead ends: 1950 [2021-11-07 01:14:09,569 INFO L226 Difference]: Without dead ends: 1276 [2021-11-07 01:14:09,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:09,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-11-07 01:14:09,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1138. [2021-11-07 01:14:09,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1136 states have (on average 1.784330985915493) internal successors, (2027), 1137 states have internal predecessors, (2027), 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) [2021-11-07 01:14:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 2027 transitions. [2021-11-07 01:14:09,695 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 2027 transitions. Word has length 58 [2021-11-07 01:14:09,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:09,695 INFO L470 AbstractCegarLoop]: Abstraction has 1138 states and 2027 transitions. [2021-11-07 01:14:09,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2021-11-07 01:14:09,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 2027 transitions. [2021-11-07 01:14:09,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:14:09,698 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:09,699 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:09,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:09,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:09,914 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:09,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:09,914 INFO L85 PathProgramCache]: Analyzing trace with hash 570144572, now seen corresponding path program 1 times [2021-11-07 01:14:09,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:09,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486878191] [2021-11-07 01:14:09,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:09,915 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:09,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:09,916 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:09,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:14:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:10,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:10,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:10,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:10,658 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:10,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486878191] [2021-11-07 01:14:10,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486878191] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:10,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:10,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:14:10,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331152573] [2021-11-07 01:14:10,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:14:10,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:10,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:14:10,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:10,661 INFO L87 Difference]: Start difference. First operand 1138 states and 2027 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-11-07 01:14:10,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:10,835 INFO L93 Difference]: Finished difference Result 3046 states and 5456 transitions. [2021-11-07 01:14:10,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:10,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 [2021-11-07 01:14:10,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:10,849 INFO L225 Difference]: With dead ends: 3046 [2021-11-07 01:14:10,849 INFO L226 Difference]: Without dead ends: 2008 [2021-11-07 01:14:10,854 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:10,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-11-07 01:14:11,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1870. [2021-11-07 01:14:11,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1868 states have (on average 1.7997858672376874) internal successors, (3362), 1869 states have internal predecessors, (3362), 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) [2021-11-07 01:14:11,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 3362 transitions. [2021-11-07 01:14:11,043 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 3362 transitions. Word has length 59 [2021-11-07 01:14:11,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:11,044 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 3362 transitions. [2021-11-07 01:14:11,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-11-07 01:14:11,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 3362 transitions. [2021-11-07 01:14:11,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:14:11,047 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:11,047 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:11,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:11,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:11,262 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:11,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:11,263 INFO L85 PathProgramCache]: Analyzing trace with hash 2138453180, now seen corresponding path program 1 times [2021-11-07 01:14:11,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:11,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751011398] [2021-11-07 01:14:11,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:11,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:11,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:11,265 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:11,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:14:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:11,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:11,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:11,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:12,119 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:12,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751011398] [2021-11-07 01:14:12,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751011398] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:12,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:12,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:14:12,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521588201] [2021-11-07 01:14:12,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:14:12,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:12,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:14:12,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:12,121 INFO L87 Difference]: Start difference. First operand 1870 states and 3362 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2021-11-07 01:14:12,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:12,369 INFO L93 Difference]: Finished difference Result 4978 states and 8980 transitions. [2021-11-07 01:14:12,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:12,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 [2021-11-07 01:14:12,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:12,392 INFO L225 Difference]: With dead ends: 4978 [2021-11-07 01:14:12,392 INFO L226 Difference]: Without dead ends: 3242 [2021-11-07 01:14:12,396 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:12,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-11-07 01:14:12,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 3104. [2021-11-07 01:14:12,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 3102 states have (on average 1.8075435203094778) internal successors, (5607), 3103 states have internal predecessors, (5607), 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) [2021-11-07 01:14:12,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 5607 transitions. [2021-11-07 01:14:12,679 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 5607 transitions. Word has length 60 [2021-11-07 01:14:12,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:12,679 INFO L470 AbstractCegarLoop]: Abstraction has 3104 states and 5607 transitions. [2021-11-07 01:14:12,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2021-11-07 01:14:12,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 5607 transitions. [2021-11-07 01:14:12,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:14:12,683 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:12,683 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:12,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:12,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:12,911 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:12,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:12,912 INFO L85 PathProgramCache]: Analyzing trace with hash 377258541, now seen corresponding path program 1 times [2021-11-07 01:14:12,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:12,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168917666] [2021-11-07 01:14:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:12,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:12,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:12,914 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:12,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:14:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:13,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:13,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:13,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:13,784 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:13,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168917666] [2021-11-07 01:14:13,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168917666] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:13,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:13,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:14:13,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834807164] [2021-11-07 01:14:13,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:14:13,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:13,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:14:13,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:13,786 INFO L87 Difference]: Start difference. First operand 3104 states and 5607 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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) [2021-11-07 01:14:14,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:14,139 INFO L93 Difference]: Finished difference Result 8396 states and 15198 transitions. [2021-11-07 01:14:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:14,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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 61 [2021-11-07 01:14:14,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:14,176 INFO L225 Difference]: With dead ends: 8396 [2021-11-07 01:14:14,176 INFO L226 Difference]: Without dead ends: 5460 [2021-11-07 01:14:14,181 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:14,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5460 states. [2021-11-07 01:14:14,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5460 to 5322. [2021-11-07 01:14:14,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5322 states, 5320 states have (on average 1.8105263157894738) internal successors, (9632), 5321 states have internal predecessors, (9632), 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) [2021-11-07 01:14:14,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5322 states to 5322 states and 9632 transitions. [2021-11-07 01:14:14,624 INFO L78 Accepts]: Start accepts. Automaton has 5322 states and 9632 transitions. Word has length 61 [2021-11-07 01:14:14,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:14,625 INFO L470 AbstractCegarLoop]: Abstraction has 5322 states and 9632 transitions. [2021-11-07 01:14:14,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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) [2021-11-07 01:14:14,626 INFO L276 IsEmpty]: Start isEmpty. Operand 5322 states and 9632 transitions. [2021-11-07 01:14:14,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:14:14,629 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:14,629 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:14,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 01:14:14,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:14,844 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:14,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:14,845 INFO L85 PathProgramCache]: Analyzing trace with hash -656882035, now seen corresponding path program 1 times [2021-11-07 01:14:14,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:14,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995917971] [2021-11-07 01:14:14,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:14,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:14,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:14,846 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:14,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:14:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:15,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:15,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:15,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:15,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:15,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995917971] [2021-11-07 01:14:15,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995917971] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:15,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:15,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:14:15,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380251090] [2021-11-07 01:14:15,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:14:15,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:15,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:14:15,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:15,672 INFO L87 Difference]: Start difference. First operand 5322 states and 9632 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2021-11-07 01:14:16,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:16,370 INFO L93 Difference]: Finished difference Result 15376 states and 27884 transitions. [2021-11-07 01:14:16,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:16,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 [2021-11-07 01:14:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:16,437 INFO L225 Difference]: With dead ends: 15376 [2021-11-07 01:14:16,437 INFO L226 Difference]: Without dead ends: 10230 [2021-11-07 01:14:16,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:16,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10230 states. [2021-11-07 01:14:17,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10230 to 10092. [2021-11-07 01:14:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10092 states, 10090 states have (on average 1.8125867195242815) internal successors, (18289), 10091 states have internal predecessors, (18289), 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) [2021-11-07 01:14:17,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10092 states to 10092 states and 18289 transitions. [2021-11-07 01:14:17,340 INFO L78 Accepts]: Start accepts. Automaton has 10092 states and 18289 transitions. Word has length 62 [2021-11-07 01:14:17,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:17,340 INFO L470 AbstractCegarLoop]: Abstraction has 10092 states and 18289 transitions. [2021-11-07 01:14:17,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2021-11-07 01:14:17,341 INFO L276 IsEmpty]: Start isEmpty. Operand 10092 states and 18289 transitions. [2021-11-07 01:14:17,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:14:17,349 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:17,349 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:17,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:17,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:17,562 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:17,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:17,563 INFO L85 PathProgramCache]: Analyzing trace with hash -2014711427, now seen corresponding path program 1 times [2021-11-07 01:14:17,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:17,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625459842] [2021-11-07 01:14:17,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:17,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:17,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:17,565 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:17,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:14:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:18,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:14:18,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:14:18,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:14:18,475 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:18,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625459842] [2021-11-07 01:14:18,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625459842] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:18,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:18,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:14:18,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412845789] [2021-11-07 01:14:18,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:14:18,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:18,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:14:18,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:14:18,478 INFO L87 Difference]: Start difference. First operand 10092 states and 18289 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2021-11-07 01:14:21,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:21,653 INFO L93 Difference]: Finished difference Result 24835 states and 45020 transitions. [2021-11-07 01:14:21,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:14:21,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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 63 [2021-11-07 01:14:21,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:21,700 INFO L225 Difference]: With dead ends: 24835 [2021-11-07 01:14:21,700 INFO L226 Difference]: Without dead ends: 14997 [2021-11-07 01:14:21,714 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:14:21,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14997 states. [2021-11-07 01:14:22,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14997 to 10059. [2021-11-07 01:14:22,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10059 states, 10057 states have (on average 1.80540916774386) internal successors, (18157), 10058 states have internal predecessors, (18157), 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) [2021-11-07 01:14:22,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10059 states to 10059 states and 18157 transitions. [2021-11-07 01:14:22,671 INFO L78 Accepts]: Start accepts. Automaton has 10059 states and 18157 transitions. Word has length 63 [2021-11-07 01:14:22,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:22,671 INFO L470 AbstractCegarLoop]: Abstraction has 10059 states and 18157 transitions. [2021-11-07 01:14:22,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2021-11-07 01:14:22,671 INFO L276 IsEmpty]: Start isEmpty. Operand 10059 states and 18157 transitions. [2021-11-07 01:14:22,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:14:22,681 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:22,681 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:22,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:22,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:22,896 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:22,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:22,896 INFO L85 PathProgramCache]: Analyzing trace with hash 601387100, now seen corresponding path program 1 times [2021-11-07 01:14:22,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:22,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125882107] [2021-11-07 01:14:22,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:22,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:22,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:22,899 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:22,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:14:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:23,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:23,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:23,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:23,896 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:23,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125882107] [2021-11-07 01:14:23,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125882107] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:23,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:23,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:14:23,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389464411] [2021-11-07 01:14:23,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:14:23,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:23,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:14:23,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:23,899 INFO L87 Difference]: Start difference. First operand 10059 states and 18157 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-07 01:14:25,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:25,174 INFO L93 Difference]: Finished difference Result 29419 states and 53166 transitions. [2021-11-07 01:14:25,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:25,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2021-11-07 01:14:25,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:25,231 INFO L225 Difference]: With dead ends: 29419 [2021-11-07 01:14:25,231 INFO L226 Difference]: Without dead ends: 19543 [2021-11-07 01:14:25,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:25,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19543 states. [2021-11-07 01:14:26,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19543 to 19405. [2021-11-07 01:14:26,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19405 states, 19403 states have (on average 1.8049786115549142) internal successors, (35022), 19404 states have internal predecessors, (35022), 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) [2021-11-07 01:14:27,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19405 states to 19405 states and 35022 transitions. [2021-11-07 01:14:27,002 INFO L78 Accepts]: Start accepts. Automaton has 19405 states and 35022 transitions. Word has length 63 [2021-11-07 01:14:27,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:27,002 INFO L470 AbstractCegarLoop]: Abstraction has 19405 states and 35022 transitions. [2021-11-07 01:14:27,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-07 01:14:27,003 INFO L276 IsEmpty]: Start isEmpty. Operand 19405 states and 35022 transitions. [2021-11-07 01:14:27,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:14:27,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:27,008 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:27,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:27,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:27,223 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:27,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:27,223 INFO L85 PathProgramCache]: Analyzing trace with hash 336016156, now seen corresponding path program 1 times [2021-11-07 01:14:27,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:27,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438838702] [2021-11-07 01:14:27,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:27,224 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:27,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:27,225 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:27,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:14:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:27,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:27,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:27,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:27,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:28,133 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:28,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438838702] [2021-11-07 01:14:28,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438838702] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:28,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:28,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:14:28,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687966861] [2021-11-07 01:14:28,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:14:28,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:28,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:14:28,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:28,135 INFO L87 Difference]: Start difference. First operand 19405 states and 35022 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-07 01:14:29,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:29,772 INFO L93 Difference]: Finished difference Result 57643 states and 104075 transitions. [2021-11-07 01:14:29,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:29,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-07 01:14:29,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:29,869 INFO L225 Difference]: With dead ends: 57643 [2021-11-07 01:14:29,869 INFO L226 Difference]: Without dead ends: 38425 [2021-11-07 01:14:29,902 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:29,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38425 states. [2021-11-07 01:14:32,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38425 to 38287. [2021-11-07 01:14:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38287 states, 38285 states have (on average 1.8024552696878673) internal successors, (69007), 38286 states have internal predecessors, (69007), 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) [2021-11-07 01:14:32,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38287 states to 38287 states and 69007 transitions. [2021-11-07 01:14:32,410 INFO L78 Accepts]: Start accepts. Automaton has 38287 states and 69007 transitions. Word has length 64 [2021-11-07 01:14:32,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:32,411 INFO L470 AbstractCegarLoop]: Abstraction has 38287 states and 69007 transitions. [2021-11-07 01:14:32,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-07 01:14:32,411 INFO L276 IsEmpty]: Start isEmpty. Operand 38287 states and 69007 transitions. [2021-11-07 01:14:32,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:14:32,417 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:32,417 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:32,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:32,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:32,630 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:32,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:32,631 INFO L85 PathProgramCache]: Analyzing trace with hash -434096445, now seen corresponding path program 1 times [2021-11-07 01:14:32,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:32,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4560693] [2021-11-07 01:14:32,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:32,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:32,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:32,632 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:32,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:14:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:33,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:14:33,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:14:33,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:14:33,597 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:33,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4560693] [2021-11-07 01:14:33,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4560693] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:33,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:33,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:14:33,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180888122] [2021-11-07 01:14:33,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:14:33,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:33,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:14:33,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:14:33,599 INFO L87 Difference]: Start difference. First operand 38287 states and 69007 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2021-11-07 01:14:40,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:40,064 INFO L93 Difference]: Finished difference Result 148545 states and 267575 transitions. [2021-11-07 01:14:40,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:14:40,065 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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 65 [2021-11-07 01:14:40,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:40,317 INFO L225 Difference]: With dead ends: 148545 [2021-11-07 01:14:40,317 INFO L226 Difference]: Without dead ends: 110511 [2021-11-07 01:14:40,355 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:14:40,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110511 states. [2021-11-07 01:14:43,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110511 to 38029. [2021-11-07 01:14:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38029 states, 38027 states have (on average 1.7875456912193968) internal successors, (67975), 38028 states have internal predecessors, (67975), 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) [2021-11-07 01:14:43,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38029 states to 38029 states and 67975 transitions. [2021-11-07 01:14:43,515 INFO L78 Accepts]: Start accepts. Automaton has 38029 states and 67975 transitions. Word has length 65 [2021-11-07 01:14:43,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:43,515 INFO L470 AbstractCegarLoop]: Abstraction has 38029 states and 67975 transitions. [2021-11-07 01:14:43,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2021-11-07 01:14:43,516 INFO L276 IsEmpty]: Start isEmpty. Operand 38029 states and 67975 transitions. [2021-11-07 01:14:43,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:14:43,522 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:43,522 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:43,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:43,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:43,737 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:43,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:43,738 INFO L85 PathProgramCache]: Analyzing trace with hash -746038815, now seen corresponding path program 1 times [2021-11-07 01:14:43,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:43,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563998407] [2021-11-07 01:14:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:43,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:43,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:43,739 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:43,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:14:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:44,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:44,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:44,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:44,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:44,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563998407] [2021-11-07 01:14:44,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563998407] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:44,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:44,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:14:44,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747450798] [2021-11-07 01:14:44,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:14:44,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:44,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:14:44,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:14:44,770 INFO L87 Difference]: Start difference. First operand 38029 states and 67975 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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) [2021-11-07 01:14:46,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:46,577 INFO L93 Difference]: Finished difference Result 75937 states and 135743 transitions. [2021-11-07 01:14:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:46,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 65 [2021-11-07 01:14:46,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:46,663 INFO L225 Difference]: With dead ends: 75937 [2021-11-07 01:14:46,663 INFO L226 Difference]: Without dead ends: 38167 [2021-11-07 01:14:46,697 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:14:46,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38167 states. [2021-11-07 01:14:48,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38167 to 38029. [2021-11-07 01:14:48,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38029 states, 38027 states have (on average 1.7841796618192336) internal successors, (67847), 38028 states have internal predecessors, (67847), 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) [2021-11-07 01:14:48,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38029 states to 38029 states and 67847 transitions. [2021-11-07 01:14:48,619 INFO L78 Accepts]: Start accepts. Automaton has 38029 states and 67847 transitions. Word has length 65 [2021-11-07 01:14:48,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:48,620 INFO L470 AbstractCegarLoop]: Abstraction has 38029 states and 67847 transitions. [2021-11-07 01:14:48,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2021-11-07 01:14:48,620 INFO L276 IsEmpty]: Start isEmpty. Operand 38029 states and 67847 transitions. [2021-11-07 01:14:48,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:14:48,624 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:48,624 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:48,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:48,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:48,834 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:48,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:48,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1536208690, now seen corresponding path program 1 times [2021-11-07 01:14:48,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:48,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331512033] [2021-11-07 01:14:48,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:48,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:48,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:48,836 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:48,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d56dc1b-7e3d-4f71-872f-cbf3cc5aef0c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:14:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:49,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:49,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:49,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:49,756 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:49,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331512033] [2021-11-07 01:14:49,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331512033] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:49,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:49,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:14:49,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633479609] [2021-11-07 01:14:49,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:14:49,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:49,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:14:49,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:49,758 INFO L87 Difference]: Start difference. First operand 38029 states and 67847 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2021-11-07 01:14:52,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:52,995 INFO L93 Difference]: Finished difference Result 105675 states and 188169 transitions. [2021-11-07 01:14:52,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:14:52,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2021-11-07 01:14:52,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:53,155 INFO L225 Difference]: With dead ends: 105675 [2021-11-07 01:14:53,155 INFO L226 Difference]: Without dead ends: 67865 [2021-11-07 01:14:53,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:14:53,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67865 states. [2021-11-07 01:14:57,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67865 to 67727.