./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec7_product18.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_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/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_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/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_b0251a6d-25f9-4758-bb2c-18d4bacdea56/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 f70ac21a1decd51d5f9571a5be4450629a9ca28f5aa1158e9564f33ba44bf6ef --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:21:09,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:21:09,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:21:09,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:21:09,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:21:09,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:21:09,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:21:09,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:21:09,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:21:09,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:21:09,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:21:09,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:21:09,576 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:21:09,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:21:09,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:21:09,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:21:09,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:21:09,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:21:09,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:21:09,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:21:09,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:21:09,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:21:09,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:21:09,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:21:09,629 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:21:09,630 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:21:09,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:21:09,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:21:09,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:21:09,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:21:09,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:21:09,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:21:09,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:21:09,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:21:09,647 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:21:09,647 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:21:09,648 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:21:09,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:21:09,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:21:09,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:21:09,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:21:09,653 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:21:09,711 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:21:09,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:21:09,714 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:21:09,714 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:21:09,715 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:21:09,715 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:21:09,715 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:21:09,716 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:21:09,724 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:21:09,724 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:21:09,726 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:21:09,726 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:21:09,727 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:21:09,727 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:21:09,727 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:21:09,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:21:09,729 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:21:09,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:21:09,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:21:09,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:21:09,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:21:09,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:21:09,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:21:09,731 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:21:09,731 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:21:09,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:21:09,732 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:21:09,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:21:09,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:21:09,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:21:09,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:21:09,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:21:09,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:21:09,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:21:09,737 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:21:09,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:21:09,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:21:09,738 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:21:09,738 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:21:09,738 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_b0251a6d-25f9-4758-bb2c-18d4bacdea56/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f70ac21a1decd51d5f9571a5be4450629a9ca28f5aa1158e9564f33ba44bf6ef [2021-11-07 01:21:10,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:21:10,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:21:10,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:21:10,181 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:21:10,182 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:21:10,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec7_product18.cil.c [2021-11-07 01:21:10,288 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/data/018c7baf7/a5863a2f7bd14c90ad8e76e5fc8651af/FLAG64e579e6e [2021-11-07 01:21:11,092 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:21:11,093 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/sv-benchmarks/c/product-lines/email_spec7_product18.cil.c [2021-11-07 01:21:11,140 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/data/018c7baf7/a5863a2f7bd14c90ad8e76e5fc8651af/FLAG64e579e6e [2021-11-07 01:21:11,268 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/data/018c7baf7/a5863a2f7bd14c90ad8e76e5fc8651af [2021-11-07 01:21:11,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:21:11,272 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:21:11,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:21:11,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:21:11,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:21:11,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:21:11" (1/1) ... [2021-11-07 01:21:11,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6399fbde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:11, skipping insertion in model container [2021-11-07 01:21:11,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:21:11" (1/1) ... [2021-11-07 01:21:11,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:21:11,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:21:12,070 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_b0251a6d-25f9-4758-bb2c-18d4bacdea56/sv-benchmarks/c/product-lines/email_spec7_product18.cil.c[45803,45816] [2021-11-07 01:21:12,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:21:12,186 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 01:21:12,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@57774064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:12, skipping insertion in model container [2021-11-07 01:21:12,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:21:12,188 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:21:12,191 INFO L168 Benchmark]: Toolchain (without parser) took 916.82 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 57.2 MB in the beginning and 74.8 MB in the end (delta: -17.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:21:12,192 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 94.4 MB. Free memory was 67.0 MB in the beginning and 66.9 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:21:12,193 INFO L168 Benchmark]: CACSL2BoogieTranslator took 913.27 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 57.0 MB in the beginning and 74.8 MB in the end (delta: -17.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:21:12,196 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 94.4 MB. Free memory was 67.0 MB in the beginning and 66.9 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 913.27 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 57.0 MB in the beginning and 74.8 MB in the end (delta: -17.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 95]: 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_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/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_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/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_b0251a6d-25f9-4758-bb2c-18d4bacdea56/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 f70ac21a1decd51d5f9571a5be4450629a9ca28f5aa1158e9564f33ba44bf6ef --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:21:15,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:21:15,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:21:15,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:21:15,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:21:15,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:21:15,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:21:15,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:21:15,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:21:15,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:21:15,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:21:15,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:21:15,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:21:15,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:21:15,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:21:15,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:21:15,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:21:15,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:21:15,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:21:15,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:21:15,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:21:15,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:21:15,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:21:15,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:21:15,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:21:15,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:21:15,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:21:15,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:21:15,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:21:15,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:21:15,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:21:15,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:21:15,474 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:21:15,475 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:21:15,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:21:15,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:21:15,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:21:15,479 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:21:15,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:21:15,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:21:15,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:21:15,490 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:21:15,548 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:21:15,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:21:15,550 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:21:15,551 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:21:15,551 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:21:15,551 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:21:15,552 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:21:15,552 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:21:15,552 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:21:15,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:21:15,556 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:21:15,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:21:15,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:21:15,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:21:15,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:21:15,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:21:15,558 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:21:15,558 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:21:15,558 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:21:15,559 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:21:15,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:21:15,559 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:21:15,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:21:15,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:21:15,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:21:15,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:21:15,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:21:15,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:21:15,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:21:15,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:21:15,562 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:21:15,562 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:21:15,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:21:15,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:21:15,564 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:21:15,564 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_b0251a6d-25f9-4758-bb2c-18d4bacdea56/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f70ac21a1decd51d5f9571a5be4450629a9ca28f5aa1158e9564f33ba44bf6ef [2021-11-07 01:21:16,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:21:16,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:21:16,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:21:16,138 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:21:16,139 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:21:16,142 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec7_product18.cil.c [2021-11-07 01:21:16,237 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/data/cf4b58599/25531e1e70a241f0a12bb6c1559d4679/FLAGeac1a7f25 [2021-11-07 01:21:17,105 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:21:17,105 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/sv-benchmarks/c/product-lines/email_spec7_product18.cil.c [2021-11-07 01:21:17,133 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/data/cf4b58599/25531e1e70a241f0a12bb6c1559d4679/FLAGeac1a7f25 [2021-11-07 01:21:17,267 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/data/cf4b58599/25531e1e70a241f0a12bb6c1559d4679 [2021-11-07 01:21:17,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:21:17,272 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:21:17,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:21:17,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:21:17,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:21:17,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:21:17" (1/1) ... [2021-11-07 01:21:17,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@699c496f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:17, skipping insertion in model container [2021-11-07 01:21:17,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:21:17" (1/1) ... [2021-11-07 01:21:17,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:21:17,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:21:17,994 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_b0251a6d-25f9-4758-bb2c-18d4bacdea56/sv-benchmarks/c/product-lines/email_spec7_product18.cil.c[45803,45816] [2021-11-07 01:21:18,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:21:18,111 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:21:18,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:21:18,296 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_b0251a6d-25f9-4758-bb2c-18d4bacdea56/sv-benchmarks/c/product-lines/email_spec7_product18.cil.c[45803,45816] [2021-11-07 01:21:18,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:21:18,371 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:21:18,471 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_b0251a6d-25f9-4758-bb2c-18d4bacdea56/sv-benchmarks/c/product-lines/email_spec7_product18.cil.c[45803,45816] [2021-11-07 01:21:18,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:21:18,585 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:21:18,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:18 WrapperNode [2021-11-07 01:21:18,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:21:18,587 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:21:18,588 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:21:18,588 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:21:18,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:18" (1/1) ... [2021-11-07 01:21:18,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:18" (1/1) ... [2021-11-07 01:21:18,785 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:21:18,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:21:18,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:21:18,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:21:18,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:18" (1/1) ... [2021-11-07 01:21:18,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:18" (1/1) ... [2021-11-07 01:21:18,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:18" (1/1) ... [2021-11-07 01:21:18,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:18" (1/1) ... [2021-11-07 01:21:18,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:18" (1/1) ... [2021-11-07 01:21:18,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:18" (1/1) ... [2021-11-07 01:21:18,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:18" (1/1) ... [2021-11-07 01:21:18,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:21:18,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:21:18,911 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:21:18,911 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:21:18,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:18" (1/1) ... [2021-11-07 01:21:18,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:21:18,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:21:18,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:21:18,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:21:19,074 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:21:19,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:21:19,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:21:19,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:21:19,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:21:23,968 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:21:23,968 INFO L299 CfgBuilder]: Removed 259 assume(true) statements. [2021-11-07 01:21:23,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:21:23 BoogieIcfgContainer [2021-11-07 01:21:23,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:21:23,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:21:23,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:21:23,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:21:23,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:21:17" (1/3) ... [2021-11-07 01:21:23,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@151b3ce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:21:23, skipping insertion in model container [2021-11-07 01:21:23,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:18" (2/3) ... [2021-11-07 01:21:23,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@151b3ce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:21:23, skipping insertion in model container [2021-11-07 01:21:23,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:21:23" (3/3) ... [2021-11-07 01:21:23,995 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec7_product18.cil.c [2021-11-07 01:21:24,002 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:21:24,002 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:21:24,087 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:21:24,099 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 01:21:24,100 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:21:24,150 INFO L276 IsEmpty]: Start isEmpty. Operand has 397 states, 394 states have (on average 1.7614213197969544) internal successors, (694), 396 states have internal predecessors, (694), 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 01:21:24,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 01:21:24,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:24,176 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:24,177 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:24,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:24,190 INFO L85 PathProgramCache]: Analyzing trace with hash 931063604, now seen corresponding path program 1 times [2021-11-07 01:21:24,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:24,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779763148] [2021-11-07 01:21:24,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:24,212 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:24,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:24,218 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:24,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:21:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:24,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:21:24,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:24,945 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 01:21:24,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:25,152 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 01:21:25,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:25,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779763148] [2021-11-07 01:21:25,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779763148] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:25,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:25,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:21:25,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426924471] [2021-11-07 01:21:25,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:21:25,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:25,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:21:25,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:21:25,205 INFO L87 Difference]: Start difference. First operand has 397 states, 394 states have (on average 1.7614213197969544) internal successors, (694), 396 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:25,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:25,289 INFO L93 Difference]: Finished difference Result 552 states and 947 transitions. [2021-11-07 01:21:25,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:21:25,291 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 01:21:25,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:25,311 INFO L225 Difference]: With dead ends: 552 [2021-11-07 01:21:25,311 INFO L226 Difference]: Without dead ends: 349 [2021-11-07 01:21:25,316 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:21:25,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-11-07 01:21:25,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2021-11-07 01:21:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 347 states have (on average 1.755043227665706) internal successors, (609), 348 states have internal predecessors, (609), 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 01:21:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 609 transitions. [2021-11-07 01:21:25,397 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 609 transitions. Word has length 38 [2021-11-07 01:21:25,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:25,398 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 609 transitions. [2021-11-07 01:21:25,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:25,399 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 609 transitions. [2021-11-07 01:21:25,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 01:21:25,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:25,404 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:25,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:25,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:25,612 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:25,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:25,613 INFO L85 PathProgramCache]: Analyzing trace with hash -169093727, now seen corresponding path program 1 times [2021-11-07 01:21:25,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:25,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854226969] [2021-11-07 01:21:25,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:25,616 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:25,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:25,620 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:25,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:21:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:26,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:21:26,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:26,346 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 01:21:26,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:26,492 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 01:21:26,492 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:26,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854226969] [2021-11-07 01:21:26,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854226969] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:26,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:26,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:21:26,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969194622] [2021-11-07 01:21:26,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:21:26,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:26,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:21:26,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:21:26,503 INFO L87 Difference]: Start difference. First operand 349 states and 609 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:26,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:26,661 INFO L93 Difference]: Finished difference Result 1017 states and 1779 transitions. [2021-11-07 01:21:26,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:21:26,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-07 01:21:26,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:26,671 INFO L225 Difference]: With dead ends: 1017 [2021-11-07 01:21:26,672 INFO L226 Difference]: Without dead ends: 683 [2021-11-07 01:21:26,680 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:21:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-11-07 01:21:26,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 348. [2021-11-07 01:21:26,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 346 states have (on average 1.745664739884393) internal successors, (604), 347 states have internal predecessors, (604), 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 01:21:26,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 604 transitions. [2021-11-07 01:21:26,757 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 604 transitions. Word has length 39 [2021-11-07 01:21:26,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:26,759 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 604 transitions. [2021-11-07 01:21:26,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:26,760 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 604 transitions. [2021-11-07 01:21:26,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 01:21:26,774 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:26,774 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:26,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:26,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:26,975 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:26,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:26,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1428316295, now seen corresponding path program 1 times [2021-11-07 01:21:26,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:26,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577340978] [2021-11-07 01:21:26,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:26,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:26,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:26,985 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:27,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:21:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:27,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:21:27,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:27,668 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 01:21:27,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:27,838 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 01:21:27,838 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:27,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577340978] [2021-11-07 01:21:27,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577340978] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:27,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:27,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:21:27,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620296558] [2021-11-07 01:21:27,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:21:27,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:27,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:21:27,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:21:27,842 INFO L87 Difference]: Start difference. First operand 348 states and 604 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:28,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:28,147 INFO L93 Difference]: Finished difference Result 1309 states and 2278 transitions. [2021-11-07 01:21:28,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:21:28,148 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 01:21:28,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:28,159 INFO L225 Difference]: With dead ends: 1309 [2021-11-07 01:21:28,160 INFO L226 Difference]: Without dead ends: 979 [2021-11-07 01:21:28,161 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:21:28,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-11-07 01:21:28,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 347. [2021-11-07 01:21:28,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 345 states have (on average 1.7391304347826086) internal successors, (600), 346 states have internal predecessors, (600), 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 01:21:28,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 600 transitions. [2021-11-07 01:21:28,212 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 600 transitions. Word has length 41 [2021-11-07 01:21:28,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:28,213 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 600 transitions. [2021-11-07 01:21:28,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:28,214 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 600 transitions. [2021-11-07 01:21:28,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 01:21:28,218 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:28,219 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:28,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:28,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:28,436 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:28,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:28,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1387978714, now seen corresponding path program 1 times [2021-11-07 01:21:28,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:28,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911368578] [2021-11-07 01:21:28,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:28,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:28,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:28,442 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:28,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:21:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:28,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:21:28,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:29,164 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 01:21:29,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:29,327 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 01:21:29,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:29,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911368578] [2021-11-07 01:21:29,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911368578] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:29,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:29,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:21:29,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306935262] [2021-11-07 01:21:29,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:21:29,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:29,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:21:29,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:21:29,335 INFO L87 Difference]: Start difference. First operand 347 states and 600 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:29,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:29,409 INFO L93 Difference]: Finished difference Result 691 states and 1197 transitions. [2021-11-07 01:21:29,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:21:29,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-07 01:21:29,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:29,414 INFO L225 Difference]: With dead ends: 691 [2021-11-07 01:21:29,414 INFO L226 Difference]: Without dead ends: 352 [2021-11-07 01:21:29,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:21:29,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-07 01:21:29,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 347. [2021-11-07 01:21:29,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 345 states have (on average 1.7304347826086957) internal successors, (597), 346 states have internal predecessors, (597), 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 01:21:29,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 597 transitions. [2021-11-07 01:21:29,461 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 597 transitions. Word has length 42 [2021-11-07 01:21:29,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:29,461 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 597 transitions. [2021-11-07 01:21:29,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:29,462 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 597 transitions. [2021-11-07 01:21:29,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 01:21:29,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:29,464 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:29,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:29,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:29,683 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:29,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:29,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1456415377, now seen corresponding path program 1 times [2021-11-07 01:21:29,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:29,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993181407] [2021-11-07 01:21:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:29,685 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:29,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:29,686 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:29,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:21:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:30,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:21:30,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:30,378 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 01:21:30,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:30,537 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 01:21:30,537 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:30,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993181407] [2021-11-07 01:21:30,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993181407] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:30,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:30,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:21:30,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206767846] [2021-11-07 01:21:30,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:21:30,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:30,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:21:30,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:21:30,541 INFO L87 Difference]: Start difference. First operand 347 states and 597 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:30,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:30,826 INFO L93 Difference]: Finished difference Result 1296 states and 2254 transitions. [2021-11-07 01:21:30,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:21:30,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-07 01:21:30,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:30,835 INFO L225 Difference]: With dead ends: 1296 [2021-11-07 01:21:30,835 INFO L226 Difference]: Without dead ends: 975 [2021-11-07 01:21:30,837 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:21:30,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-11-07 01:21:30,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 347. [2021-11-07 01:21:30,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 345 states have (on average 1.7217391304347827) internal successors, (594), 346 states have internal predecessors, (594), 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 01:21:30,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 594 transitions. [2021-11-07 01:21:30,880 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 594 transitions. Word has length 43 [2021-11-07 01:21:30,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:30,883 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 594 transitions. [2021-11-07 01:21:30,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:30,883 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 594 transitions. [2021-11-07 01:21:30,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:21:30,885 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:30,885 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:30,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:31,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:31,100 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:31,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:31,101 INFO L85 PathProgramCache]: Analyzing trace with hash -866984918, now seen corresponding path program 1 times [2021-11-07 01:21:31,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:31,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881266630] [2021-11-07 01:21:31,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:31,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:31,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:31,106 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:31,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:21:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:31,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:21:31,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:31,811 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 01:21:31,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:31,980 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 01:21:31,981 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:31,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881266630] [2021-11-07 01:21:31,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881266630] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:31,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:31,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:21:31,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865591021] [2021-11-07 01:21:31,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:21:31,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:31,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:21:31,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:21:31,985 INFO L87 Difference]: Start difference. First operand 347 states and 594 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:32,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:32,111 INFO L93 Difference]: Finished difference Result 775 states and 1329 transitions. [2021-11-07 01:21:32,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:21:32,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 01:21:32,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:32,119 INFO L225 Difference]: With dead ends: 775 [2021-11-07 01:21:32,120 INFO L226 Difference]: Without dead ends: 668 [2021-11-07 01:21:32,121 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:21:32,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-11-07 01:21:32,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 561. [2021-11-07 01:21:32,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 559 states have (on average 1.7620751341681575) internal successors, (985), 560 states have internal predecessors, (985), 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 01:21:32,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 985 transitions. [2021-11-07 01:21:32,193 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 985 transitions. Word has length 45 [2021-11-07 01:21:32,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:32,196 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 985 transitions. [2021-11-07 01:21:32,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:32,197 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 985 transitions. [2021-11-07 01:21:32,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:21:32,200 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:32,201 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] [2021-11-07 01:21:32,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:32,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:32,420 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:32,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:32,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1348545787, now seen corresponding path program 1 times [2021-11-07 01:21:32,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:32,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045019366] [2021-11-07 01:21:32,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:32,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:32,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:32,425 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:32,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:21:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:33,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:21:33,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:33,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:33,366 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 01:21:33,366 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:33,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045019366] [2021-11-07 01:21:33,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045019366] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:33,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:33,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:21:33,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699230284] [2021-11-07 01:21:33,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:21:33,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:33,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:21:33,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:33,369 INFO L87 Difference]: Start difference. First operand 561 states and 985 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:33,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:33,471 INFO L93 Difference]: Finished difference Result 1307 states and 2303 transitions. [2021-11-07 01:21:33,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:21:33,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:21:33,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:33,480 INFO L225 Difference]: With dead ends: 1307 [2021-11-07 01:21:33,480 INFO L226 Difference]: Without dead ends: 830 [2021-11-07 01:21:33,481 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:33,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-11-07 01:21:33,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 723. [2021-11-07 01:21:33,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 721 states have (on average 1.7739251040221915) internal successors, (1279), 722 states have internal predecessors, (1279), 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 01:21:33,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1279 transitions. [2021-11-07 01:21:33,562 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1279 transitions. Word has length 57 [2021-11-07 01:21:33,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:33,563 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 1279 transitions. [2021-11-07 01:21:33,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:33,563 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1279 transitions. [2021-11-07 01:21:33,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:21:33,566 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:33,566 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:33,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:21:33,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:33,780 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:33,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:33,781 INFO L85 PathProgramCache]: Analyzing trace with hash 363027482, now seen corresponding path program 1 times [2021-11-07 01:21:33,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:33,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345955269] [2021-11-07 01:21:33,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:33,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:33,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:33,784 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:33,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:21:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:34,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:21:34,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:34,583 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 01:21:34,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:34,745 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:34,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345955269] [2021-11-07 01:21:34,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345955269] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:34,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:34,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:21:34,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859630503] [2021-11-07 01:21:34,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:21:34,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:34,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:21:34,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:34,748 INFO L87 Difference]: Start difference. First operand 723 states and 1279 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:34,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:34,896 INFO L93 Difference]: Finished difference Result 1825 states and 3250 transitions. [2021-11-07 01:21:34,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:21:34,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:21:34,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:34,909 INFO L225 Difference]: With dead ends: 1825 [2021-11-07 01:21:34,909 INFO L226 Difference]: Without dead ends: 1194 [2021-11-07 01:21:34,913 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:34,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-11-07 01:21:35,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1087. [2021-11-07 01:21:35,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1085 states have (on average 1.790783410138249) internal successors, (1943), 1086 states have internal predecessors, (1943), 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 01:21:35,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1943 transitions. [2021-11-07 01:21:35,053 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1943 transitions. Word has length 58 [2021-11-07 01:21:35,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:35,054 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 1943 transitions. [2021-11-07 01:21:35,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:35,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1943 transitions. [2021-11-07 01:21:35,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:21:35,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:35,058 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:35,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:35,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:35,277 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:35,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:35,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1024322647, now seen corresponding path program 1 times [2021-11-07 01:21:35,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:35,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602515876] [2021-11-07 01:21:35,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:35,278 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:35,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:35,280 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:35,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:21:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:35,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:21:35,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:36,033 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 01:21:36,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:36,209 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 01:21:36,210 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:36,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602515876] [2021-11-07 01:21:36,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602515876] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:36,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:36,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:21:36,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446771804] [2021-11-07 01:21:36,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:21:36,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:36,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:21:36,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:36,213 INFO L87 Difference]: Start difference. First operand 1087 states and 1943 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:36,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:36,401 INFO L93 Difference]: Finished difference Result 2897 states and 5211 transitions. [2021-11-07 01:21:36,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:21:36,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 01:21:36,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:36,418 INFO L225 Difference]: With dead ends: 2897 [2021-11-07 01:21:36,418 INFO L226 Difference]: Without dead ends: 1910 [2021-11-07 01:21:36,421 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:36,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2021-11-07 01:21:36,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1803. [2021-11-07 01:21:36,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1801 states have (on average 1.804553026096613) internal successors, (3250), 1802 states have internal predecessors, (3250), 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 01:21:36,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 3250 transitions. [2021-11-07 01:21:36,627 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 3250 transitions. Word has length 59 [2021-11-07 01:21:36,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:36,627 INFO L470 AbstractCegarLoop]: Abstraction has 1803 states and 3250 transitions. [2021-11-07 01:21:36,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:36,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 3250 transitions. [2021-11-07 01:21:36,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:21:36,632 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:36,632 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:36,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:36,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:36,850 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:36,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:36,851 INFO L85 PathProgramCache]: Analyzing trace with hash 543985961, now seen corresponding path program 1 times [2021-11-07 01:21:36,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:36,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853895003] [2021-11-07 01:21:36,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:36,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:36,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:36,853 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:36,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:21:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:37,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:21:37,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:37,624 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 01:21:37,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:37,853 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 01:21:37,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:37,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853895003] [2021-11-07 01:21:37,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853895003] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:37,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:37,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:21:37,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063368746] [2021-11-07 01:21:37,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:21:37,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:37,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:21:37,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:37,857 INFO L87 Difference]: Start difference. First operand 1803 states and 3250 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:38,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:38,173 INFO L93 Difference]: Finished difference Result 4781 states and 8651 transitions. [2021-11-07 01:21:38,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:21:38,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:21:38,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:38,200 INFO L225 Difference]: With dead ends: 4781 [2021-11-07 01:21:38,200 INFO L226 Difference]: Without dead ends: 3112 [2021-11-07 01:21:38,207 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:38,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2021-11-07 01:21:38,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 3005. [2021-11-07 01:21:38,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3005 states, 3003 states have (on average 1.8111888111888113) internal successors, (5439), 3004 states have internal predecessors, (5439), 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 01:21:38,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3005 states to 3005 states and 5439 transitions. [2021-11-07 01:21:38,521 INFO L78 Accepts]: Start accepts. Automaton has 3005 states and 5439 transitions. Word has length 60 [2021-11-07 01:21:38,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:38,522 INFO L470 AbstractCegarLoop]: Abstraction has 3005 states and 5439 transitions. [2021-11-07 01:21:38,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:38,523 INFO L276 IsEmpty]: Start isEmpty. Operand 3005 states and 5439 transitions. [2021-11-07 01:21:38,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:21:38,527 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:38,527 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:38,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:38,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:38,746 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:38,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:38,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1217208678, now seen corresponding path program 1 times [2021-11-07 01:21:38,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:38,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246386903] [2021-11-07 01:21:38,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:38,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:38,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:38,750 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:38,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:21:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:39,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:21:39,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:39,502 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 01:21:39,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:39,714 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 01:21:39,714 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:39,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246386903] [2021-11-07 01:21:39,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246386903] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:39,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:39,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:21:39,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502021429] [2021-11-07 01:21:39,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:21:39,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:39,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:21:39,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:39,717 INFO L87 Difference]: Start difference. First operand 3005 states and 5439 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:40,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:40,164 INFO L93 Difference]: Finished difference Result 8103 states and 14701 transitions. [2021-11-07 01:21:40,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:21:40,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:21:40,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:40,208 INFO L225 Difference]: With dead ends: 8103 [2021-11-07 01:21:40,208 INFO L226 Difference]: Without dead ends: 5266 [2021-11-07 01:21:40,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:40,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5266 states. [2021-11-07 01:21:40,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5266 to 5159. [2021-11-07 01:21:40,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5159 states, 5157 states have (on average 1.8134574364940856) internal successors, (9352), 5158 states have internal predecessors, (9352), 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 01:21:40,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5159 states to 5159 states and 9352 transitions. [2021-11-07 01:21:40,712 INFO L78 Accepts]: Start accepts. Automaton has 5159 states and 9352 transitions. Word has length 61 [2021-11-07 01:21:40,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:40,713 INFO L470 AbstractCegarLoop]: Abstraction has 5159 states and 9352 transitions. [2021-11-07 01:21:40,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:40,714 INFO L276 IsEmpty]: Start isEmpty. Operand 5159 states and 9352 transitions. [2021-11-07 01:21:40,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:21:40,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:40,719 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:40,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 01:21:40,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:40,938 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:40,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:40,939 INFO L85 PathProgramCache]: Analyzing trace with hash 2043618042, now seen corresponding path program 1 times [2021-11-07 01:21:40,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:40,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325112251] [2021-11-07 01:21:40,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:40,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:40,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:40,941 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:40,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:21:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:41,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:21:41,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:41,723 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 01:21:41,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:41,900 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 01:21:41,901 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:41,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325112251] [2021-11-07 01:21:41,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325112251] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:41,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:41,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:21:41,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956495954] [2021-11-07 01:21:41,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:21:41,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:41,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:21:41,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:41,904 INFO L87 Difference]: Start difference. First operand 5159 states and 9352 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:42,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:42,683 INFO L93 Difference]: Finished difference Result 15023 states and 27282 transitions. [2021-11-07 01:21:42,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:21:42,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:21:42,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:42,768 INFO L225 Difference]: With dead ends: 15023 [2021-11-07 01:21:42,768 INFO L226 Difference]: Without dead ends: 10036 [2021-11-07 01:21:42,777 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:42,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10036 states. [2021-11-07 01:21:43,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10036 to 9929. [2021-11-07 01:21:43,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9929 states, 9927 states have (on average 1.8141432456935631) internal successors, (18009), 9928 states have internal predecessors, (18009), 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 01:21:43,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9929 states to 9929 states and 18009 transitions. [2021-11-07 01:21:43,700 INFO L78 Accepts]: Start accepts. Automaton has 9929 states and 18009 transitions. Word has length 62 [2021-11-07 01:21:43,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:43,701 INFO L470 AbstractCegarLoop]: Abstraction has 9929 states and 18009 transitions. [2021-11-07 01:21:43,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:43,702 INFO L276 IsEmpty]: Start isEmpty. Operand 9929 states and 18009 transitions. [2021-11-07 01:21:43,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:21:43,712 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:43,713 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:43,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:43,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:43,928 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:43,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:43,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1250687690, now seen corresponding path program 1 times [2021-11-07 01:21:43,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:43,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508143010] [2021-11-07 01:21:43,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:43,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:43,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:43,932 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:43,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:21:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:44,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:21:44,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:44,803 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 01:21:44,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:45,046 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 01:21:45,046 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:45,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508143010] [2021-11-07 01:21:45,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508143010] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:45,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:45,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:21:45,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037473310] [2021-11-07 01:21:45,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:21:45,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:45,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:21:45,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:21:45,049 INFO L87 Difference]: Start difference. First operand 9929 states and 18009 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:48,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:48,397 INFO L93 Difference]: Finished difference Result 24418 states and 44306 transitions. [2021-11-07 01:21:48,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:21:48,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 01:21:48,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:48,451 INFO L225 Difference]: With dead ends: 24418 [2021-11-07 01:21:48,452 INFO L226 Difference]: Without dead ends: 14739 [2021-11-07 01:21:48,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:21:48,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14739 states. [2021-11-07 01:21:49,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14739 to 9896. [2021-11-07 01:21:49,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9896 states, 9894 states have (on average 1.8068526379624015) internal successors, (17877), 9895 states have internal predecessors, (17877), 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 01:21:49,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9896 states to 9896 states and 17877 transitions. [2021-11-07 01:21:49,642 INFO L78 Accepts]: Start accepts. Automaton has 9896 states and 17877 transitions. Word has length 63 [2021-11-07 01:21:49,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:49,642 INFO L470 AbstractCegarLoop]: Abstraction has 9896 states and 17877 transitions. [2021-11-07 01:21:49,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:49,643 INFO L276 IsEmpty]: Start isEmpty. Operand 9896 states and 17877 transitions. [2021-11-07 01:21:49,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:21:49,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:49,652 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:49,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:49,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:49,871 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:49,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:49,872 INFO L85 PathProgramCache]: Analyzing trace with hash -993080119, now seen corresponding path program 1 times [2021-11-07 01:21:49,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:49,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754912183] [2021-11-07 01:21:49,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:49,873 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:49,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:49,874 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:49,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:21:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:50,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:21:50,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:50,929 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 01:21:50,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:51,146 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 01:21:51,146 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:51,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754912183] [2021-11-07 01:21:51,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754912183] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:51,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:51,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:21:51,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089156532] [2021-11-07 01:21:51,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:21:51,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:51,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:21:51,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:51,148 INFO L87 Difference]: Start difference. First operand 9896 states and 17877 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:52,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:52,608 INFO L93 Difference]: Finished difference Result 28938 states and 52340 transitions. [2021-11-07 01:21:52,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:21:52,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 01:21:52,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:52,680 INFO L225 Difference]: With dead ends: 28938 [2021-11-07 01:21:52,681 INFO L226 Difference]: Without dead ends: 19221 [2021-11-07 01:21:52,701 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:52,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19221 states. [2021-11-07 01:21:54,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19221 to 19114. [2021-11-07 01:21:54,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19114 states, 19112 states have (on average 1.8060904143993302) internal successors, (34518), 19113 states have internal predecessors, (34518), 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 01:21:54,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19114 states to 19114 states and 34518 transitions. [2021-11-07 01:21:54,541 INFO L78 Accepts]: Start accepts. Automaton has 19114 states and 34518 transitions. Word has length 63 [2021-11-07 01:21:54,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:54,542 INFO L470 AbstractCegarLoop]: Abstraction has 19114 states and 34518 transitions. [2021-11-07 01:21:54,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:54,542 INFO L276 IsEmpty]: Start isEmpty. Operand 19114 states and 34518 transitions. [2021-11-07 01:21:54,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:21:54,550 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:54,550 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:54,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 01:21:54,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:54,771 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:54,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:54,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1847827396, now seen corresponding path program 1 times [2021-11-07 01:21:54,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:54,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924455128] [2021-11-07 01:21:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:54,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:54,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:54,774 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:54,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:21:55,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:55,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:21:55,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:55,675 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 01:21:55,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:55,889 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 01:21:55,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:55,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924455128] [2021-11-07 01:21:55,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924455128] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:55,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:55,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:21:55,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110782328] [2021-11-07 01:21:55,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:21:55,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:55,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:21:55,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:55,892 INFO L87 Difference]: Start difference. First operand 19114 states and 34518 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:57,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:57,776 INFO L93 Difference]: Finished difference Result 56778 states and 102577 transitions. [2021-11-07 01:21:57,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:21:57,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 01:21:57,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:57,899 INFO L225 Difference]: With dead ends: 56778 [2021-11-07 01:21:57,899 INFO L226 Difference]: Without dead ends: 37847 [2021-11-07 01:21:57,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:57,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37847 states. [2021-11-07 01:22:00,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37847 to 37740. [2021-11-07 01:22:00,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37740 states, 37738 states have (on average 1.8033547087815995) internal successors, (68055), 37739 states have internal predecessors, (68055), 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 01:22:00,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37740 states to 37740 states and 68055 transitions. [2021-11-07 01:22:00,706 INFO L78 Accepts]: Start accepts. Automaton has 37740 states and 68055 transitions. Word has length 64 [2021-11-07 01:22:00,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:00,706 INFO L470 AbstractCegarLoop]: Abstraction has 37740 states and 68055 transitions. [2021-11-07 01:22:00,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:00,707 INFO L276 IsEmpty]: Start isEmpty. Operand 37740 states and 68055 transitions. [2021-11-07 01:22:00,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:22:00,715 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:00,715 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:00,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:00,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:00,928 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:00,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:00,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1463664624, now seen corresponding path program 1 times [2021-11-07 01:22:00,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:00,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061336688] [2021-11-07 01:22:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:00,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:00,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:00,930 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:00,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:22:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:01,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:22:01,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:01,941 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 01:22:01,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:02,200 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 01:22:02,200 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:02,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061336688] [2021-11-07 01:22:02,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061336688] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:02,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:02,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:22:02,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446757291] [2021-11-07 01:22:02,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:22:02,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:02,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:22:02,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:22:02,203 INFO L87 Difference]: Start difference. First operand 37740 states and 68055 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:10,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:10,177 INFO L93 Difference]: Finished difference Result 146369 states and 263788 transitions. [2021-11-07 01:22:10,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:22:10,177 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:22:10,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:10,572 INFO L225 Difference]: With dead ends: 146369 [2021-11-07 01:22:10,573 INFO L226 Difference]: Without dead ends: 108878 [2021-11-07 01:22:10,902 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:22:11,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108878 states. [2021-11-07 01:22:14,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108878 to 37482. [2021-11-07 01:22:14,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37482 states, 37480 states have (on average 1.7882337246531483) internal successors, (67023), 37481 states have internal predecessors, (67023), 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 01:22:14,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37482 states to 37482 states and 67023 transitions. [2021-11-07 01:22:14,184 INFO L78 Accepts]: Start accepts. Automaton has 37482 states and 67023 transitions. Word has length 65 [2021-11-07 01:22:14,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:14,185 INFO L470 AbstractCegarLoop]: Abstraction has 37482 states and 67023 transitions. [2021-11-07 01:22:14,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:14,185 INFO L276 IsEmpty]: Start isEmpty. Operand 37482 states and 67023 transitions. [2021-11-07 01:22:14,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:22:14,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:14,193 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:14,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:14,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:14,408 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:14,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:14,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1775606994, now seen corresponding path program 1 times [2021-11-07 01:22:14,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:14,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2002383977] [2021-11-07 01:22:14,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:14,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:14,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:14,411 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:14,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:22:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:15,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:22:15,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:15,438 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 01:22:15,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:15,629 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 01:22:15,630 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:15,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2002383977] [2021-11-07 01:22:15,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2002383977] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:15,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:15,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:22:15,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906290417] [2021-11-07 01:22:15,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:22:15,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:15,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:22:15,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:15,633 INFO L87 Difference]: Start difference. First operand 37482 states and 67023 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:18,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:18,147 INFO L93 Difference]: Finished difference Result 74816 states and 133797 transitions. [2021-11-07 01:22:18,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:22:18,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:22:18,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:18,233 INFO L225 Difference]: With dead ends: 74816 [2021-11-07 01:22:18,233 INFO L226 Difference]: Without dead ends: 37589 [2021-11-07 01:22:18,268 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:18,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37589 states. [2021-11-07 01:22:20,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37589 to 37482. [2021-11-07 01:22:20,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37482 states, 37480 states have (on average 1.7848185699039487) internal successors, (66895), 37481 states have internal predecessors, (66895), 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 01:22:20,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37482 states to 37482 states and 66895 transitions. [2021-11-07 01:22:20,646 INFO L78 Accepts]: Start accepts. Automaton has 37482 states and 66895 transitions. Word has length 65 [2021-11-07 01:22:20,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:20,647 INFO L470 AbstractCegarLoop]: Abstraction has 37482 states and 66895 transitions. [2021-11-07 01:22:20,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:20,647 INFO L276 IsEmpty]: Start isEmpty. Operand 37482 states and 66895 transitions. [2021-11-07 01:22:20,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:22:20,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:20,653 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:20,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:20,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:20,872 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:20,873 INFO L85 PathProgramCache]: Analyzing trace with hash -515882085, now seen corresponding path program 1 times [2021-11-07 01:22:20,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:20,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187638394] [2021-11-07 01:22:20,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:20,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:20,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:20,876 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:20,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:22:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:21,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:22:21,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:22,033 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 01:22:22,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:22,248 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 01:22:22,249 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:22,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187638394] [2021-11-07 01:22:22,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187638394] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:22,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:22,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:22:22,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203331645] [2021-11-07 01:22:22,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:22:22,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:22,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:22:22,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:22:22,252 INFO L87 Difference]: Start difference. First operand 37482 states and 66895 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:26,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:26,118 INFO L93 Difference]: Finished difference Result 104042 states and 185327 transitions. [2021-11-07 01:22:26,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:22:26,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:22:26,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:26,278 INFO L225 Difference]: With dead ends: 104042 [2021-11-07 01:22:26,279 INFO L226 Difference]: Without dead ends: 66775 [2021-11-07 01:22:26,315 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:22:26,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66775 states. [2021-11-07 01:22:30,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66775 to 66668. [2021-11-07 01:22:30,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66668 states, 66666 states have (on average 1.7752977529775298) internal successors, (118352), 66667 states have internal predecessors, (118352), 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 01:22:31,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66668 states to 66668 states and 118352 transitions. [2021-11-07 01:22:31,119 INFO L78 Accepts]: Start accepts. Automaton has 66668 states and 118352 transitions. Word has length 65 [2021-11-07 01:22:31,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:31,120 INFO L470 AbstractCegarLoop]: Abstraction has 66668 states and 118352 transitions. [2021-11-07 01:22:31,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:31,120 INFO L276 IsEmpty]: Start isEmpty. Operand 66668 states and 118352 transitions. [2021-11-07 01:22:31,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:22:31,124 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:31,125 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] [2021-11-07 01:22:31,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:31,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:31,325 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:31,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:31,326 INFO L85 PathProgramCache]: Analyzing trace with hash 490721396, now seen corresponding path program 1 times [2021-11-07 01:22:31,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:31,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563300889] [2021-11-07 01:22:31,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:31,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:31,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:31,328 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:31,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:22:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:32,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:22:32,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:32,382 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 01:22:32,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:32,664 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 01:22:32,664 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:32,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563300889] [2021-11-07 01:22:32,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563300889] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:22:32,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [777536294] [2021-11-07 01:22:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:32,665 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:22:32,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:22:32,673 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:22:32,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0251a6d-25f9-4758-bb2c-18d4bacdea56/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:22:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:33,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:22:33,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:34,020 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 01:22:34,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:34,305 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 01:22:34,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [777536294] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:34,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:22:34,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:22:34,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120756204] [2021-11-07 01:22:34,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:22:34,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:34,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:22:34,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:22:34,308 INFO L87 Difference]: Start difference. First operand 66668 states and 118352 transitions. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 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)