./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec6_product22.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_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/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_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/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_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/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 e61661fc2d58041f16237a6d2ff2f3d5f72c7660b85c9fdf3f096a51b709ec23 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:23:25,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:23:25,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:23:25,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:23:25,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:23:25,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:23:25,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:23:25,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:23:25,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:23:25,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:23:25,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:23:25,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:23:25,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:23:25,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:23:25,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:23:25,266 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:23:25,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:23:25,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:23:25,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:23:25,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:23:25,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:23:25,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:23:25,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:23:25,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:23:25,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:23:25,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:23:25,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:23:25,304 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:23:25,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:23:25,306 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:23:25,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:23:25,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:23:25,309 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:23:25,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:23:25,312 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:23:25,312 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:23:25,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:23:25,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:23:25,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:23:25,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:23:25,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:23:25,316 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:23:25,350 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:23:25,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:23:25,351 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:23:25,351 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:23:25,351 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:23:25,351 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:23:25,351 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:23:25,352 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:23:25,352 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:23:25,352 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:23:25,352 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:23:25,353 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:23:25,353 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:23:25,353 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:23:25,353 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:23:25,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:23:25,354 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:23:25,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:23:25,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:23:25,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:23:25,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:23:25,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:23:25,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:23:25,356 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:23:25,356 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:23:25,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:23:25,356 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:23:25,356 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:23:25,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:23:25,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:23:25,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:23:25,357 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:23:25,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:23:25,358 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:23:25,358 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:23:25,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:23:25,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:23:25,359 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:23:25,359 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:23:25,359 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_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e61661fc2d58041f16237a6d2ff2f3d5f72c7660b85c9fdf3f096a51b709ec23 [2021-11-07 01:23:25,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:23:25,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:23:25,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:23:25,658 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:23:25,659 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:23:25,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec6_product22.cil.c [2021-11-07 01:23:25,736 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/data/748a80e5c/d3f44224ecdb4fb790cb741c87a72e3d/FLAG1bd4100e8 [2021-11-07 01:23:26,329 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:23:26,329 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/sv-benchmarks/c/product-lines/email_spec6_product22.cil.c [2021-11-07 01:23:26,350 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/data/748a80e5c/d3f44224ecdb4fb790cb741c87a72e3d/FLAG1bd4100e8 [2021-11-07 01:23:26,584 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/data/748a80e5c/d3f44224ecdb4fb790cb741c87a72e3d [2021-11-07 01:23:26,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:23:26,587 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:23:26,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:23:26,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:23:26,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:23:26,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:23:26" (1/1) ... [2021-11-07 01:23:26,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@785c9326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:26, skipping insertion in model container [2021-11-07 01:23:26,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:23:26" (1/1) ... [2021-11-07 01:23:26,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:23:26,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:23:27,052 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_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/sv-benchmarks/c/product-lines/email_spec6_product22.cil.c[21483,21496] [2021-11-07 01:23:27,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:23:27,256 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 01:23:27,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@35cb907a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:27, skipping insertion in model container [2021-11-07 01:23:27,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:23:27,257 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:23:27,260 INFO L168 Benchmark]: Toolchain (without parser) took 670.79 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 44.8 MB in the beginning and 71.6 MB in the end (delta: -26.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:23:27,262 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 86.0 MB. Free memory is still 64.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:23:27,264 INFO L168 Benchmark]: CACSL2BoogieTranslator took 668.32 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 44.6 MB in the beginning and 71.6 MB in the end (delta: -27.0 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:23:27,266 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 86.0 MB. Free memory is still 64.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 668.32 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 44.6 MB in the beginning and 71.6 MB in the end (delta: -27.0 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 538]: 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_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/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_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/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_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/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 e61661fc2d58041f16237a6d2ff2f3d5f72c7660b85c9fdf3f096a51b709ec23 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:23:29,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:23:29,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:23:29,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:23:29,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:23:29,599 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:23:29,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:23:29,605 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:23:29,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:23:29,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:23:29,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:23:29,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:23:29,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:23:29,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:23:29,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:23:29,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:23:29,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:23:29,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:23:29,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:23:29,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:23:29,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:23:29,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:23:29,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:23:29,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:23:29,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:23:29,659 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:23:29,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:23:29,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:23:29,662 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:23:29,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:23:29,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:23:29,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:23:29,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:23:29,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:23:29,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:23:29,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:23:29,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:23:29,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:23:29,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:23:29,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:23:29,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:23:29,678 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:23:29,720 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:23:29,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:23:29,722 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:23:29,723 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:23:29,723 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:23:29,723 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:23:29,723 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:23:29,724 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:23:29,724 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:23:29,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:23:29,726 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:23:29,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:23:29,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:23:29,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:23:29,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:23:29,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:23:29,728 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:23:29,728 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:23:29,728 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:23:29,729 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:23:29,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:23:29,729 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:23:29,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:23:29,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:23:29,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:23:29,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:23:29,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:23:29,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:23:29,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:23:29,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:23:29,731 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:23:29,731 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:23:29,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:23:29,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:23:29,732 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:23:29,732 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_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e61661fc2d58041f16237a6d2ff2f3d5f72c7660b85c9fdf3f096a51b709ec23 [2021-11-07 01:23:30,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:23:30,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:23:30,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:23:30,206 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:23:30,207 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:23:30,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec6_product22.cil.c [2021-11-07 01:23:30,285 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/data/f4142fae5/3f630933a6e34d0eb1a6e2219c1d6ce1/FLAGc085e2b5c [2021-11-07 01:23:30,987 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:23:30,987 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/sv-benchmarks/c/product-lines/email_spec6_product22.cil.c [2021-11-07 01:23:31,013 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/data/f4142fae5/3f630933a6e34d0eb1a6e2219c1d6ce1/FLAGc085e2b5c [2021-11-07 01:23:31,215 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/data/f4142fae5/3f630933a6e34d0eb1a6e2219c1d6ce1 [2021-11-07 01:23:31,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:23:31,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:23:31,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:23:31,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:23:31,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:23:31,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:23:31" (1/1) ... [2021-11-07 01:23:31,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3120954d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:31, skipping insertion in model container [2021-11-07 01:23:31,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:23:31" (1/1) ... [2021-11-07 01:23:31,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:23:31,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:23:31,685 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_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/sv-benchmarks/c/product-lines/email_spec6_product22.cil.c[21483,21496] [2021-11-07 01:23:31,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:23:31,894 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:23:31,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:23:31,948 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_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/sv-benchmarks/c/product-lines/email_spec6_product22.cil.c[21483,21496] [2021-11-07 01:23:32,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:23:32,038 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:23:32,075 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_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/sv-benchmarks/c/product-lines/email_spec6_product22.cil.c[21483,21496] [2021-11-07 01:23:32,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:23:32,154 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:23:32,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:32 WrapperNode [2021-11-07 01:23:32,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:23:32,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:23:32,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:23:32,156 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:23:32,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:32" (1/1) ... [2021-11-07 01:23:32,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:32" (1/1) ... [2021-11-07 01:23:32,356 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:23:32,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:23:32,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:23:32,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:23:32,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:32" (1/1) ... [2021-11-07 01:23:32,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:32" (1/1) ... [2021-11-07 01:23:32,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:32" (1/1) ... [2021-11-07 01:23:32,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:32" (1/1) ... [2021-11-07 01:23:32,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:32" (1/1) ... [2021-11-07 01:23:32,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:32" (1/1) ... [2021-11-07 01:23:32,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:32" (1/1) ... [2021-11-07 01:23:32,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:23:32,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:23:32,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:23:32,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:23:32,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:32" (1/1) ... [2021-11-07 01:23:32,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:23:32,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:23:32,571 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:23:32,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:23:32,617 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:23:32,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:23:32,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:23:32,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:23:32,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:23:37,287 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:23:37,287 INFO L299 CfgBuilder]: Removed 331 assume(true) statements. [2021-11-07 01:23:37,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:23:37 BoogieIcfgContainer [2021-11-07 01:23:37,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:23:37,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:23:37,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:23:37,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:23:37,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:23:31" (1/3) ... [2021-11-07 01:23:37,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@600e2131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:23:37, skipping insertion in model container [2021-11-07 01:23:37,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:32" (2/3) ... [2021-11-07 01:23:37,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@600e2131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:23:37, skipping insertion in model container [2021-11-07 01:23:37,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:23:37" (3/3) ... [2021-11-07 01:23:37,299 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec6_product22.cil.c [2021-11-07 01:23:37,304 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:23:37,304 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:23:37,371 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:23:37,379 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 01:23:37,379 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:23:37,415 INFO L276 IsEmpty]: Start isEmpty. Operand has 493 states, 490 states have (on average 1.7408163265306122) internal successors, (853), 492 states have internal predecessors, (853), 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 01:23:37,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:23:37,446 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:37,446 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] [2021-11-07 01:23:37,447 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:23:37,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:37,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1017516910, now seen corresponding path program 1 times [2021-11-07 01:23:37,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:37,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264134551] [2021-11-07 01:23:37,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:37,473 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:37,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:37,480 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:37,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:23:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:37,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:23:37,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:38,201 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 01:23:38,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:38,399 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 01:23:38,400 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:38,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264134551] [2021-11-07 01:23:38,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264134551] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:38,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:38,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:23:38,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85985029] [2021-11-07 01:23:38,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:23:38,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:38,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:23:38,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:23:38,430 INFO L87 Difference]: Start difference. First operand has 493 states, 490 states have (on average 1.7408163265306122) internal successors, (853), 492 states have internal predecessors, (853), 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 25.0) internal successors, (50), 2 states have internal predecessors, (50), 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 01:23:38,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:38,513 INFO L93 Difference]: Finished difference Result 740 states and 1258 transitions. [2021-11-07 01:23:38,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:23:38,515 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 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 50 [2021-11-07 01:23:38,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:38,537 INFO L225 Difference]: With dead ends: 740 [2021-11-07 01:23:38,537 INFO L226 Difference]: Without dead ends: 422 [2021-11-07 01:23:38,542 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 98 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 01:23:38,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-11-07 01:23:38,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 422. [2021-11-07 01:23:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 420 states have (on average 1.7428571428571429) internal successors, (732), 421 states have internal predecessors, (732), 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 01:23:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 732 transitions. [2021-11-07 01:23:38,627 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 732 transitions. Word has length 50 [2021-11-07 01:23:38,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:38,628 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 732 transitions. [2021-11-07 01:23:38,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 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 01:23:38,628 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 732 transitions. [2021-11-07 01:23:38,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:23:38,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:38,635 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] [2021-11-07 01:23:38,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:38,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:38,859 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:23:38,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:38,859 INFO L85 PathProgramCache]: Analyzing trace with hash 384288347, now seen corresponding path program 1 times [2021-11-07 01:23:38,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:38,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876883676] [2021-11-07 01:23:38,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:38,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:38,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:38,870 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:38,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:23:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:39,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:23:39,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:39,414 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 01:23:39,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:39,545 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 01:23:39,546 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:39,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876883676] [2021-11-07 01:23:39,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876883676] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:39,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:39,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:23:39,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769873221] [2021-11-07 01:23:39,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:23:39,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:39,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:23:39,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:23:39,553 INFO L87 Difference]: Start difference. First operand 422 states and 732 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 01:23:39,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:39,653 INFO L93 Difference]: Finished difference Result 1236 states and 2148 transitions. [2021-11-07 01:23:39,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:23:39,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 51 [2021-11-07 01:23:39,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:39,662 INFO L225 Difference]: With dead ends: 1236 [2021-11-07 01:23:39,662 INFO L226 Difference]: Without dead ends: 829 [2021-11-07 01:23:39,667 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 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 01:23:39,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-11-07 01:23:39,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 421. [2021-11-07 01:23:39,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 419 states have (on average 1.7350835322195703) internal successors, (727), 420 states have internal predecessors, (727), 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 01:23:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 727 transitions. [2021-11-07 01:23:39,724 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 727 transitions. Word has length 51 [2021-11-07 01:23:39,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:39,725 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 727 transitions. [2021-11-07 01:23:39,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 01:23:39,727 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 727 transitions. [2021-11-07 01:23:39,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:23:39,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:39,736 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] [2021-11-07 01:23:39,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:39,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:39,950 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:23:39,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:39,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1079453761, now seen corresponding path program 1 times [2021-11-07 01:23:39,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:39,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501693489] [2021-11-07 01:23:39,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:39,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:39,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:39,963 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:39,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:23:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:40,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:23:40,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:40,577 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 01:23:40,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:40,764 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 01:23:40,764 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:40,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501693489] [2021-11-07 01:23:40,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501693489] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:40,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:40,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:23:40,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857875196] [2021-11-07 01:23:40,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:23:40,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:40,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:23:40,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:23:40,769 INFO L87 Difference]: Start difference. First operand 421 states and 727 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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 01:23:40,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:41,000 INFO L93 Difference]: Finished difference Result 1601 states and 2770 transitions. [2021-11-07 01:23:41,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:23:41,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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 53 [2021-11-07 01:23:41,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:41,009 INFO L225 Difference]: With dead ends: 1601 [2021-11-07 01:23:41,009 INFO L226 Difference]: Without dead ends: 1198 [2021-11-07 01:23:41,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 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 01:23:41,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2021-11-07 01:23:41,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 420. [2021-11-07 01:23:41,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 418 states have (on average 1.729665071770335) internal successors, (723), 419 states have internal predecessors, (723), 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 01:23:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 723 transitions. [2021-11-07 01:23:41,070 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 723 transitions. Word has length 53 [2021-11-07 01:23:41,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:41,071 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 723 transitions. [2021-11-07 01:23:41,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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 01:23:41,072 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 723 transitions. [2021-11-07 01:23:41,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:23:41,074 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:41,074 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] [2021-11-07 01:23:41,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:41,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:41,298 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:23:41,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:41,301 INFO L85 PathProgramCache]: Analyzing trace with hash -291224812, now seen corresponding path program 1 times [2021-11-07 01:23:41,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:41,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724678647] [2021-11-07 01:23:41,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:41,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:41,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:41,305 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:41,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:23:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:41,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:23:41,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:41,893 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 01:23:41,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:42,052 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 01:23:42,053 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:42,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724678647] [2021-11-07 01:23:42,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724678647] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:42,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:42,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:23:42,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098231816] [2021-11-07 01:23:42,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:23:42,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:42,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:23:42,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:23:42,056 INFO L87 Difference]: Start difference. First operand 420 states and 723 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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 01:23:42,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:42,126 INFO L93 Difference]: Finished difference Result 837 states and 1443 transitions. [2021-11-07 01:23:42,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:23:42,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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 54 [2021-11-07 01:23:42,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:42,130 INFO L225 Difference]: With dead ends: 837 [2021-11-07 01:23:42,130 INFO L226 Difference]: Without dead ends: 425 [2021-11-07 01:23:42,131 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 104 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 01:23:42,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-11-07 01:23:42,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2021-11-07 01:23:42,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 418 states have (on average 1.722488038277512) internal successors, (720), 419 states have internal predecessors, (720), 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 01:23:42,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 720 transitions. [2021-11-07 01:23:42,181 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 720 transitions. Word has length 54 [2021-11-07 01:23:42,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:42,182 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 720 transitions. [2021-11-07 01:23:42,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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 01:23:42,182 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 720 transitions. [2021-11-07 01:23:42,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:23:42,184 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:42,184 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] [2021-11-07 01:23:42,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:42,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:42,398 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:23:42,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:42,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1924560599, now seen corresponding path program 1 times [2021-11-07 01:23:42,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:42,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217471083] [2021-11-07 01:23:42,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:42,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:42,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:42,402 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:42,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:23:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:42,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:23:42,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:43,062 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 01:23:43,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:43,221 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 01:23:43,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:43,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217471083] [2021-11-07 01:23:43,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217471083] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:43,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:43,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:23:43,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527516829] [2021-11-07 01:23:43,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:23:43,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:43,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:23:43,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:23:43,224 INFO L87 Difference]: Start difference. First operand 420 states and 720 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:43,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:43,460 INFO L93 Difference]: Finished difference Result 1588 states and 2746 transitions. [2021-11-07 01:23:43,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:23:43,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:23:43,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:43,468 INFO L225 Difference]: With dead ends: 1588 [2021-11-07 01:23:43,469 INFO L226 Difference]: Without dead ends: 1194 [2021-11-07 01:23:43,470 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 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 01:23:43,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-11-07 01:23:43,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 420. [2021-11-07 01:23:43,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 418 states have (on average 1.715311004784689) internal successors, (717), 419 states have internal predecessors, (717), 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 01:23:43,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 717 transitions. [2021-11-07 01:23:43,509 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 717 transitions. Word has length 55 [2021-11-07 01:23:43,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:43,510 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 717 transitions. [2021-11-07 01:23:43,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:43,510 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 717 transitions. [2021-11-07 01:23:43,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:23:43,511 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:43,512 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 01:23:43,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:43,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:43,730 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:23:43,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:43,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1091848036, now seen corresponding path program 1 times [2021-11-07 01:23:43,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:43,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693752811] [2021-11-07 01:23:43,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:43,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:43,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:43,733 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:43,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:23:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:44,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:23:44,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:44,366 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 01:23:44,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:44,517 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 01:23:44,518 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:44,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693752811] [2021-11-07 01:23:44,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693752811] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:44,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:44,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:23:44,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633274891] [2021-11-07 01:23:44,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:23:44,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:44,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:23:44,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:23:44,519 INFO L87 Difference]: Start difference. First operand 420 states and 717 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 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 01:23:44,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:44,612 INFO L93 Difference]: Finished difference Result 990 states and 1691 transitions. [2021-11-07 01:23:44,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:23:44,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 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 57 [2021-11-07 01:23:44,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:44,618 INFO L225 Difference]: With dead ends: 990 [2021-11-07 01:23:44,618 INFO L226 Difference]: Without dead ends: 814 [2021-11-07 01:23:44,619 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 110 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 01:23:44,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-11-07 01:23:44,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 638. [2021-11-07 01:23:44,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 636 states have (on average 1.7531446540880504) internal successors, (1115), 637 states have internal predecessors, (1115), 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 01:23:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1115 transitions. [2021-11-07 01:23:44,672 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1115 transitions. Word has length 57 [2021-11-07 01:23:44,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:44,672 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1115 transitions. [2021-11-07 01:23:44,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 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 01:23:44,673 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1115 transitions. [2021-11-07 01:23:44,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:23:44,674 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:44,675 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, 1, 1, 1, 1] [2021-11-07 01:23:44,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:44,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:44,890 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:23:44,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:44,891 INFO L85 PathProgramCache]: Analyzing trace with hash 2136097685, now seen corresponding path program 1 times [2021-11-07 01:23:44,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:44,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284822134] [2021-11-07 01:23:44,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:44,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:44,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:44,893 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:44,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:23:45,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:45,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:23:45,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:45,536 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 01:23:45,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:45,692 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 01:23:45,692 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:45,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284822134] [2021-11-07 01:23:45,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284822134] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:45,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:45,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:23:45,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955568464] [2021-11-07 01:23:45,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:23:45,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:45,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:23:45,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:23:45,694 INFO L87 Difference]: Start difference. First operand 638 states and 1115 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:45,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:45,790 INFO L93 Difference]: Finished difference Result 1534 states and 2686 transitions. [2021-11-07 01:23:45,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:23:45,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:23:45,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:45,797 INFO L225 Difference]: With dead ends: 1534 [2021-11-07 01:23:45,797 INFO L226 Difference]: Without dead ends: 980 [2021-11-07 01:23:45,799 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 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 01:23:45,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-11-07 01:23:45,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 804. [2021-11-07 01:23:45,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 802 states have (on average 1.7655860349127181) internal successors, (1416), 803 states have internal predecessors, (1416), 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 01:23:45,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1416 transitions. [2021-11-07 01:23:45,868 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1416 transitions. Word has length 69 [2021-11-07 01:23:45,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:45,868 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 1416 transitions. [2021-11-07 01:23:45,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:45,869 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1416 transitions. [2021-11-07 01:23:45,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:23:45,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:45,871 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, 1, 1, 1, 1, 1] [2021-11-07 01:23:45,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:46,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:46,086 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:23:46,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:46,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1638120500, now seen corresponding path program 1 times [2021-11-07 01:23:46,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:46,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179545056] [2021-11-07 01:23:46,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:46,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:46,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:46,090 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:46,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:23:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:46,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:23:46,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:46,777 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 01:23:46,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:46,954 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 01:23:46,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:46,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179545056] [2021-11-07 01:23:46,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179545056] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:46,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:46,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:23:46,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875994912] [2021-11-07 01:23:46,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:23:46,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:46,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:23:46,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:23:46,957 INFO L87 Difference]: Start difference. First operand 804 states and 1416 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 01:23:47,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:47,075 INFO L93 Difference]: Finished difference Result 2064 states and 3654 transitions. [2021-11-07 01:23:47,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:23:47,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 70 [2021-11-07 01:23:47,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:47,085 INFO L225 Difference]: With dead ends: 2064 [2021-11-07 01:23:47,085 INFO L226 Difference]: Without dead ends: 1352 [2021-11-07 01:23:47,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 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 01:23:47,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-11-07 01:23:47,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1176. [2021-11-07 01:23:47,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1174 states have (on average 1.7836456558773424) internal successors, (2094), 1175 states have internal predecessors, (2094), 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 01:23:47,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 2094 transitions. [2021-11-07 01:23:47,197 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 2094 transitions. Word has length 70 [2021-11-07 01:23:47,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:47,197 INFO L470 AbstractCegarLoop]: Abstraction has 1176 states and 2094 transitions. [2021-11-07 01:23:47,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 01:23:47,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 2094 transitions. [2021-11-07 01:23:47,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:23:47,201 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:47,201 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, 1, 1, 1, 1, 1, 1] [2021-11-07 01:23:47,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:47,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:47,414 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:23:47,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:47,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1858639171, now seen corresponding path program 1 times [2021-11-07 01:23:47,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:47,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677317663] [2021-11-07 01:23:47,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:47,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:47,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:47,416 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:47,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:23:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:47,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:23:47,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:48,078 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 01:23:48,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:48,270 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 01:23:48,271 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:48,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677317663] [2021-11-07 01:23:48,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677317663] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:48,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:48,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:23:48,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023761779] [2021-11-07 01:23:48,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:23:48,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:48,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:23:48,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:23:48,273 INFO L87 Difference]: Start difference. First operand 1176 states and 2094 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:48,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:48,421 INFO L93 Difference]: Finished difference Result 3160 states and 5657 transitions. [2021-11-07 01:23:48,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:23:48,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:23:48,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:48,435 INFO L225 Difference]: With dead ends: 3160 [2021-11-07 01:23:48,435 INFO L226 Difference]: Without dead ends: 2084 [2021-11-07 01:23:48,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 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 01:23:48,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2021-11-07 01:23:48,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1908. [2021-11-07 01:23:48,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1906 states have (on average 1.7990556138509968) internal successors, (3429), 1907 states have internal predecessors, (3429), 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 01:23:48,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 3429 transitions. [2021-11-07 01:23:48,593 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 3429 transitions. Word has length 71 [2021-11-07 01:23:48,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:48,594 INFO L470 AbstractCegarLoop]: Abstraction has 1908 states and 3429 transitions. [2021-11-07 01:23:48,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:48,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 3429 transitions. [2021-11-07 01:23:48,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:23:48,598 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:48,598 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:23:48,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:48,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:48,817 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:23:48,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:48,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1594699069, now seen corresponding path program 1 times [2021-11-07 01:23:48,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:48,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914654768] [2021-11-07 01:23:48,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:48,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:48,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:48,819 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:48,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:23:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:49,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:23:49,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:49,562 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 01:23:49,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:49,736 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 01:23:49,736 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:49,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914654768] [2021-11-07 01:23:49,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914654768] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:49,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:49,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:23:49,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310784327] [2021-11-07 01:23:49,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:23:49,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:49,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:23:49,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:23:49,741 INFO L87 Difference]: Start difference. First operand 1908 states and 3429 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 01:23:49,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:49,963 INFO L93 Difference]: Finished difference Result 5092 states and 9181 transitions. [2021-11-07 01:23:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:23:49,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 72 [2021-11-07 01:23:49,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:49,985 INFO L225 Difference]: With dead ends: 5092 [2021-11-07 01:23:49,985 INFO L226 Difference]: Without dead ends: 3318 [2021-11-07 01:23:49,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 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 01:23:49,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2021-11-07 01:23:50,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 3142. [2021-11-07 01:23:50,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3140 states have (on average 1.8070063694267515) internal successors, (5674), 3141 states have internal predecessors, (5674), 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 01:23:50,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 5674 transitions. [2021-11-07 01:23:50,237 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 5674 transitions. Word has length 72 [2021-11-07 01:23:50,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:50,237 INFO L470 AbstractCegarLoop]: Abstraction has 3142 states and 5674 transitions. [2021-11-07 01:23:50,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 01:23:50,238 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 5674 transitions. [2021-11-07 01:23:50,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:23:50,243 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:50,243 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:23:50,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:50,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:50,462 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:23:50,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:50,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1883013452, now seen corresponding path program 1 times [2021-11-07 01:23:50,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:50,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751027950] [2021-11-07 01:23:50,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:50,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:50,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:50,464 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:50,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:23:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:51,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:23:51,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:51,201 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 01:23:51,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:51,390 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 01:23:51,390 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:51,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751027950] [2021-11-07 01:23:51,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751027950] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:51,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:51,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:23:51,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014537919] [2021-11-07 01:23:51,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:23:51,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:51,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:23:51,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:23:51,393 INFO L87 Difference]: Start difference. First operand 3142 states and 5674 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:51,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:51,767 INFO L93 Difference]: Finished difference Result 8510 states and 15399 transitions. [2021-11-07 01:23:51,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:23:51,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:23:51,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:51,802 INFO L225 Difference]: With dead ends: 8510 [2021-11-07 01:23:51,802 INFO L226 Difference]: Without dead ends: 5536 [2021-11-07 01:23:51,807 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 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 01:23:51,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5536 states. [2021-11-07 01:23:52,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5536 to 5360. [2021-11-07 01:23:52,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5360 states, 5358 states have (on average 1.8101903695408734) internal successors, (9699), 5359 states have internal predecessors, (9699), 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 01:23:52,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5360 states to 5360 states and 9699 transitions. [2021-11-07 01:23:52,222 INFO L78 Accepts]: Start accepts. Automaton has 5360 states and 9699 transitions. Word has length 73 [2021-11-07 01:23:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:52,223 INFO L470 AbstractCegarLoop]: Abstraction has 5360 states and 9699 transitions. [2021-11-07 01:23:52,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:52,224 INFO L276 IsEmpty]: Start isEmpty. Operand 5360 states and 9699 transitions. [2021-11-07 01:23:52,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:23:52,232 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:52,232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:23:52,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:52,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:52,447 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:23:52,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:52,448 INFO L85 PathProgramCache]: Analyzing trace with hash -419679468, now seen corresponding path program 1 times [2021-11-07 01:23:52,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:52,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005862488] [2021-11-07 01:23:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:52,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:52,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:52,449 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:52,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:23:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:53,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:23:53,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:53,188 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 01:23:53,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:53,371 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 01:23:53,371 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:53,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005862488] [2021-11-07 01:23:53,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005862488] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:53,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:53,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:23:53,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358260815] [2021-11-07 01:23:53,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:23:53,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:53,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:23:53,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:23:53,373 INFO L87 Difference]: Start difference. First operand 5360 states and 9699 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:54,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:54,060 INFO L93 Difference]: Finished difference Result 15490 states and 28085 transitions. [2021-11-07 01:23:54,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:23:54,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:23:54,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:54,111 INFO L225 Difference]: With dead ends: 15490 [2021-11-07 01:23:54,111 INFO L226 Difference]: Without dead ends: 10306 [2021-11-07 01:23:54,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 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 01:23:54,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10306 states. [2021-11-07 01:23:54,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10306 to 10130. [2021-11-07 01:23:54,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10130 states, 10128 states have (on average 1.8124012638230649) internal successors, (18356), 10129 states have internal predecessors, (18356), 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 01:23:54,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10130 states to 10130 states and 18356 transitions. [2021-11-07 01:23:54,845 INFO L78 Accepts]: Start accepts. Automaton has 10130 states and 18356 transitions. Word has length 74 [2021-11-07 01:23:54,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:54,845 INFO L470 AbstractCegarLoop]: Abstraction has 10130 states and 18356 transitions. [2021-11-07 01:23:54,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:54,845 INFO L276 IsEmpty]: Start isEmpty. Operand 10130 states and 18356 transitions. [2021-11-07 01:23:54,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:23:54,854 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:54,854 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:23:54,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:55,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:55,069 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:23:55,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:55,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1636534780, now seen corresponding path program 1 times [2021-11-07 01:23:55,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:55,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322838713] [2021-11-07 01:23:55,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:55,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:55,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:55,072 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:55,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:23:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:55,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:23:55,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:56,015 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 01:23:56,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:56,235 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 01:23:56,235 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:56,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322838713] [2021-11-07 01:23:56,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322838713] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:56,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:56,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:23:56,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773938642] [2021-11-07 01:23:56,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:23:56,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:56,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:23:56,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:23:56,237 INFO L87 Difference]: Start difference. First operand 10130 states and 18356 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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 01:23:59,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:59,303 INFO L93 Difference]: Finished difference Result 24949 states and 45221 transitions. [2021-11-07 01:23:59,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:23:59,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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 75 [2021-11-07 01:23:59,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:59,347 INFO L225 Difference]: With dead ends: 24949 [2021-11-07 01:23:59,347 INFO L226 Difference]: Without dead ends: 15073 [2021-11-07 01:23:59,362 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 144 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 01:23:59,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15073 states. [2021-11-07 01:24:00,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15073 to 10097. [2021-11-07 01:24:00,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10097 states, 10095 states have (on average 1.8052501238236751) internal successors, (18224), 10096 states have internal predecessors, (18224), 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 01:24:00,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10097 states to 10097 states and 18224 transitions. [2021-11-07 01:24:00,178 INFO L78 Accepts]: Start accepts. Automaton has 10097 states and 18224 transitions. Word has length 75 [2021-11-07 01:24:00,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:00,178 INFO L470 AbstractCegarLoop]: Abstraction has 10097 states and 18224 transitions. [2021-11-07 01:24:00,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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 01:24:00,179 INFO L276 IsEmpty]: Start isEmpty. Operand 10097 states and 18224 transitions. [2021-11-07 01:24:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:24:00,188 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:00,188 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:00,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:24:00,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:00,403 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:00,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:00,404 INFO L85 PathProgramCache]: Analyzing trace with hash 112762467, now seen corresponding path program 1 times [2021-11-07 01:24:00,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:00,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859005003] [2021-11-07 01:24:00,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:00,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:00,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:00,407 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:00,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:24:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:01,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:24:01,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:01,246 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 01:24:01,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:01,415 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 01:24:01,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:01,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859005003] [2021-11-07 01:24:01,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859005003] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:01,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:01,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:24:01,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449253888] [2021-11-07 01:24:01,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:24:01,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:01,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:24:01,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:24:01,417 INFO L87 Difference]: Start difference. First operand 10097 states and 18224 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:02,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:02,493 INFO L93 Difference]: Finished difference Result 29533 states and 53367 transitions. [2021-11-07 01:24:02,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:24:02,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:24:02,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:02,544 INFO L225 Difference]: With dead ends: 29533 [2021-11-07 01:24:02,544 INFO L226 Difference]: Without dead ends: 19619 [2021-11-07 01:24:02,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 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 01:24:02,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19619 states. [2021-11-07 01:24:03,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19619 to 19443. [2021-11-07 01:24:03,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19443 states, 19441 states have (on average 1.8048968674450903) internal successors, (35089), 19442 states have internal predecessors, (35089), 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 01:24:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19443 states to 19443 states and 35089 transitions. [2021-11-07 01:24:03,696 INFO L78 Accepts]: Start accepts. Automaton has 19443 states and 35089 transitions. Word has length 75 [2021-11-07 01:24:03,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:03,696 INFO L470 AbstractCegarLoop]: Abstraction has 19443 states and 35089 transitions. [2021-11-07 01:24:03,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:03,696 INFO L276 IsEmpty]: Start isEmpty. Operand 19443 states and 35089 transitions. [2021-11-07 01:24:03,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:24:03,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:03,707 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:03,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:03,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:03,922 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:03,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:03,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1327055139, now seen corresponding path program 1 times [2021-11-07 01:24:03,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:03,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35701608] [2021-11-07 01:24:03,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:03,923 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:03,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:03,924 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:03,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:24:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:04,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:24:04,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:04,704 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 01:24:04,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:04,861 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 01:24:04,861 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:04,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35701608] [2021-11-07 01:24:04,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35701608] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:04,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:04,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:24:04,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234951333] [2021-11-07 01:24:04,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:24:04,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:04,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:24:04,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:24:04,863 INFO L87 Difference]: Start difference. First operand 19443 states and 35089 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 01:24:06,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:06,366 INFO L93 Difference]: Finished difference Result 57757 states and 104276 transitions. [2021-11-07 01:24:06,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:24:06,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 76 [2021-11-07 01:24:06,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:06,470 INFO L225 Difference]: With dead ends: 57757 [2021-11-07 01:24:06,470 INFO L226 Difference]: Without dead ends: 38501 [2021-11-07 01:24:06,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 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 01:24:06,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38501 states. [2021-11-07 01:24:08,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38501 to 38325. [2021-11-07 01:24:08,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38325 states, 38323 states have (on average 1.802416303525298) internal successors, (69074), 38324 states have internal predecessors, (69074), 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 01:24:08,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38325 states to 38325 states and 69074 transitions. [2021-11-07 01:24:08,650 INFO L78 Accepts]: Start accepts. Automaton has 38325 states and 69074 transitions. Word has length 76 [2021-11-07 01:24:08,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:08,650 INFO L470 AbstractCegarLoop]: Abstraction has 38325 states and 69074 transitions. [2021-11-07 01:24:08,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 01:24:08,651 INFO L276 IsEmpty]: Start isEmpty. Operand 38325 states and 69074 transitions. [2021-11-07 01:24:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:24:08,663 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:08,664 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:08,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:08,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:08,883 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:08,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:08,883 INFO L85 PathProgramCache]: Analyzing trace with hash -465632694, now seen corresponding path program 1 times [2021-11-07 01:24:08,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:08,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431330413] [2021-11-07 01:24:08,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:08,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:08,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:08,884 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:08,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:24:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:09,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:24:09,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:09,797 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 01:24:09,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:10,043 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 01:24:10,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:10,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431330413] [2021-11-07 01:24:10,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431330413] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:10,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:10,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:24:10,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387730615] [2021-11-07 01:24:10,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:24:10,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:10,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:24:10,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:24:10,045 INFO L87 Difference]: Start difference. First operand 38325 states and 69074 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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 01:24:16,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:16,693 INFO L93 Difference]: Finished difference Result 148697 states and 267843 transitions. [2021-11-07 01:24:16,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:24:16,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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 77 [2021-11-07 01:24:16,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:16,933 INFO L225 Difference]: With dead ends: 148697 [2021-11-07 01:24:16,933 INFO L226 Difference]: Without dead ends: 110625 [2021-11-07 01:24:16,973 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:24:17,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110625 states. [2021-11-07 01:24:19,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110625 to 38067. [2021-11-07 01:24:19,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38067 states, 38065 states have (on average 1.7875213450676475) internal successors, (68042), 38066 states have internal predecessors, (68042), 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 01:24:20,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38067 states to 38067 states and 68042 transitions. [2021-11-07 01:24:20,035 INFO L78 Accepts]: Start accepts. Automaton has 38067 states and 68042 transitions. Word has length 77 [2021-11-07 01:24:20,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:20,035 INFO L470 AbstractCegarLoop]: Abstraction has 38067 states and 68042 transitions. [2021-11-07 01:24:20,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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 01:24:20,036 INFO L276 IsEmpty]: Start isEmpty. Operand 38067 states and 68042 transitions. [2021-11-07 01:24:20,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:24:20,046 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:20,046 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:20,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:20,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:20,256 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:20,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:20,256 INFO L85 PathProgramCache]: Analyzing trace with hash -756717464, now seen corresponding path program 1 times [2021-11-07 01:24:20,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:20,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311195840] [2021-11-07 01:24:20,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:20,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:20,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:20,258 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:20,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:24:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:20,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:24:20,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:21,139 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 01:24:21,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:21,304 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 01:24:21,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:21,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311195840] [2021-11-07 01:24:21,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311195840] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:21,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:21,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:24:21,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554296222] [2021-11-07 01:24:21,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:24:21,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:21,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:24:21,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:24:21,307 INFO L87 Difference]: Start difference. First operand 38067 states and 68042 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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 01:24:23,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:23,189 INFO L93 Difference]: Finished difference Result 76051 states and 135944 transitions. [2021-11-07 01:24:23,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:24:23,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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 77 [2021-11-07 01:24:23,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:23,258 INFO L225 Difference]: With dead ends: 76051 [2021-11-07 01:24:23,259 INFO L226 Difference]: Without dead ends: 38243 [2021-11-07 01:24:23,286 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 150 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 01:24:23,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38243 states. [2021-11-07 01:24:25,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38243 to 38067. [2021-11-07 01:24:25,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38067 states, 38065 states have (on average 1.7841586759490347) internal successors, (67914), 38066 states have internal predecessors, (67914), 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 01:24:25,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38067 states to 38067 states and 67914 transitions. [2021-11-07 01:24:25,541 INFO L78 Accepts]: Start accepts. Automaton has 38067 states and 67914 transitions. Word has length 77 [2021-11-07 01:24:25,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:25,541 INFO L470 AbstractCegarLoop]: Abstraction has 38067 states and 67914 transitions. [2021-11-07 01:24:25,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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 01:24:25,541 INFO L276 IsEmpty]: Start isEmpty. Operand 38067 states and 67914 transitions. [2021-11-07 01:24:25,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:24:25,551 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:25,551 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:25,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:25,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:25,752 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:25,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:25,752 INFO L85 PathProgramCache]: Analyzing trace with hash 844653525, now seen corresponding path program 1 times [2021-11-07 01:24:25,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:25,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000485836] [2021-11-07 01:24:25,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:25,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:25,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:25,754 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:25,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:24:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:26,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:24:26,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:26,639 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 01:24:26,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:26,834 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 01:24:26,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:26,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000485836] [2021-11-07 01:24:26,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000485836] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:26,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:26,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:24:26,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338359613] [2021-11-07 01:24:26,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:24:26,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:26,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:24:26,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:24:26,837 INFO L87 Difference]: Start difference. First operand 38067 states and 67914 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:30,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:30,017 INFO L93 Difference]: Finished difference Result 105789 states and 188370 transitions. [2021-11-07 01:24:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:24:30,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:24:30,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:30,135 INFO L225 Difference]: With dead ends: 105789 [2021-11-07 01:24:30,136 INFO L226 Difference]: Without dead ends: 67941 [2021-11-07 01:24:30,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 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 01:24:30,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67941 states. [2021-11-07 01:24:33,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67941 to 67765. [2021-11-07 01:24:33,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67765 states, 67763 states have (on average 1.7748181160810472) internal successors, (120267), 67764 states have internal predecessors, (120267), 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 01:24:33,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67765 states to 67765 states and 120267 transitions. [2021-11-07 01:24:33,935 INFO L78 Accepts]: Start accepts. Automaton has 67765 states and 120267 transitions. Word has length 77 [2021-11-07 01:24:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:33,936 INFO L470 AbstractCegarLoop]: Abstraction has 67765 states and 120267 transitions. [2021-11-07 01:24:33,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:33,936 INFO L276 IsEmpty]: Start isEmpty. Operand 67765 states and 120267 transitions. [2021-11-07 01:24:33,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:24:33,945 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:33,945 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:33,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:34,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:34,146 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:34,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:34,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1678974126, now seen corresponding path program 1 times [2021-11-07 01:24:34,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:34,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322825404] [2021-11-07 01:24:34,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:34,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:34,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:34,148 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:34,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:24:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:34,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:24:34,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:35,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:24:35,353 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:35,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322825404] [2021-11-07 01:24:35,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322825404] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:24:35,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1794188260] [2021-11-07 01:24:35,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:35,354 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:24:35,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:24:35,361 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:24:35,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac953f2-a2dd-48b4-8291-c9c57c1a438e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:24:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:36,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:24:36,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:24:37,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:24:37,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1794188260] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:37,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:24:37,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:24:37,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325735016] [2021-11-07 01:24:37,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:24:37,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:37,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:24:37,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:24:37,434 INFO L87 Difference]: Start difference. First operand 67765 states and 120267 transitions. Second operand has 16 states, 16 states have (on average 7.6875) internal successors, (123), 15 states have internal predecessors, (123), 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)