./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec27_product23.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_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/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_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/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_9f06eb03-d5dc-406a-b742-010e84a5925c/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 b26e97b5c42973451de5f20f984873ade34b15aaa31cbbdc58b330ea8f51f185 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:30:01,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:30:01,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:30:01,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:30:01,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:30:01,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:30:01,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:30:01,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:30:01,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:30:01,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:30:01,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:30:01,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:30:01,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:30:01,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:30:01,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:30:01,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:30:01,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:30:01,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:30:01,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:30:01,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:30:01,657 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:30:01,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:30:01,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:30:01,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:30:01,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:30:01,679 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:30:01,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:30:01,683 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:30:01,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:30:01,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:30:01,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:30:01,688 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:30:01,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:30:01,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:30:01,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:30:01,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:30:01,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:30:01,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:30:01,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:30:01,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:30:01,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:30:01,699 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:30:01,752 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:30:01,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:30:01,754 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:30:01,755 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:30:01,755 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:30:01,755 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:30:01,755 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:30:01,756 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:30:01,762 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:30:01,763 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:30:01,764 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:30:01,765 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:30:01,765 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:30:01,765 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:30:01,766 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:30:01,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:30:01,767 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:30:01,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:30:01,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:30:01,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:30:01,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:30:01,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:30:01,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:30:01,769 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:30:01,769 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:30:01,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:30:01,770 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:30:01,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:30:01,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:30:01,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:30:01,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:30:01,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:30:01,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:30:01,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:30:01,775 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:30:01,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:30:01,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:30:01,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:30:01,776 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:30:01,776 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_9f06eb03-d5dc-406a-b742-010e84a5925c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b26e97b5c42973451de5f20f984873ade34b15aaa31cbbdc58b330ea8f51f185 [2021-11-07 01:30:02,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:30:02,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:30:02,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:30:02,165 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:30:02,166 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:30:02,167 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec27_product23.cil.c [2021-11-07 01:30:02,239 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/data/50c1f62bb/26f4237e0c0a49af97113064e5a079aa/FLAG1b4b6060d [2021-11-07 01:30:02,947 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:30:02,948 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/sv-benchmarks/c/product-lines/email_spec27_product23.cil.c [2021-11-07 01:30:02,988 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/data/50c1f62bb/26f4237e0c0a49af97113064e5a079aa/FLAG1b4b6060d [2021-11-07 01:30:03,163 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/data/50c1f62bb/26f4237e0c0a49af97113064e5a079aa [2021-11-07 01:30:03,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:30:03,168 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:30:03,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:30:03,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:30:03,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:30:03,175 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:03" (1/1) ... [2021-11-07 01:30:03,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6000a056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:03, skipping insertion in model container [2021-11-07 01:30:03,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:03" (1/1) ... [2021-11-07 01:30:03,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:30:03,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:30:04,090 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_9f06eb03-d5dc-406a-b742-010e84a5925c/sv-benchmarks/c/product-lines/email_spec27_product23.cil.c[46731,46744] [2021-11-07 01:30:04,159 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:30:04,182 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 01:30:04,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@660d0a2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:04, skipping insertion in model container [2021-11-07 01:30:04,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:30:04,184 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:30:04,188 INFO L168 Benchmark]: Toolchain (without parser) took 1017.89 ms. Allocated memory was 121.6 MB in the beginning and 169.9 MB in the end (delta: 48.2 MB). Free memory was 90.6 MB in the beginning and 130.3 MB in the end (delta: -39.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:30:04,190 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 121.6 MB. Free memory was 78.9 MB in the beginning and 78.8 MB in the end (delta: 53.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:30:04,192 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1015.09 ms. Allocated memory was 121.6 MB in the beginning and 169.9 MB in the end (delta: 48.2 MB). Free memory was 90.3 MB in the beginning and 130.3 MB in the end (delta: -40.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:30:04,196 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 121.6 MB. Free memory was 78.9 MB in the beginning and 78.8 MB in the end (delta: 53.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1015.09 ms. Allocated memory was 121.6 MB in the beginning and 169.9 MB in the end (delta: 48.2 MB). Free memory was 90.3 MB in the beginning and 130.3 MB in the end (delta: -40.0 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: 2315]: 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_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/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_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/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_9f06eb03-d5dc-406a-b742-010e84a5925c/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 b26e97b5c42973451de5f20f984873ade34b15aaa31cbbdc58b330ea8f51f185 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:30:06,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:30:06,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:30:06,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:30:06,834 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:30:06,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:30:06,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:30:06,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:30:06,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:30:06,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:30:06,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:30:06,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:30:06,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:30:06,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:30:06,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:30:06,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:30:06,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:30:06,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:30:06,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:30:06,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:30:06,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:30:06,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:30:06,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:30:06,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:30:06,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:30:06,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:30:06,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:30:06,911 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:30:06,912 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:30:06,913 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:30:06,913 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:30:06,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:30:06,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:30:06,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:30:06,920 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:30:06,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:30:06,921 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:30:06,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:30:06,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:30:06,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:30:06,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:30:06,926 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:30:06,980 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:30:06,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:30:06,982 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:30:06,982 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:30:06,983 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:30:06,983 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:30:06,983 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:30:06,983 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:30:06,984 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:30:06,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:30:06,986 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:30:06,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:30:06,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:30:06,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:30:06,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:30:06,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:30:06,988 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:30:06,988 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:30:06,988 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:30:06,988 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:30:06,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:30:06,989 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:30:06,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:30:06,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:30:06,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:30:06,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:30:06,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:30:06,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:30:06,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:30:06,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:30:06,991 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:30:06,991 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:30:06,991 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:30:06,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:30:06,992 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:30:06,992 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_9f06eb03-d5dc-406a-b742-010e84a5925c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b26e97b5c42973451de5f20f984873ade34b15aaa31cbbdc58b330ea8f51f185 [2021-11-07 01:30:07,483 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:30:07,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:30:07,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:30:07,512 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:30:07,513 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:30:07,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec27_product23.cil.c [2021-11-07 01:30:07,614 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/data/996b422c1/158c0a4cf44443668c2947fe11553808/FLAG6eec850fe [2021-11-07 01:30:08,325 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:30:08,326 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/sv-benchmarks/c/product-lines/email_spec27_product23.cil.c [2021-11-07 01:30:08,352 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/data/996b422c1/158c0a4cf44443668c2947fe11553808/FLAG6eec850fe [2021-11-07 01:30:08,503 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/data/996b422c1/158c0a4cf44443668c2947fe11553808 [2021-11-07 01:30:08,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:30:08,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:30:08,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:30:08,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:30:08,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:30:08,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:08" (1/1) ... [2021-11-07 01:30:08,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c0b01bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:08, skipping insertion in model container [2021-11-07 01:30:08,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:08" (1/1) ... [2021-11-07 01:30:08,530 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:30:08,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:30:09,259 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_9f06eb03-d5dc-406a-b742-010e84a5925c/sv-benchmarks/c/product-lines/email_spec27_product23.cil.c[46731,46744] [2021-11-07 01:30:09,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:30:09,373 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:30:09,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:30:09,472 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_9f06eb03-d5dc-406a-b742-010e84a5925c/sv-benchmarks/c/product-lines/email_spec27_product23.cil.c[46731,46744] [2021-11-07 01:30:09,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:30:09,512 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:30:09,564 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_9f06eb03-d5dc-406a-b742-010e84a5925c/sv-benchmarks/c/product-lines/email_spec27_product23.cil.c[46731,46744] [2021-11-07 01:30:09,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:30:09,619 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:30:09,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:09 WrapperNode [2021-11-07 01:30:09,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:30:09,621 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:30:09,621 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:30:09,621 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:30:09,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:09" (1/1) ... [2021-11-07 01:30:09,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:09" (1/1) ... [2021-11-07 01:30:09,805 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:30:09,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:30:09,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:30:09,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:30:09,816 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:09" (1/1) ... [2021-11-07 01:30:09,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:09" (1/1) ... [2021-11-07 01:30:09,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:09" (1/1) ... [2021-11-07 01:30:09,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:09" (1/1) ... [2021-11-07 01:30:09,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:09" (1/1) ... [2021-11-07 01:30:09,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:09" (1/1) ... [2021-11-07 01:30:09,935 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:09" (1/1) ... [2021-11-07 01:30:09,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:30:09,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:30:09,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:30:09,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:30:09,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:09" (1/1) ... [2021-11-07 01:30:09,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:30:09,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:30:09,988 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:30:10,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:30:10,037 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:30:10,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:30:10,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:30:10,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:30:10,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:30:15,532 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:30:15,532 INFO L299 CfgBuilder]: Removed 525 assume(true) statements. [2021-11-07 01:30:15,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:30:15 BoogieIcfgContainer [2021-11-07 01:30:15,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:30:15,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:30:15,538 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:30:15,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:30:15,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:30:08" (1/3) ... [2021-11-07 01:30:15,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea6c610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:30:15, skipping insertion in model container [2021-11-07 01:30:15,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:09" (2/3) ... [2021-11-07 01:30:15,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea6c610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:30:15, skipping insertion in model container [2021-11-07 01:30:15,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:30:15" (3/3) ... [2021-11-07 01:30:15,545 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec27_product23.cil.c [2021-11-07 01:30:15,550 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:30:15,550 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:30:15,605 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:30:15,611 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 01:30:15,612 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:30:15,654 INFO L276 IsEmpty]: Start isEmpty. Operand has 852 states, 845 states have (on average 1.7704142011834318) internal successors, (1496), 851 states have internal predecessors, (1496), 0 states have call successors, (0), 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 01:30:15,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:30:15,679 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:15,680 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:15,681 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:30:15,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:15,686 INFO L85 PathProgramCache]: Analyzing trace with hash 113080012, now seen corresponding path program 1 times [2021-11-07 01:30:15,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:15,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987278235] [2021-11-07 01:30:15,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:15,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:15,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:15,705 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:15,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:30:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:16,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:30:16,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:16,409 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 01:30:16,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:16,527 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 01:30:16,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:16,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987278235] [2021-11-07 01:30:16,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987278235] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:16,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:16,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:30:16,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832217848] [2021-11-07 01:30:16,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:30:16,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:16,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:30:16,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:30:16,553 INFO L87 Difference]: Start difference. First operand has 852 states, 845 states have (on average 1.7704142011834318) internal successors, (1496), 851 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 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 01:30:16,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:16,625 INFO L93 Difference]: Finished difference Result 1419 states and 2469 transitions. [2021-11-07 01:30:16,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:30:16,627 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 01:30:16,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:16,648 INFO L225 Difference]: With dead ends: 1419 [2021-11-07 01:30:16,648 INFO L226 Difference]: Without dead ends: 822 [2021-11-07 01:30:16,654 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 100 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 01:30:16,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-11-07 01:30:16,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 822. [2021-11-07 01:30:16,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 816 states have (on average 1.7610294117647058) internal successors, (1437), 821 states have internal predecessors, (1437), 0 states have call successors, (0), 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 01:30:16,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1437 transitions. [2021-11-07 01:30:16,763 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1437 transitions. Word has length 51 [2021-11-07 01:30:16,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:16,763 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 1437 transitions. [2021-11-07 01:30:16,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 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 01:30:16,764 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1437 transitions. [2021-11-07 01:30:16,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:30:16,769 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:16,769 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] [2021-11-07 01:30:16,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:16,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:16,970 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:30:16,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:16,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1866954604, now seen corresponding path program 1 times [2021-11-07 01:30:16,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:16,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993386880] [2021-11-07 01:30:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:16,973 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:16,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:16,975 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:16,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:30:17,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:17,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:30:17,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:17,524 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 01:30:17,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:17,682 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 01:30:17,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:17,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993386880] [2021-11-07 01:30:17,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993386880] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:17,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:17,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:30:17,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855046652] [2021-11-07 01:30:17,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:30:17,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:17,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:30:17,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:30:17,687 INFO L87 Difference]: Start difference. First operand 822 states and 1437 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 01:30:17,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:17,815 INFO L93 Difference]: Finished difference Result 2436 states and 4263 transitions. [2021-11-07 01:30:17,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:30:17,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 52 [2021-11-07 01:30:17,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:17,830 INFO L225 Difference]: With dead ends: 2436 [2021-11-07 01:30:17,830 INFO L226 Difference]: Without dead ends: 1629 [2021-11-07 01:30:17,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 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 01:30:17,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2021-11-07 01:30:17,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 821. [2021-11-07 01:30:17,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 815 states have (on average 1.7570552147239265) internal successors, (1432), 820 states have internal predecessors, (1432), 0 states have call successors, (0), 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 01:30:17,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1432 transitions. [2021-11-07 01:30:17,900 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1432 transitions. Word has length 52 [2021-11-07 01:30:17,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:17,901 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1432 transitions. [2021-11-07 01:30:17,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 01:30:17,902 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1432 transitions. [2021-11-07 01:30:17,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:30:17,914 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:17,915 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:17,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:18,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:18,135 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:30:18,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:18,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1791663250, now seen corresponding path program 1 times [2021-11-07 01:30:18,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:18,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614797573] [2021-11-07 01:30:18,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:18,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:18,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:18,140 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:18,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:30:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:18,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:30:18,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:18,739 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 01:30:18,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:18,906 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 01:30:18,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:18,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614797573] [2021-11-07 01:30:18,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614797573] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:18,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:18,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:30:18,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960347533] [2021-11-07 01:30:18,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:30:18,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:18,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:30:18,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:30:18,909 INFO L87 Difference]: Start difference. First operand 821 states and 1432 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 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 01:30:19,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:19,335 INFO L93 Difference]: Finished difference Result 3201 states and 5590 transitions. [2021-11-07 01:30:19,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:30:19,336 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 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 54 [2021-11-07 01:30:19,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:19,355 INFO L225 Difference]: With dead ends: 3201 [2021-11-07 01:30:19,355 INFO L226 Difference]: Without dead ends: 2398 [2021-11-07 01:30:19,358 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 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 01:30:19,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2021-11-07 01:30:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 820. [2021-11-07 01:30:19,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 814 states have (on average 1.7542997542997543) internal successors, (1428), 819 states have internal predecessors, (1428), 0 states have call successors, (0), 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 01:30:19,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1428 transitions. [2021-11-07 01:30:19,449 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1428 transitions. Word has length 54 [2021-11-07 01:30:19,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:19,450 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 1428 transitions. [2021-11-07 01:30:19,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 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 01:30:19,450 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1428 transitions. [2021-11-07 01:30:19,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:30:19,455 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:19,455 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:19,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:19,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:19,675 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:30:19,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:19,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1333026053, now seen corresponding path program 1 times [2021-11-07 01:30:19,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:19,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659489126] [2021-11-07 01:30:19,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:19,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:19,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:19,681 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:19,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:30:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:20,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:30:20,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:20,337 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 01:30:20,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:20,513 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 01:30:20,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:20,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659489126] [2021-11-07 01:30:20,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1659489126] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:20,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:20,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:30:20,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929906830] [2021-11-07 01:30:20,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:30:20,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:20,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:30:20,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:30:20,519 INFO L87 Difference]: Start difference. First operand 820 states and 1428 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 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 01:30:20,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:20,634 INFO L93 Difference]: Finished difference Result 1637 states and 2853 transitions. [2021-11-07 01:30:20,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:30:20,635 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 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 55 [2021-11-07 01:30:20,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:20,642 INFO L225 Difference]: With dead ends: 1637 [2021-11-07 01:30:20,642 INFO L226 Difference]: Without dead ends: 825 [2021-11-07 01:30:20,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 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 01:30:20,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-11-07 01:30:20,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 820. [2021-11-07 01:30:20,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 814 states have (on average 1.7506142506142506) internal successors, (1425), 819 states have internal predecessors, (1425), 0 states have call successors, (0), 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 01:30:20,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1425 transitions. [2021-11-07 01:30:20,706 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1425 transitions. Word has length 55 [2021-11-07 01:30:20,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:20,709 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 1425 transitions. [2021-11-07 01:30:20,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 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 01:30:20,709 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1425 transitions. [2021-11-07 01:30:20,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:30:20,712 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:20,713 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] [2021-11-07 01:30:20,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:20,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:20,930 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:30:20,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:20,931 INFO L85 PathProgramCache]: Analyzing trace with hash -426827898, now seen corresponding path program 1 times [2021-11-07 01:30:20,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:20,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849176193] [2021-11-07 01:30:20,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:20,932 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:20,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:20,934 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:20,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:30:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:21,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:30:21,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:21,535 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 01:30:21,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:21,727 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 01:30:21,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:21,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849176193] [2021-11-07 01:30:21,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [849176193] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:21,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:21,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:30:21,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233556209] [2021-11-07 01:30:21,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:30:21,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:21,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:30:21,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:30:21,742 INFO L87 Difference]: Start difference. First operand 820 states and 1425 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 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 01:30:22,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:22,078 INFO L93 Difference]: Finished difference Result 3188 states and 5566 transitions. [2021-11-07 01:30:22,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:30:22,079 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 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 56 [2021-11-07 01:30:22,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:22,094 INFO L225 Difference]: With dead ends: 3188 [2021-11-07 01:30:22,095 INFO L226 Difference]: Without dead ends: 2394 [2021-11-07 01:30:22,096 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 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 01:30:22,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2021-11-07 01:30:22,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 820. [2021-11-07 01:30:22,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 814 states have (on average 1.746928746928747) internal successors, (1422), 819 states have internal predecessors, (1422), 0 states have call successors, (0), 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 01:30:22,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1422 transitions. [2021-11-07 01:30:22,169 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1422 transitions. Word has length 56 [2021-11-07 01:30:22,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:22,170 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 1422 transitions. [2021-11-07 01:30:22,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 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 01:30:22,170 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1422 transitions. [2021-11-07 01:30:22,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:30:22,172 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:22,172 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 01:30:22,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:22,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:22,391 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:30:22,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:22,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1407440725, now seen corresponding path program 1 times [2021-11-07 01:30:22,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:22,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974010810] [2021-11-07 01:30:22,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:22,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:22,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:22,394 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:22,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:30:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:22,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:22,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:23,009 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 01:30:23,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:23,140 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 01:30:23,140 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:23,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974010810] [2021-11-07 01:30:23,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974010810] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:23,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:23,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:30:23,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815891323] [2021-11-07 01:30:23,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:30:23,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:23,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:30:23,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:30:23,145 INFO L87 Difference]: Start difference. First operand 820 states and 1422 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 01:30:23,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:23,304 INFO L93 Difference]: Finished difference Result 2151 states and 3731 transitions. [2021-11-07 01:30:23,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:30:23,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 58 [2021-11-07 01:30:23,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:23,315 INFO L225 Difference]: With dead ends: 2151 [2021-11-07 01:30:23,315 INFO L226 Difference]: Without dead ends: 1614 [2021-11-07 01:30:23,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 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 01:30:23,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-11-07 01:30:23,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1077. [2021-11-07 01:30:23,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1071 states have (on average 1.76937441643324) internal successors, (1895), 1076 states have internal predecessors, (1895), 0 states have call successors, (0), 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 01:30:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1895 transitions. [2021-11-07 01:30:23,413 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1895 transitions. Word has length 58 [2021-11-07 01:30:23,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:23,413 INFO L470 AbstractCegarLoop]: Abstraction has 1077 states and 1895 transitions. [2021-11-07 01:30:23,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 01:30:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1895 transitions. [2021-11-07 01:30:23,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:30:23,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:23,416 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:23,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:23,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:23,631 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:30:23,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:23,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1761713734, now seen corresponding path program 1 times [2021-11-07 01:30:23,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:23,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434329622] [2021-11-07 01:30:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:23,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:23,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:23,633 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:23,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:30:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:24,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:24,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:24,243 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 01:30:24,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:24,409 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 01:30:24,409 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:24,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434329622] [2021-11-07 01:30:24,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434329622] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:24,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:24,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:30:24,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499256280] [2021-11-07 01:30:24,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:24,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:24,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:24,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:24,411 INFO L87 Difference]: Start difference. First operand 1077 states and 1895 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:24,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:24,547 INFO L93 Difference]: Finished difference Result 2812 states and 4951 transitions. [2021-11-07 01:30:24,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:24,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:30:24,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:24,559 INFO L225 Difference]: With dead ends: 2812 [2021-11-07 01:30:24,559 INFO L226 Difference]: Without dead ends: 1819 [2021-11-07 01:30:24,561 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1819 states. [2021-11-07 01:30:24,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1819 to 1282. [2021-11-07 01:30:24,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1276 states have (on average 1.7797805642633229) internal successors, (2271), 1281 states have internal predecessors, (2271), 0 states have call successors, (0), 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 01:30:24,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 2271 transitions. [2021-11-07 01:30:24,662 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 2271 transitions. Word has length 70 [2021-11-07 01:30:24,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:24,663 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 2271 transitions. [2021-11-07 01:30:24,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:24,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 2271 transitions. [2021-11-07 01:30:24,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:30:24,665 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:24,666 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:24,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:24,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:24,879 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:30:24,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:24,879 INFO L85 PathProgramCache]: Analyzing trace with hash -19137285, now seen corresponding path program 1 times [2021-11-07 01:30:24,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:24,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434966514] [2021-11-07 01:30:24,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:24,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:24,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:24,881 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:24,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:30:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:25,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:25,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:25,524 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 01:30:25,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:25,709 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 01:30:25,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:25,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434966514] [2021-11-07 01:30:25,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434966514] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:25,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:25,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:30:25,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272478681] [2021-11-07 01:30:25,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:25,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:25,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:25,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:25,711 INFO L87 Difference]: Start difference. First operand 1282 states and 2271 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:25,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:25,914 INFO L93 Difference]: Finished difference Result 3459 states and 6144 transitions. [2021-11-07 01:30:25,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:25,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:30:25,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:25,932 INFO L225 Difference]: With dead ends: 3459 [2021-11-07 01:30:25,932 INFO L226 Difference]: Without dead ends: 2269 [2021-11-07 01:30:25,938 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:25,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-11-07 01:30:26,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 1732. [2021-11-07 01:30:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1726 states have (on average 1.795480880648899) internal successors, (3099), 1731 states have internal predecessors, (3099), 0 states have call successors, (0), 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 01:30:26,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 3099 transitions. [2021-11-07 01:30:26,146 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 3099 transitions. Word has length 71 [2021-11-07 01:30:26,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:26,146 INFO L470 AbstractCegarLoop]: Abstraction has 1732 states and 3099 transitions. [2021-11-07 01:30:26,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:26,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 3099 transitions. [2021-11-07 01:30:26,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:30:26,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:26,151 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:26,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:26,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:26,371 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:30:26,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:26,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1772993076, now seen corresponding path program 1 times [2021-11-07 01:30:26,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:26,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691331471] [2021-11-07 01:30:26,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:26,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:26,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:26,373 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:26,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:30:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:26,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:26,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:27,161 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 01:30:27,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:27,350 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 01:30:27,350 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:27,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691331471] [2021-11-07 01:30:27,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691331471] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:27,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:27,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:30:27,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157632912] [2021-11-07 01:30:27,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:27,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:27,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:27,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:27,355 INFO L87 Difference]: Start difference. First operand 1732 states and 3099 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:27,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:27,626 INFO L93 Difference]: Finished difference Result 4789 states and 8597 transitions. [2021-11-07 01:30:27,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:27,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:30:27,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:27,651 INFO L225 Difference]: With dead ends: 4789 [2021-11-07 01:30:27,651 INFO L226 Difference]: Without dead ends: 3157 [2021-11-07 01:30:27,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:27,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2021-11-07 01:30:27,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 2620. [2021-11-07 01:30:27,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2620 states, 2614 states have (on average 1.811017597551645) internal successors, (4734), 2619 states have internal predecessors, (4734), 0 states have call successors, (0), 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 01:30:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 4734 transitions. [2021-11-07 01:30:27,947 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 4734 transitions. Word has length 72 [2021-11-07 01:30:27,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:27,947 INFO L470 AbstractCegarLoop]: Abstraction has 2620 states and 4734 transitions. [2021-11-07 01:30:27,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:27,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 4734 transitions. [2021-11-07 01:30:27,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:30:27,959 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:27,959 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:27,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:28,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:28,175 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:30:28,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:28,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1452296116, now seen corresponding path program 1 times [2021-11-07 01:30:28,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:28,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862324321] [2021-11-07 01:30:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:28,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:28,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:28,179 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:28,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:30:28,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:28,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:28,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:29,007 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 01:30:29,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:29,195 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 01:30:29,195 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:29,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862324321] [2021-11-07 01:30:29,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862324321] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:29,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:29,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:30:29,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850524991] [2021-11-07 01:30:29,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:29,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:29,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:29,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:29,197 INFO L87 Difference]: Start difference. First operand 2620 states and 4734 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:29,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:29,510 INFO L93 Difference]: Finished difference Result 7189 states and 13021 transitions. [2021-11-07 01:30:29,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:29,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:30:29,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:29,541 INFO L225 Difference]: With dead ends: 7189 [2021-11-07 01:30:29,542 INFO L226 Difference]: Without dead ends: 4703 [2021-11-07 01:30:29,546 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:29,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4703 states. [2021-11-07 01:30:29,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4703 to 4166. [2021-11-07 01:30:29,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4166 states, 4160 states have (on average 1.821875) internal successors, (7579), 4165 states have internal predecessors, (7579), 0 states have call successors, (0), 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 01:30:29,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4166 states to 4166 states and 7579 transitions. [2021-11-07 01:30:29,878 INFO L78 Accepts]: Start accepts. Automaton has 4166 states and 7579 transitions. Word has length 73 [2021-11-07 01:30:29,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:29,878 INFO L470 AbstractCegarLoop]: Abstraction has 4166 states and 7579 transitions. [2021-11-07 01:30:29,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:29,879 INFO L276 IsEmpty]: Start isEmpty. Operand 4166 states and 7579 transitions. [2021-11-07 01:30:29,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:30:29,886 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:29,886 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:29,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:30,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:30,102 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:30:30,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:30,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1800107397, now seen corresponding path program 1 times [2021-11-07 01:30:30,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:30,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179981142] [2021-11-07 01:30:30,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:30,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:30,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:30,105 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:30,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:30:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:30,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:30,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:30,869 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 01:30:30,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:31,105 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 01:30:31,105 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:31,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179981142] [2021-11-07 01:30:31,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179981142] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:31,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:31,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:30:31,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872035282] [2021-11-07 01:30:31,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:31,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:31,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:31,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:31,108 INFO L87 Difference]: Start difference. First operand 4166 states and 7579 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:31,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:31,590 INFO L93 Difference]: Finished difference Result 11543 states and 21039 transitions. [2021-11-07 01:30:31,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:31,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:30:31,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:31,635 INFO L225 Difference]: With dead ends: 11543 [2021-11-07 01:30:31,635 INFO L226 Difference]: Without dead ends: 7545 [2021-11-07 01:30:31,643 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:31,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7545 states. [2021-11-07 01:30:32,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7545 to 7008. [2021-11-07 01:30:32,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7008 states, 7002 states have (on average 1.8286203941730934) internal successors, (12804), 7007 states have internal predecessors, (12804), 0 states have call successors, (0), 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 01:30:32,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7008 states to 7008 states and 12804 transitions. [2021-11-07 01:30:32,151 INFO L78 Accepts]: Start accepts. Automaton has 7008 states and 12804 transitions. Word has length 74 [2021-11-07 01:30:32,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:32,153 INFO L470 AbstractCegarLoop]: Abstraction has 7008 states and 12804 transitions. [2021-11-07 01:30:32,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:32,154 INFO L276 IsEmpty]: Start isEmpty. Operand 7008 states and 12804 transitions. [2021-11-07 01:30:32,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:30:32,163 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:32,163 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:32,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:32,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:32,379 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:30:32,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:32,379 INFO L85 PathProgramCache]: Analyzing trace with hash 613573147, now seen corresponding path program 1 times [2021-11-07 01:30:32,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:32,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183083206] [2021-11-07 01:30:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:32,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:32,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:32,381 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:32,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:30:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:32,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:32,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:33,112 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 01:30:33,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:33,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:33,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183083206] [2021-11-07 01:30:33,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183083206] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:33,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:33,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:30:33,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720304012] [2021-11-07 01:30:33,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:33,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:33,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:33,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:33,281 INFO L87 Difference]: Start difference. First operand 7008 states and 12804 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:33,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:33,972 INFO L93 Difference]: Finished difference Result 20527 states and 37556 transitions. [2021-11-07 01:30:33,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:33,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:30:33,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:34,013 INFO L225 Difference]: With dead ends: 20527 [2021-11-07 01:30:34,014 INFO L226 Difference]: Without dead ends: 13691 [2021-11-07 01:30:34,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:34,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13691 states. [2021-11-07 01:30:34,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13691 to 13154. [2021-11-07 01:30:34,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13154 states, 13148 states have (on average 1.8318375418314572) internal successors, (24085), 13153 states have internal predecessors, (24085), 0 states have call successors, (0), 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 01:30:34,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13154 states to 13154 states and 24085 transitions. [2021-11-07 01:30:34,702 INFO L78 Accepts]: Start accepts. Automaton has 13154 states and 24085 transitions. Word has length 75 [2021-11-07 01:30:34,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:34,702 INFO L470 AbstractCegarLoop]: Abstraction has 13154 states and 24085 transitions. [2021-11-07 01:30:34,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:34,703 INFO L276 IsEmpty]: Start isEmpty. Operand 13154 states and 24085 transitions. [2021-11-07 01:30:34,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:30:34,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:34,766 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:34,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:34,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:34,974 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:30:34,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:34,975 INFO L85 PathProgramCache]: Analyzing trace with hash -87962101, now seen corresponding path program 1 times [2021-11-07 01:30:34,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:34,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155117726] [2021-11-07 01:30:34,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:34,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:34,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:34,976 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:34,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:30:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:35,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:30:35,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:35,779 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 01:30:35,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:36,006 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 01:30:36,006 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:36,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155117726] [2021-11-07 01:30:36,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155117726] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:36,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:36,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:30:36,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952326710] [2021-11-07 01:30:36,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:30:36,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:36,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:30:36,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:30:36,009 INFO L87 Difference]: Start difference. First operand 13154 states and 24085 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 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 01:30:39,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:39,221 INFO L93 Difference]: Finished difference Result 32631 states and 59746 transitions. [2021-11-07 01:30:39,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:30:39,222 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:30:39,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:39,277 INFO L225 Difference]: With dead ends: 32631 [2021-11-07 01:30:39,277 INFO L226 Difference]: Without dead ends: 19770 [2021-11-07 01:30:39,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 146 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 01:30:39,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19770 states. [2021-11-07 01:30:39,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19770 to 13121. [2021-11-07 01:30:39,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13121 states, 13115 states have (on average 1.8263820053374) internal successors, (23953), 13120 states have internal predecessors, (23953), 0 states have call successors, (0), 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 01:30:39,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13121 states to 13121 states and 23953 transitions. [2021-11-07 01:30:39,983 INFO L78 Accepts]: Start accepts. Automaton has 13121 states and 23953 transitions. Word has length 76 [2021-11-07 01:30:39,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:39,983 INFO L470 AbstractCegarLoop]: Abstraction has 13121 states and 23953 transitions. [2021-11-07 01:30:39,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 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 01:30:39,984 INFO L276 IsEmpty]: Start isEmpty. Operand 13121 states and 23953 transitions. [2021-11-07 01:30:39,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:30:39,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:39,995 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:40,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:40,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:40,210 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:30:40,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:40,211 INFO L85 PathProgramCache]: Analyzing trace with hash -60596052, now seen corresponding path program 1 times [2021-11-07 01:30:40,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:40,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034027719] [2021-11-07 01:30:40,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:40,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:40,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:40,212 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:40,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:30:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:40,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:40,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:40,984 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 01:30:40,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:41,161 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 01:30:41,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:41,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034027719] [2021-11-07 01:30:41,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034027719] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:41,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:41,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:30:41,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464850669] [2021-11-07 01:30:41,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:41,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:41,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:41,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:41,163 INFO L87 Difference]: Start difference. First operand 13121 states and 23953 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:42,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:42,351 INFO L93 Difference]: Finished difference Result 38570 states and 70486 transitions. [2021-11-07 01:30:42,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:42,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:30:42,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:42,437 INFO L225 Difference]: With dead ends: 38570 [2021-11-07 01:30:42,437 INFO L226 Difference]: Without dead ends: 25628 [2021-11-07 01:30:42,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:42,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25628 states. [2021-11-07 01:30:43,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25628 to 25091. [2021-11-07 01:30:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25091 states, 25085 states have (on average 1.8274666135140523) internal successors, (45842), 25090 states have internal predecessors, (45842), 0 states have call successors, (0), 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 01:30:43,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25091 states to 25091 states and 45842 transitions. [2021-11-07 01:30:43,777 INFO L78 Accepts]: Start accepts. Automaton has 25091 states and 45842 transitions. Word has length 76 [2021-11-07 01:30:43,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:43,777 INFO L470 AbstractCegarLoop]: Abstraction has 25091 states and 45842 transitions. [2021-11-07 01:30:43,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:43,778 INFO L276 IsEmpty]: Start isEmpty. Operand 25091 states and 45842 transitions. [2021-11-07 01:30:43,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:30:43,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:43,794 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:43,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:44,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:44,018 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:30:44,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:44,019 INFO L85 PathProgramCache]: Analyzing trace with hash -721109991, now seen corresponding path program 1 times [2021-11-07 01:30:44,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:44,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1836921552] [2021-11-07 01:30:44,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:44,019 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:44,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:44,020 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:44,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:30:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:44,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:44,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:45,007 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 01:30:45,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:45,222 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:45,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1836921552] [2021-11-07 01:30:45,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1836921552] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:45,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:45,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:30:45,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742741230] [2021-11-07 01:30:45,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:45,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:45,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:45,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:45,225 INFO L87 Difference]: Start difference. First operand 25091 states and 45842 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:47,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:47,303 INFO L93 Difference]: Finished difference Result 69119 states and 125889 transitions. [2021-11-07 01:30:47,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:47,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:30:47,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:47,439 INFO L225 Difference]: With dead ends: 69119 [2021-11-07 01:30:47,439 INFO L226 Difference]: Without dead ends: 44254 [2021-11-07 01:30:47,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:47,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44254 states. [2021-11-07 01:30:50,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44254 to 43717. [2021-11-07 01:30:50,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43717 states, 43711 states have (on average 1.8159959735535678) internal successors, (79379), 43716 states have internal predecessors, (79379), 0 states have call successors, (0), 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 01:30:50,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43717 states to 43717 states and 79379 transitions. [2021-11-07 01:30:50,793 INFO L78 Accepts]: Start accepts. Automaton has 43717 states and 79379 transitions. Word has length 77 [2021-11-07 01:30:50,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:50,793 INFO L470 AbstractCegarLoop]: Abstraction has 43717 states and 79379 transitions. [2021-11-07 01:30:50,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:50,794 INFO L276 IsEmpty]: Start isEmpty. Operand 43717 states and 79379 transitions. [2021-11-07 01:30:50,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:30:50,810 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:50,811 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:50,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:51,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:51,031 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:30:51,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:51,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1850264197, now seen corresponding path program 1 times [2021-11-07 01:30:51,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:51,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702120051] [2021-11-07 01:30:51,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:51,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:51,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:51,033 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:51,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:30:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:51,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:30:51,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:52,117 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 01:30:52,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:52,412 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 01:30:52,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:52,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702120051] [2021-11-07 01:30:52,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702120051] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:52,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:52,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:30:52,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809754968] [2021-11-07 01:30:52,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:30:52,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:52,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:30:52,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:30:52,413 INFO L87 Difference]: Start difference. First operand 43717 states and 79379 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 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 01:30:59,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:59,741 INFO L93 Difference]: Finished difference Result 170148 states and 308838 transitions. [2021-11-07 01:30:59,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:30:59,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 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 78 [2021-11-07 01:30:59,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:59,983 INFO L225 Difference]: With dead ends: 170148 [2021-11-07 01:30:59,983 INFO L226 Difference]: Without dead ends: 126723 [2021-11-07 01:31:00,027 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:31:00,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126723 states. [2021-11-07 01:31:03,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126723 to 43459. [2021-11-07 01:31:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43459 states, 43453 states have (on average 1.8030285595931237) internal successors, (78347), 43458 states have internal predecessors, (78347), 0 states have call successors, (0), 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 01:31:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43459 states to 43459 states and 78347 transitions. [2021-11-07 01:31:03,731 INFO L78 Accepts]: Start accepts. Automaton has 43459 states and 78347 transitions. Word has length 78 [2021-11-07 01:31:03,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:03,732 INFO L470 AbstractCegarLoop]: Abstraction has 43459 states and 78347 transitions. [2021-11-07 01:31:03,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 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 01:31:03,732 INFO L276 IsEmpty]: Start isEmpty. Operand 43459 states and 78347 transitions. [2021-11-07 01:31:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:31:03,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:03,749 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:03,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:03,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:03,969 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:31:03,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:03,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1416570919, now seen corresponding path program 1 times [2021-11-07 01:31:03,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:03,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322985814] [2021-11-07 01:31:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:03,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:03,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:03,971 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:03,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:31:04,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:04,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:31:04,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:04,901 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 01:31:04,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:05,090 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 01:31:05,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:05,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322985814] [2021-11-07 01:31:05,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322985814] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:05,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:05,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:31:05,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331078227] [2021-11-07 01:31:05,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:31:05,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:05,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:31:05,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:31:05,094 INFO L87 Difference]: Start difference. First operand 43459 states and 78347 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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 01:31:07,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:07,056 INFO L93 Difference]: Finished difference Result 87157 states and 157109 transitions. [2021-11-07 01:31:07,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:31:07,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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 78 [2021-11-07 01:31:07,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:07,116 INFO L225 Difference]: With dead ends: 87157 [2021-11-07 01:31:07,116 INFO L226 Difference]: Without dead ends: 43996 [2021-11-07 01:31:07,139 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 152 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 01:31:07,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43996 states. [2021-11-07 01:31:09,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43996 to 43459. [2021-11-07 01:31:09,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43459 states, 43453 states have (on average 1.8000828481347664) internal successors, (78219), 43458 states have internal predecessors, (78219), 0 states have call successors, (0), 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 01:31:09,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43459 states to 43459 states and 78219 transitions. [2021-11-07 01:31:09,405 INFO L78 Accepts]: Start accepts. Automaton has 43459 states and 78219 transitions. Word has length 78 [2021-11-07 01:31:09,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:09,406 INFO L470 AbstractCegarLoop]: Abstraction has 43459 states and 78219 transitions. [2021-11-07 01:31:09,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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 01:31:09,406 INFO L276 IsEmpty]: Start isEmpty. Operand 43459 states and 78219 transitions. [2021-11-07 01:31:09,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:31:09,414 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:09,414 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:09,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:09,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:09,631 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:31:09,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:09,631 INFO L85 PathProgramCache]: Analyzing trace with hash -495907046, now seen corresponding path program 1 times [2021-11-07 01:31:09,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:09,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158831583] [2021-11-07 01:31:09,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:09,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:09,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:09,633 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:09,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:31:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:10,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:31:10,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:10,588 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 01:31:10,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:10,781 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 01:31:10,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:10,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158831583] [2021-11-07 01:31:10,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158831583] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:10,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:10,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:31:10,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377481726] [2021-11-07 01:31:10,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:31:10,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:10,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:31:10,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:31:10,783 INFO L87 Difference]: Start difference. First operand 43459 states and 78219 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 01:31:14,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:14,129 INFO L93 Difference]: Finished difference Result 121887 states and 219135 transitions. [2021-11-07 01:31:14,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:31:14,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-11-07 01:31:14,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:14,250 INFO L225 Difference]: With dead ends: 121887 [2021-11-07 01:31:14,250 INFO L226 Difference]: Without dead ends: 78686 [2021-11-07 01:31:14,276 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 153 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 01:31:14,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78686 states. [2021-11-07 01:31:18,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78686 to 78149. [2021-11-07 01:31:18,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78149 states, 78143 states have (on average 1.7937883111731057) internal successors, (140172), 78148 states have internal predecessors, (140172), 0 states have call successors, (0), 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 01:31:18,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78149 states to 78149 states and 140172 transitions. [2021-11-07 01:31:18,851 INFO L78 Accepts]: Start accepts. Automaton has 78149 states and 140172 transitions. Word has length 78 [2021-11-07 01:31:18,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:18,851 INFO L470 AbstractCegarLoop]: Abstraction has 78149 states and 140172 transitions. [2021-11-07 01:31:18,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 01:31:18,852 INFO L276 IsEmpty]: Start isEmpty. Operand 78149 states and 140172 transitions. [2021-11-07 01:31:18,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:31:18,860 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:18,860 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:18,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:19,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:19,061 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:31:19,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:19,061 INFO L85 PathProgramCache]: Analyzing trace with hash -386401119, now seen corresponding path program 1 times [2021-11-07 01:31:19,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:19,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326632944] [2021-11-07 01:31:19,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:19,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:19,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:19,064 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:19,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:31:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:19,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:31:19,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:20,018 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 01:31:20,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:20,263 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 01:31:20,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:20,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326632944] [2021-11-07 01:31:20,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326632944] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:31:20,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [848676772] [2021-11-07 01:31:20,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:20,264 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:31:20,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:31:20,272 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:31:20,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f06eb03-d5dc-406a-b742-010e84a5925c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:31:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:21,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:31:21,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:21,554 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 01:31:21,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:21,832 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 01:31:21,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [848676772] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:21,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:31:21,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:31:21,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858435202] [2021-11-07 01:31:21,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:31:21,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:21,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:31:21,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:31:21,835 INFO L87 Difference]: Start difference. First operand 78149 states and 140172 transitions. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)