./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec4_product31.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_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/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_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/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_7d6df3d0-0b64-4d34-b574-117a1243d791/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 87743dcc2c25562bb963887f71637e8ebeccc1d21e21cc059ac68c446a3d9b4f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:20:31,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:20:31,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:20:31,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:20:31,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:20:31,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:20:31,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:20:31,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:20:31,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:20:31,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:20:31,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:20:31,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:20:31,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:20:31,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:20:31,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:20:31,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:20:31,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:20:31,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:20:31,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:20:31,613 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:20:31,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:20:31,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:20:31,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:20:31,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:20:31,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:20:31,639 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:20:31,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:20:31,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:20:31,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:20:31,646 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:20:31,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:20:31,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:20:31,651 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:20:31,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:20:31,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:20:31,655 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:20:31,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:20:31,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:20:31,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:20:31,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:20:31,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:20:31,660 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:20:31,706 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:20:31,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:20:31,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:20:31,708 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:20:31,708 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:20:31,708 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:20:31,708 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:20:31,709 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:20:31,709 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:20:31,709 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:20:31,710 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:20:31,710 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:20:31,710 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:20:31,711 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:20:31,711 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:20:31,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:20:31,712 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:20:31,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:20:31,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:20:31,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:20:31,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:20:31,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:20:31,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:20:31,715 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:20:31,715 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:20:31,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:20:31,716 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:20:31,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:20:31,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:20:31,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:20:31,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:20:31,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:20:31,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:20:31,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:20:31,718 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:20:31,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:20:31,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:20:31,719 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:20:31,720 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:20:31,720 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_7d6df3d0-0b64-4d34-b574-117a1243d791/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87743dcc2c25562bb963887f71637e8ebeccc1d21e21cc059ac68c446a3d9b4f [2021-11-07 01:20:32,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:20:32,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:20:32,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:20:32,094 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:20:32,095 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:20:32,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec4_product31.cil.c [2021-11-07 01:20:32,182 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/data/0493a3960/f361803b41824b4693e309f63be75dda/FLAG5c639ed6b [2021-11-07 01:20:33,050 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:20:33,056 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/sv-benchmarks/c/product-lines/email_spec4_product31.cil.c [2021-11-07 01:20:33,087 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/data/0493a3960/f361803b41824b4693e309f63be75dda/FLAG5c639ed6b [2021-11-07 01:20:33,167 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/data/0493a3960/f361803b41824b4693e309f63be75dda [2021-11-07 01:20:33,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:20:33,176 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:20:33,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:20:33,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:20:33,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:20:33,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:20:33" (1/1) ... [2021-11-07 01:20:33,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ac8e0df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:33, skipping insertion in model container [2021-11-07 01:20:33,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:20:33" (1/1) ... [2021-11-07 01:20:33,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:20:33,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:20:33,793 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_7d6df3d0-0b64-4d34-b574-117a1243d791/sv-benchmarks/c/product-lines/email_spec4_product31.cil.c[26985,26998] [2021-11-07 01:20:34,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:20:34,196 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 01:20:34,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7b8756c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:34, skipping insertion in model container [2021-11-07 01:20:34,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:20:34,198 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:20:34,201 INFO L168 Benchmark]: Toolchain (without parser) took 1022.96 ms. Allocated memory is still 113.2 MB. Free memory was 80.9 MB in the beginning and 75.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:20:34,203 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 113.2 MB. Free memory was 68.1 MB in the beginning and 68.0 MB in the end (delta: 62.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:20:34,205 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1018.93 ms. Allocated memory is still 113.2 MB. Free memory was 80.6 MB in the beginning and 75.0 MB in the end (delta: 5.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:20:34,208 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 113.2 MB. Free memory was 68.1 MB in the beginning and 68.0 MB in the end (delta: 62.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1018.93 ms. Allocated memory is still 113.2 MB. Free memory was 80.6 MB in the beginning and 75.0 MB in the end (delta: 5.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1166]: 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_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/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_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/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_7d6df3d0-0b64-4d34-b574-117a1243d791/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 87743dcc2c25562bb963887f71637e8ebeccc1d21e21cc059ac68c446a3d9b4f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:20:37,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:20:37,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:20:37,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:20:37,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:20:37,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:20:37,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:20:37,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:20:37,094 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:20:37,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:20:37,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:20:37,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:20:37,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:20:37,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:20:37,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:20:37,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:20:37,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:20:37,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:20:37,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:20:37,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:20:37,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:20:37,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:20:37,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:20:37,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:20:37,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:20:37,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:20:37,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:20:37,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:20:37,142 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:20:37,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:20:37,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:20:37,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:20:37,147 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:20:37,149 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:20:37,151 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:20:37,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:20:37,155 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:20:37,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:20:37,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:20:37,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:20:37,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:20:37,161 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:20:37,223 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:20:37,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:20:37,225 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:20:37,226 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:20:37,226 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:20:37,226 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:20:37,226 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:20:37,227 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:20:37,227 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:20:37,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:20:37,230 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:20:37,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:20:37,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:20:37,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:20:37,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:20:37,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:20:37,232 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:20:37,232 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:20:37,232 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:20:37,232 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:20:37,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:20:37,233 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:20:37,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:20:37,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:20:37,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:20:37,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:20:37,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:20:37,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:20:37,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:20:37,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:20:37,235 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:20:37,236 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:20:37,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:20:37,236 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:20:37,237 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:20:37,237 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_7d6df3d0-0b64-4d34-b574-117a1243d791/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87743dcc2c25562bb963887f71637e8ebeccc1d21e21cc059ac68c446a3d9b4f [2021-11-07 01:20:37,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:20:37,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:20:37,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:20:37,750 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:20:37,751 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:20:37,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec4_product31.cil.c [2021-11-07 01:20:37,846 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/data/0c70d41d3/d664c23439104caca7b0e43d9498a77e/FLAGe5dee8127 [2021-11-07 01:20:38,631 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:20:38,632 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/sv-benchmarks/c/product-lines/email_spec4_product31.cil.c [2021-11-07 01:20:38,665 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/data/0c70d41d3/d664c23439104caca7b0e43d9498a77e/FLAGe5dee8127 [2021-11-07 01:20:38,780 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/data/0c70d41d3/d664c23439104caca7b0e43d9498a77e [2021-11-07 01:20:38,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:20:38,786 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:20:38,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:20:38,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:20:38,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:20:38,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:20:38" (1/1) ... [2021-11-07 01:20:38,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60de5c2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:38, skipping insertion in model container [2021-11-07 01:20:38,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:20:38" (1/1) ... [2021-11-07 01:20:38,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:20:38,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:20:39,415 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_7d6df3d0-0b64-4d34-b574-117a1243d791/sv-benchmarks/c/product-lines/email_spec4_product31.cil.c[26985,26998] [2021-11-07 01:20:39,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:20:39,816 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:20:39,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:20:39,904 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_7d6df3d0-0b64-4d34-b574-117a1243d791/sv-benchmarks/c/product-lines/email_spec4_product31.cil.c[26985,26998] [2021-11-07 01:20:39,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:20:39,970 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:20:40,040 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_7d6df3d0-0b64-4d34-b574-117a1243d791/sv-benchmarks/c/product-lines/email_spec4_product31.cil.c[26985,26998] [2021-11-07 01:20:40,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:20:40,173 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:20:40,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:40 WrapperNode [2021-11-07 01:20:40,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:20:40,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:20:40,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:20:40,176 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:20:40,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:40" (1/1) ... [2021-11-07 01:20:40,237 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:40" (1/1) ... [2021-11-07 01:20:40,364 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:20:40,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:20:40,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:20:40,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:20:40,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:40" (1/1) ... [2021-11-07 01:20:40,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:40" (1/1) ... [2021-11-07 01:20:40,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:40" (1/1) ... [2021-11-07 01:20:40,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:40" (1/1) ... [2021-11-07 01:20:40,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:40" (1/1) ... [2021-11-07 01:20:40,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:40" (1/1) ... [2021-11-07 01:20:40,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:40" (1/1) ... [2021-11-07 01:20:40,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:20:40,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:20:40,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:20:40,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:20:40,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:40" (1/1) ... [2021-11-07 01:20:40,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:20:40,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:20:40,606 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:20:40,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:20:40,660 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:20:40,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:20:40,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:20:40,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:20:40,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:20:45,923 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:20:45,924 INFO L299 CfgBuilder]: Removed 375 assume(true) statements. [2021-11-07 01:20:45,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:20:45 BoogieIcfgContainer [2021-11-07 01:20:45,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:20:45,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:20:45,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:20:45,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:20:45,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:20:38" (1/3) ... [2021-11-07 01:20:45,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2feb9ddc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:20:45, skipping insertion in model container [2021-11-07 01:20:45,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:20:40" (2/3) ... [2021-11-07 01:20:45,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2feb9ddc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:20:45, skipping insertion in model container [2021-11-07 01:20:45,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:20:45" (3/3) ... [2021-11-07 01:20:45,941 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec4_product31.cil.c [2021-11-07 01:20:45,948 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:20:45,949 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:20:46,028 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:20:46,041 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 01:20:46,041 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:20:46,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 567 states, 564 states have (on average 1.7375886524822695) internal successors, (980), 566 states have internal predecessors, (980), 0 states have call successors, (0), 0 states 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 01:20:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:20:46,121 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:46,122 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] [2021-11-07 01:20:46,122 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:46,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:46,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1911646779, now seen corresponding path program 1 times [2021-11-07 01:20:46,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:46,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272875314] [2021-11-07 01:20:46,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:46,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:46,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:46,148 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:46,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:20:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:46,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:20:46,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:46,936 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 01:20:46,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:47,080 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:47,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272875314] [2021-11-07 01:20:47,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272875314] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:47,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:47,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:20:47,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45318019] [2021-11-07 01:20:47,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:20:47,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:47,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:20:47,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:20:47,111 INFO L87 Difference]: Start difference. First operand has 567 states, 564 states have (on average 1.7375886524822695) internal successors, (980), 566 states have internal predecessors, (980), 0 states have call successors, (0), 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 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 01:20:47,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:47,185 INFO L93 Difference]: Finished difference Result 892 states and 1519 transitions. [2021-11-07 01:20:47,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:20:47,187 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-11-07 01:20:47,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:47,207 INFO L225 Difference]: With dead ends: 892 [2021-11-07 01:20:47,207 INFO L226 Difference]: Without dead ends: 458 [2021-11-07 01:20:47,214 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 92 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 01:20:47,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-07 01:20:47,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 458. [2021-11-07 01:20:47,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 456 states have (on average 1.743421052631579) internal successors, (795), 457 states have internal predecessors, (795), 0 states have call successors, (0), 0 states 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 01:20:47,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 795 transitions. [2021-11-07 01:20:47,300 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 795 transitions. Word has length 47 [2021-11-07 01:20:47,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:47,301 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 795 transitions. [2021-11-07 01:20:47,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 01:20:47,301 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 795 transitions. [2021-11-07 01:20:47,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:20:47,306 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:47,307 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] [2021-11-07 01:20:47,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:20:47,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:47,524 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:47,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:47,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1819110920, now seen corresponding path program 1 times [2021-11-07 01:20:47,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:47,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253220443] [2021-11-07 01:20:47,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:47,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:47,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:47,529 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:47,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:20:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:48,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:20:48,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:48,227 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 01:20:48,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:48,426 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 01:20:48,426 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:48,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [253220443] [2021-11-07 01:20:48,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [253220443] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:48,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:48,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:20:48,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141494640] [2021-11-07 01:20:48,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:20:48,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:48,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:20:48,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:48,431 INFO L87 Difference]: Start difference. First operand 458 states and 795 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:48,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:48,541 INFO L93 Difference]: Finished difference Result 1344 states and 2337 transitions. [2021-11-07 01:20:48,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:20:48,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 01:20:48,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:48,551 INFO L225 Difference]: With dead ends: 1344 [2021-11-07 01:20:48,551 INFO L226 Difference]: Without dead ends: 901 [2021-11-07 01:20:48,554 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 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 01:20:48,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-11-07 01:20:48,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 457. [2021-11-07 01:20:48,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 455 states have (on average 1.7362637362637363) internal successors, (790), 456 states have internal predecessors, (790), 0 states have call successors, (0), 0 states 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 01:20:48,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 790 transitions. [2021-11-07 01:20:48,599 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 790 transitions. Word has length 48 [2021-11-07 01:20:48,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:48,599 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 790 transitions. [2021-11-07 01:20:48,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:48,600 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 790 transitions. [2021-11-07 01:20:48,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:20:48,604 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:48,604 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:48,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:48,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:48,822 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:48,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:48,823 INFO L85 PathProgramCache]: Analyzing trace with hash 34793938, now seen corresponding path program 1 times [2021-11-07 01:20:48,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:48,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794552506] [2021-11-07 01:20:48,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:48,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:48,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:48,827 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:48,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:20:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:49,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:20:49,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:49,551 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 01:20:49,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:49,778 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 01:20:49,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:49,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794552506] [2021-11-07 01:20:49,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794552506] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:49,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:49,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:20:49,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795507394] [2021-11-07 01:20:49,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:20:49,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:49,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:20:49,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:20:49,786 INFO L87 Difference]: Start difference. First operand 457 states and 790 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 01:20:50,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:50,086 INFO L93 Difference]: Finished difference Result 1745 states and 3022 transitions. [2021-11-07 01:20:50,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:20:50,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 01:20:50,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:50,098 INFO L225 Difference]: With dead ends: 1745 [2021-11-07 01:20:50,099 INFO L226 Difference]: Without dead ends: 1306 [2021-11-07 01:20:50,100 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 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 01:20:50,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2021-11-07 01:20:50,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 456. [2021-11-07 01:20:50,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 454 states have (on average 1.7312775330396475) internal successors, (786), 455 states have internal predecessors, (786), 0 states have call successors, (0), 0 states 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 01:20:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 786 transitions. [2021-11-07 01:20:50,153 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 786 transitions. Word has length 50 [2021-11-07 01:20:50,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:50,154 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 786 transitions. [2021-11-07 01:20:50,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 01:20:50,155 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 786 transitions. [2021-11-07 01:20:50,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:20:50,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:50,157 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 01:20:50,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-07 01:20:50,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:50,375 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:50,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:50,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1919481823, now seen corresponding path program 1 times [2021-11-07 01:20:50,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:50,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618446262] [2021-11-07 01:20:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:50,378 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:50,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:50,381 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:50,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:20:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:50,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:20:50,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:51,065 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 01:20:51,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:51,267 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 01:20:51,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:51,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618446262] [2021-11-07 01:20:51,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618446262] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:51,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:51,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:20:51,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229504596] [2021-11-07 01:20:51,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:20:51,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:51,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:20:51,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:51,271 INFO L87 Difference]: Start difference. First operand 456 states and 786 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 01:20:51,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:51,360 INFO L93 Difference]: Finished difference Result 909 states and 1569 transitions. [2021-11-07 01:20:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:20:51,361 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 51 [2021-11-07 01:20:51,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:51,365 INFO L225 Difference]: With dead ends: 909 [2021-11-07 01:20:51,366 INFO L226 Difference]: Without dead ends: 461 [2021-11-07 01:20:51,367 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:51,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-07 01:20:51,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 456. [2021-11-07 01:20:51,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 454 states have (on average 1.724669603524229) internal successors, (783), 455 states have internal predecessors, (783), 0 states have call successors, (0), 0 states 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 01:20:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 783 transitions. [2021-11-07 01:20:51,410 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 783 transitions. Word has length 51 [2021-11-07 01:20:51,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:51,411 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 783 transitions. [2021-11-07 01:20:51,411 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 01:20:51,411 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 783 transitions. [2021-11-07 01:20:51,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:20:51,413 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:51,413 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 01:20:51,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:51,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:51,631 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:51,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:51,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1394504170, now seen corresponding path program 1 times [2021-11-07 01:20:51,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:51,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049258317] [2021-11-07 01:20:51,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:51,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:51,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:51,636 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:51,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:20:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:52,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:20:52,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:52,437 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 01:20:52,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:52,641 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 01:20:52,642 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:52,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049258317] [2021-11-07 01:20:52,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049258317] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:52,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:52,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:20:52,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651930142] [2021-11-07 01:20:52,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:20:52,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:52,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:20:52,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:20:52,646 INFO L87 Difference]: Start difference. First operand 456 states and 783 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:52,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:52,936 INFO L93 Difference]: Finished difference Result 1732 states and 2998 transitions. [2021-11-07 01:20:52,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:20:52,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 01:20:52,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:52,948 INFO L225 Difference]: With dead ends: 1732 [2021-11-07 01:20:52,948 INFO L226 Difference]: Without dead ends: 1302 [2021-11-07 01:20:52,950 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 98 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 01:20:52,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-11-07 01:20:52,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 456. [2021-11-07 01:20:53,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 454 states have (on average 1.7180616740088106) internal successors, (780), 455 states have internal predecessors, (780), 0 states have call successors, (0), 0 states 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 01:20:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 780 transitions. [2021-11-07 01:20:53,004 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 780 transitions. Word has length 52 [2021-11-07 01:20:53,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:53,005 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 780 transitions. [2021-11-07 01:20:53,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:53,005 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 780 transitions. [2021-11-07 01:20:53,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:20:53,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:53,007 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 01:20:53,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 01:20:53,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:53,222 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:53,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:53,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1962923407, now seen corresponding path program 1 times [2021-11-07 01:20:53,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:53,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123926857] [2021-11-07 01:20:53,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:53,224 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:53,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:53,226 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:53,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:20:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:53,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:53,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:53,944 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 01:20:53,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:54,100 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 01:20:54,101 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:54,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123926857] [2021-11-07 01:20:54,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123926857] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:54,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:54,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:20:54,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939265413] [2021-11-07 01:20:54,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:20:54,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:54,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:20:54,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:54,104 INFO L87 Difference]: Start difference. First operand 456 states and 780 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:54,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:54,217 INFO L93 Difference]: Finished difference Result 1102 states and 1887 transitions. [2021-11-07 01:20:54,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:20:54,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 01:20:54,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:54,224 INFO L225 Difference]: With dead ends: 1102 [2021-11-07 01:20:54,225 INFO L226 Difference]: Without dead ends: 886 [2021-11-07 01:20:54,226 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:54,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-11-07 01:20:54,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 670. [2021-11-07 01:20:54,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 668 states have (on average 1.7529940119760479) internal successors, (1171), 669 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states 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 01:20:54,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1171 transitions. [2021-11-07 01:20:54,310 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1171 transitions. Word has length 54 [2021-11-07 01:20:54,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:54,311 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 1171 transitions. [2021-11-07 01:20:54,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:54,311 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1171 transitions. [2021-11-07 01:20:54,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:20:54,314 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:54,314 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] [2021-11-07 01:20:54,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:54,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:54,530 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:54,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:54,531 INFO L85 PathProgramCache]: Analyzing trace with hash 312681246, now seen corresponding path program 1 times [2021-11-07 01:20:54,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:54,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1029137909] [2021-11-07 01:20:54,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:54,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:54,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:54,538 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:54,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:20:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:55,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:55,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:55,294 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 01:20:55,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:55,494 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 01:20:55,494 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:55,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1029137909] [2021-11-07 01:20:55,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1029137909] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:55,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:55,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:20:55,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57399864] [2021-11-07 01:20:55,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:55,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:55,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:55,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:55,498 INFO L87 Difference]: Start difference. First operand 670 states and 1171 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 01:20:55,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:55,628 INFO L93 Difference]: Finished difference Result 1634 states and 2861 transitions. [2021-11-07 01:20:55,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:55,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-11-07 01:20:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:55,637 INFO L225 Difference]: With dead ends: 1634 [2021-11-07 01:20:55,638 INFO L226 Difference]: Without dead ends: 1048 [2021-11-07 01:20:55,639 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 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 01:20:55,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-11-07 01:20:55,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 832. [2021-11-07 01:20:55,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 830 states have (on average 1.7650602409638554) internal successors, (1465), 831 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states 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 01:20:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1465 transitions. [2021-11-07 01:20:55,722 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1465 transitions. Word has length 66 [2021-11-07 01:20:55,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:55,723 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 1465 transitions. [2021-11-07 01:20:55,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 01:20:55,723 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1465 transitions. [2021-11-07 01:20:55,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:20:55,726 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:55,726 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] [2021-11-07 01:20:55,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:55,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:55,942 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:55,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:55,942 INFO L85 PathProgramCache]: Analyzing trace with hash 675972831, now seen corresponding path program 1 times [2021-11-07 01:20:55,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:55,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5668508] [2021-11-07 01:20:55,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:55,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:55,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:55,945 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:55,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:20:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:56,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:56,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:56,721 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 01:20:56,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:56,945 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:56,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5668508] [2021-11-07 01:20:56,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5668508] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:56,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:56,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:20:56,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982225585] [2021-11-07 01:20:56,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:56,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:56,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:56,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:56,957 INFO L87 Difference]: Start difference. First operand 832 states and 1465 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 01:20:57,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:57,148 INFO L93 Difference]: Finished difference Result 2164 states and 3829 transitions. [2021-11-07 01:20:57,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:57,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-11-07 01:20:57,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:57,159 INFO L225 Difference]: With dead ends: 2164 [2021-11-07 01:20:57,160 INFO L226 Difference]: Without dead ends: 1420 [2021-11-07 01:20:57,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 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 01:20:57,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-11-07 01:20:57,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1204. [2021-11-07 01:20:57,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1202 states have (on average 1.7828618968386023) internal successors, (2143), 1203 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states 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 01:20:57,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 2143 transitions. [2021-11-07 01:20:57,292 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 2143 transitions. Word has length 67 [2021-11-07 01:20:57,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:57,293 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 2143 transitions. [2021-11-07 01:20:57,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 01:20:57,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 2143 transitions. [2021-11-07 01:20:57,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:20:57,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:57,297 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:57,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:57,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:57,521 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:57,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:57,521 INFO L85 PathProgramCache]: Analyzing trace with hash -12164049, now seen corresponding path program 1 times [2021-11-07 01:20:57,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:57,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128031558] [2021-11-07 01:20:57,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:57,522 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:57,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:57,523 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:57,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:20:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:58,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:58,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:58,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:58,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:58,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:58,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:58,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128031558] [2021-11-07 01:20:58,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128031558] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:58,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:58,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:20:58,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3922498] [2021-11-07 01:20:58,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:20:58,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:58,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:20:58,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:58,547 INFO L87 Difference]: Start difference. First operand 1204 states and 2143 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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 01:20:58,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:58,714 INFO L93 Difference]: Finished difference Result 2378 states and 4217 transitions. [2021-11-07 01:20:58,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:58,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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 68 [2021-11-07 01:20:58,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:58,725 INFO L225 Difference]: With dead ends: 2378 [2021-11-07 01:20:58,726 INFO L226 Difference]: Without dead ends: 1420 [2021-11-07 01:20:58,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 132 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 01:20:58,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-11-07 01:20:58,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1204. [2021-11-07 01:20:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1202 states have (on average 1.781198003327787) internal successors, (2141), 1203 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states 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 01:20:58,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 2141 transitions. [2021-11-07 01:20:58,854 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 2141 transitions. Word has length 68 [2021-11-07 01:20:58,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:58,855 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 2141 transitions. [2021-11-07 01:20:58,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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 01:20:58,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 2141 transitions. [2021-11-07 01:20:58,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:20:58,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:58,859 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] [2021-11-07 01:20:58,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:59,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:59,077 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:59,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:59,077 INFO L85 PathProgramCache]: Analyzing trace with hash -2019565520, now seen corresponding path program 1 times [2021-11-07 01:20:59,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:59,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616485447] [2021-11-07 01:20:59,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:59,079 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:59,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:59,080 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:59,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:20:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:59,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:59,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:59,843 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 01:20:59,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:00,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:00,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616485447] [2021-11-07 01:21:00,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616485447] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:00,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:00,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:21:00,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195967457] [2021-11-07 01:21:00,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:21:00,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:00,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:21:00,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:00,018 INFO L87 Difference]: Start difference. First operand 1204 states and 2141 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:00,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:00,214 INFO L93 Difference]: Finished difference Result 3252 states and 5812 transitions. [2021-11-07 01:21:00,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:21:00,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:21:00,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:00,231 INFO L225 Difference]: With dead ends: 3252 [2021-11-07 01:21:00,231 INFO L226 Difference]: Without dead ends: 2144 [2021-11-07 01:21:00,236 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:00,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-11-07 01:21:00,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1928. [2021-11-07 01:21:00,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1926 states have (on average 1.7964693665628244) internal successors, (3460), 1927 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:00,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 3460 transitions. [2021-11-07 01:21:00,438 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 3460 transitions. Word has length 68 [2021-11-07 01:21:00,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:00,438 INFO L470 AbstractCegarLoop]: Abstraction has 1928 states and 3460 transitions. [2021-11-07 01:21:00,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:00,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 3460 transitions. [2021-11-07 01:21:00,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:21:00,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:00,450 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:00,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:00,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:00,669 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:00,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:00,669 INFO L85 PathProgramCache]: Analyzing trace with hash -918013731, now seen corresponding path program 1 times [2021-11-07 01:21:00,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:00,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361794861] [2021-11-07 01:21:00,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:00,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:00,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:00,673 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:00,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:21:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:01,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:21:01,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:01,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:01,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:01,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361794861] [2021-11-07 01:21:01,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361794861] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:01,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:01,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:21:01,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627026595] [2021-11-07 01:21:01,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:21:01,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:01,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:21:01,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:01,768 INFO L87 Difference]: Start difference. First operand 1928 states and 3460 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:02,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:02,054 INFO L93 Difference]: Finished difference Result 5160 states and 9288 transitions. [2021-11-07 01:21:02,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:21:02,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:21:02,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:02,081 INFO L225 Difference]: With dead ends: 5160 [2021-11-07 01:21:02,082 INFO L226 Difference]: Without dead ends: 3362 [2021-11-07 01:21:02,085 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:02,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3362 states. [2021-11-07 01:21:02,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3362 to 3146. [2021-11-07 01:21:02,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3146 states, 3144 states have (on average 1.8043893129770991) internal successors, (5673), 3145 states have internal predecessors, (5673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:02,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3146 states to 3146 states and 5673 transitions. [2021-11-07 01:21:02,430 INFO L78 Accepts]: Start accepts. Automaton has 3146 states and 5673 transitions. Word has length 69 [2021-11-07 01:21:02,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:02,432 INFO L470 AbstractCegarLoop]: Abstraction has 3146 states and 5673 transitions. [2021-11-07 01:21:02,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:02,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3146 states and 5673 transitions. [2021-11-07 01:21:02,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:21:02,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:02,438 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 01:21:02,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:02,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:02,657 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:02,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:02,657 INFO L85 PathProgramCache]: Analyzing trace with hash 758815231, now seen corresponding path program 1 times [2021-11-07 01:21:02,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:02,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315470888] [2021-11-07 01:21:02,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:02,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:02,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:02,661 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:02,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:21:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:03,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:21:03,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:03,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:03,692 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:03,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315470888] [2021-11-07 01:21:03,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315470888] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:03,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:03,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:21:03,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193971609] [2021-11-07 01:21:03,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:21:03,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:03,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:21:03,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:03,694 INFO L87 Difference]: Start difference. First operand 3146 states and 5673 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 01:21:04,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:04,128 INFO L93 Difference]: Finished difference Result 8530 states and 15410 transitions. [2021-11-07 01:21:04,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:21:04,129 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 01:21:04,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:04,185 INFO L225 Difference]: With dead ends: 8530 [2021-11-07 01:21:04,185 INFO L226 Difference]: Without dead ends: 5548 [2021-11-07 01:21:04,192 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 01:21:04,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5548 states. [2021-11-07 01:21:04,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5548 to 5332. [2021-11-07 01:21:04,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5332 states, 5330 states have (on average 1.8075046904315197) internal successors, (9634), 5331 states have internal predecessors, (9634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:04,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5332 states to 5332 states and 9634 transitions. [2021-11-07 01:21:04,728 INFO L78 Accepts]: Start accepts. Automaton has 5332 states and 9634 transitions. Word has length 70 [2021-11-07 01:21:04,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:04,728 INFO L470 AbstractCegarLoop]: Abstraction has 5332 states and 9634 transitions. [2021-11-07 01:21:04,729 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 01:21:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 5332 states and 9634 transitions. [2021-11-07 01:21:04,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:21:04,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:04,738 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] [2021-11-07 01:21:04,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 01:21:04,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:04,956 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:04,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:04,957 INFO L85 PathProgramCache]: Analyzing trace with hash 373577307, now seen corresponding path program 1 times [2021-11-07 01:21:04,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:04,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069303564] [2021-11-07 01:21:04,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:04,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:04,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:04,960 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:04,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:21:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:05,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:21:05,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:05,995 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 01:21:05,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:06,228 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 01:21:06,229 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:06,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069303564] [2021-11-07 01:21:06,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069303564] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:06,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:06,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:21:06,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212185736] [2021-11-07 01:21:06,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:21:06,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:06,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:21:06,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:21:06,232 INFO L87 Difference]: Start difference. First operand 5332 states and 9634 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:09,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:09,611 INFO L93 Difference]: Finished difference Result 19968 states and 36117 transitions. [2021-11-07 01:21:09,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:21:09,612 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 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 01:21:09,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:09,680 INFO L225 Difference]: With dead ends: 19968 [2021-11-07 01:21:09,680 INFO L226 Difference]: Without dead ends: 14880 [2021-11-07 01:21:09,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 136 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 01:21:09,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14880 states. [2021-11-07 01:21:10,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14880 to 5282. [2021-11-07 01:21:10,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5282 states, 5280 states have (on average 1.7867424242424241) internal successors, (9434), 5281 states have internal predecessors, (9434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:10,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 9434 transitions. [2021-11-07 01:21:10,334 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 9434 transitions. Word has length 71 [2021-11-07 01:21:10,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:10,334 INFO L470 AbstractCegarLoop]: Abstraction has 5282 states and 9434 transitions. [2021-11-07 01:21:10,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:10,335 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 9434 transitions. [2021-11-07 01:21:10,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:21:10,341 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:10,341 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 01:21:10,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:10,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:10,562 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:10,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:10,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1183884, now seen corresponding path program 1 times [2021-11-07 01:21:10,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:10,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295438976] [2021-11-07 01:21:10,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:10,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:10,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:10,566 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:10,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:21:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:11,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:21:11,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:11,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:12,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:12,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:12,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295438976] [2021-11-07 01:21:12,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295438976] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:12,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:12,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:21:12,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46803091] [2021-11-07 01:21:12,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:21:12,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:12,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:21:12,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:12,070 INFO L87 Difference]: Start difference. First operand 5282 states and 9434 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 01:21:12,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:12,861 INFO L93 Difference]: Finished difference Result 15267 states and 27316 transitions. [2021-11-07 01:21:12,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:21:12,862 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 01:21:12,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:12,896 INFO L225 Difference]: With dead ends: 15267 [2021-11-07 01:21:12,896 INFO L226 Difference]: Without dead ends: 10156 [2021-11-07 01:21:12,906 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 01:21:12,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10156 states. [2021-11-07 01:21:13,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10156 to 9940. [2021-11-07 01:21:13,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9940 states, 9938 states have (on average 1.7881867578989736) internal successors, (17771), 9939 states have internal predecessors, (17771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9940 states to 9940 states and 17771 transitions. [2021-11-07 01:21:13,588 INFO L78 Accepts]: Start accepts. Automaton has 9940 states and 17771 transitions. Word has length 71 [2021-11-07 01:21:13,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:13,588 INFO L470 AbstractCegarLoop]: Abstraction has 9940 states and 17771 transitions. [2021-11-07 01:21:13,589 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 01:21:13,589 INFO L276 IsEmpty]: Start isEmpty. Operand 9940 states and 17771 transitions. [2021-11-07 01:21:13,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:21:13,603 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:13,604 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] [2021-11-07 01:21:13,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:13,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:13,813 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:13,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:13,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1885115392, now seen corresponding path program 1 times [2021-11-07 01:21:13,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:13,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766262129] [2021-11-07 01:21:13,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:13,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:13,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:13,815 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:13,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:21:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:14,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:21:14,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:14,769 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 01:21:14,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:15,029 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 01:21:15,029 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:15,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766262129] [2021-11-07 01:21:15,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766262129] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:21:15,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [260263382] [2021-11-07 01:21:15,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:15,031 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:21:15,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:21:15,047 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:21:15,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:21:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:16,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:21:16,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:16,442 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 01:21:16,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:16,802 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 01:21:16,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [260263382] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:16,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:21:16,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:21:16,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547337366] [2021-11-07 01:21:16,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:21:16,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:16,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:21:16,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:21:16,804 INFO L87 Difference]: Start difference. First operand 9940 states and 17771 transitions. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:25,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:25,106 INFO L93 Difference]: Finished difference Result 60027 states and 107633 transitions. [2021-11-07 01:21:25,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 01:21:25,106 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 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 01:21:25,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:25,322 INFO L225 Difference]: With dead ends: 60027 [2021-11-07 01:21:25,322 INFO L226 Difference]: Without dead ends: 59829 [2021-11-07 01:21:25,339 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 01:21:25,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59829 states. [2021-11-07 01:21:26,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59829 to 19822. [2021-11-07 01:21:26,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19822 states, 19820 states have (on average 1.7884964682139253) internal successors, (35448), 19821 states have internal predecessors, (35448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:26,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19822 states to 19822 states and 35448 transitions. [2021-11-07 01:21:26,979 INFO L78 Accepts]: Start accepts. Automaton has 19822 states and 35448 transitions. Word has length 72 [2021-11-07 01:21:26,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:26,980 INFO L470 AbstractCegarLoop]: Abstraction has 19822 states and 35448 transitions. [2021-11-07 01:21:26,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:26,980 INFO L276 IsEmpty]: Start isEmpty. Operand 19822 states and 35448 transitions. [2021-11-07 01:21:26,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:21:26,997 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:26,997 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] [2021-11-07 01:21:27,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:27,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:27,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:27,410 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:27,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:27,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1939879959, now seen corresponding path program 1 times [2021-11-07 01:21:27,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:27,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992613802] [2021-11-07 01:21:27,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:27,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:27,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:27,412 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:27,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:21:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:28,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:21:28,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:28,332 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 01:21:28,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:28,554 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 01:21:28,555 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:28,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992613802] [2021-11-07 01:21:28,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992613802] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:21:28,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [334192897] [2021-11-07 01:21:28,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:28,556 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:21:28,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:21:28,557 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:21:28,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:21:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:29,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:21:29,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:29,750 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 01:21:29,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:29,964 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 01:21:29,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [334192897] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:29,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:21:29,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:21:29,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635267979] [2021-11-07 01:21:29,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:21:29,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:29,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:21:29,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:21:29,967 INFO L87 Difference]: Start difference. First operand 19822 states and 35448 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:32,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:32,994 INFO L93 Difference]: Finished difference Result 20445 states and 36467 transitions. [2021-11-07 01:21:32,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:21:32,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 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 01:21:32,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:33,050 INFO L225 Difference]: With dead ends: 20445 [2021-11-07 01:21:33,051 INFO L226 Difference]: Without dead ends: 20079 [2021-11-07 01:21:33,058 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:21:33,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20079 states. [2021-11-07 01:21:34,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20079 to 19816. [2021-11-07 01:21:34,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19816 states, 19814 states have (on average 1.788381952155042) internal successors, (35435), 19815 states have internal predecessors, (35435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:34,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19816 states to 19816 states and 35435 transitions. [2021-11-07 01:21:34,554 INFO L78 Accepts]: Start accepts. Automaton has 19816 states and 35435 transitions. Word has length 73 [2021-11-07 01:21:34,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:34,555 INFO L470 AbstractCegarLoop]: Abstraction has 19816 states and 35435 transitions. [2021-11-07 01:21:34,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:34,555 INFO L276 IsEmpty]: Start isEmpty. Operand 19816 states and 35435 transitions. [2021-11-07 01:21:34,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:21:34,570 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:34,570 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] [2021-11-07 01:21:34,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:34,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:34,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:21:34,986 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:34,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:34,986 INFO L85 PathProgramCache]: Analyzing trace with hash -526628051, now seen corresponding path program 1 times [2021-11-07 01:21:34,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:34,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153458807] [2021-11-07 01:21:34,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:34,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:34,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:34,988 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:34,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:21:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:35,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:21:35,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:35,930 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 01:21:35,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:36,112 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 01:21:36,112 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:36,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153458807] [2021-11-07 01:21:36,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153458807] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:36,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:36,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:21:36,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2670713] [2021-11-07 01:21:36,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:21:36,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:36,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:21:36,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:21:36,114 INFO L87 Difference]: Start difference. First operand 19816 states and 35435 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:37,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:37,380 INFO L93 Difference]: Finished difference Result 38718 states and 69459 transitions. [2021-11-07 01:21:37,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:21:37,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 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 01:21:37,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:37,422 INFO L225 Difference]: With dead ends: 38718 [2021-11-07 01:21:37,422 INFO L226 Difference]: Without dead ends: 19149 [2021-11-07 01:21:37,443 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:21:37,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19149 states. [2021-11-07 01:21:38,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19149 to 9938. [2021-11-07 01:21:38,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9938 states, 9936 states have (on average 1.7876409017713366) internal successors, (17762), 9937 states have internal predecessors, (17762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9938 states to 9938 states and 17762 transitions. [2021-11-07 01:21:38,189 INFO L78 Accepts]: Start accepts. Automaton has 9938 states and 17762 transitions. Word has length 73 [2021-11-07 01:21:38,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:38,189 INFO L470 AbstractCegarLoop]: Abstraction has 9938 states and 17762 transitions. [2021-11-07 01:21:38,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:38,190 INFO L276 IsEmpty]: Start isEmpty. Operand 9938 states and 17762 transitions. [2021-11-07 01:21:38,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:21:38,199 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:38,199 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] [2021-11-07 01:21:38,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-07 01:21:38,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:38,417 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:38,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:38,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1967306583, now seen corresponding path program 1 times [2021-11-07 01:21:38,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:38,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80585896] [2021-11-07 01:21:38,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:38,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:38,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:38,420 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:38,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:21:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:39,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:21:39,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:39,375 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 01:21:39,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:39,588 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 01:21:39,588 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:39,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [80585896] [2021-11-07 01:21:39,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [80585896] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:21:39,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [954384543] [2021-11-07 01:21:39,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:39,589 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:21:39,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:21:39,590 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:21:39,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:21:40,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:40,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:21:40,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:41,327 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 01:21:41,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:41,757 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 01:21:41,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [954384543] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:41,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:21:41,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:21:41,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207541925] [2021-11-07 01:21:41,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:21:41,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:41,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:21:41,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:21:41,759 INFO L87 Difference]: Start difference. First operand 9938 states and 17762 transitions. Second operand has 16 states, 16 states have (on average 7.75) internal successors, (124), 15 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:00,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:00,925 INFO L93 Difference]: Finished difference Result 21858 states and 38649 transitions. [2021-11-07 01:22:00,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 01:22:00,932 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.75) internal successors, (124), 15 states have internal predecessors, (124), 0 states have call successors, (0), 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 01:22:00,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:00,971 INFO L225 Difference]: With dead ends: 21858 [2021-11-07 01:22:00,971 INFO L226 Difference]: Without dead ends: 21671 [2021-11-07 01:22:00,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 01:22:00,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21671 states. [2021-11-07 01:22:02,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21671 to 19793. [2021-11-07 01:22:02,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19793 states, 19791 states have (on average 1.7885402455661665) internal successors, (35397), 19792 states have internal predecessors, (35397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:02,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19793 states to 19793 states and 35397 transitions. [2021-11-07 01:22:02,419 INFO L78 Accepts]: Start accepts. Automaton has 19793 states and 35397 transitions. Word has length 75 [2021-11-07 01:22:02,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:02,419 INFO L470 AbstractCegarLoop]: Abstraction has 19793 states and 35397 transitions. [2021-11-07 01:22:02,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.75) internal successors, (124), 15 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:02,419 INFO L276 IsEmpty]: Start isEmpty. Operand 19793 states and 35397 transitions. [2021-11-07 01:22:02,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:22:02,428 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:02,428 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] [2021-11-07 01:22:02,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:02,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-11-07 01:22:02,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:22:02,829 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:02,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:02,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1247129666, now seen corresponding path program 1 times [2021-11-07 01:22:02,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:02,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120225053] [2021-11-07 01:22:02,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:02,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:02,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:02,831 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:02,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:22:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:03,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:22:03,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:03,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:04,054 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:04,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120225053] [2021-11-07 01:22:04,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [120225053] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:22:04,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1637476296] [2021-11-07 01:22:04,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:04,055 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:22:04,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:22:04,056 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:22:04,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:22:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:05,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:22:05,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:22:05,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:22:05,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1637476296] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:05,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:22:05,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 13 [2021-11-07 01:22:05,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351718497] [2021-11-07 01:22:05,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:22:05,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:05,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:22:05,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:22:05,741 INFO L87 Difference]: Start difference. First operand 19793 states and 35397 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 01:22:09,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:09,065 INFO L93 Difference]: Finished difference Result 20420 states and 36416 transitions. [2021-11-07 01:22:09,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:22:09,066 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 76 [2021-11-07 01:22:09,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:09,099 INFO L225 Difference]: With dead ends: 20420 [2021-11-07 01:22:09,099 INFO L226 Difference]: Without dead ends: 19971 [2021-11-07 01:22:09,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:22:09,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19971 states. [2021-11-07 01:22:10,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19971 to 19775. [2021-11-07 01:22:10,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19775 states, 19773 states have (on average 1.7881454508673444) internal successors, (35357), 19774 states have internal predecessors, (35357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:10,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19775 states to 19775 states and 35357 transitions. [2021-11-07 01:22:10,624 INFO L78 Accepts]: Start accepts. Automaton has 19775 states and 35357 transitions. Word has length 76 [2021-11-07 01:22:10,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:10,624 INFO L470 AbstractCegarLoop]: Abstraction has 19775 states and 35357 transitions. [2021-11-07 01:22:10,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 01:22:10,625 INFO L276 IsEmpty]: Start isEmpty. Operand 19775 states and 35357 transitions. [2021-11-07 01:22:10,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:22:10,636 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:10,636 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] [2021-11-07 01:22:10,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:10,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:11,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:22:11,056 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:11,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:11,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1677280794, now seen corresponding path program 1 times [2021-11-07 01:22:11,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:11,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470678782] [2021-11-07 01:22:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:11,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:11,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:11,060 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:11,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:22:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:12,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:22:12,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:12,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:12,715 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:12,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470678782] [2021-11-07 01:22:12,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470678782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:22:12,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1606716183] [2021-11-07 01:22:12,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:12,716 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:22:12,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:22:12,727 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:22:12,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:22:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:14,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:22:14,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:22:14,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:22:15,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1606716183] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:15,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:22:15,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:22:15,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844982720] [2021-11-07 01:22:15,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:22:15,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:15,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:22:15,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:22:15,218 INFO L87 Difference]: Start difference. First operand 19775 states and 35357 transitions. Second operand has 16 states, 16 states have (on average 7.875) internal successors, (126), 15 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:31,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:31,680 INFO L93 Difference]: Finished difference Result 42926 states and 76022 transitions. [2021-11-07 01:22:31,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 01:22:31,681 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.875) internal successors, (126), 15 states have internal predecessors, (126), 0 states have call successors, (0), 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 01:22:31,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:31,752 INFO L225 Difference]: With dead ends: 42926 [2021-11-07 01:22:31,752 INFO L226 Difference]: Without dead ends: 42588 [2021-11-07 01:22:31,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 01:22:31,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42588 states. [2021-11-07 01:22:34,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42588 to 39380. [2021-11-07 01:22:34,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39380 states, 39378 states have (on average 1.788587536187719) internal successors, (70431), 39379 states have internal predecessors, (70431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:34,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39380 states to 39380 states and 70431 transitions. [2021-11-07 01:22:34,731 INFO L78 Accepts]: Start accepts. Automaton has 39380 states and 70431 transitions. Word has length 76 [2021-11-07 01:22:34,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:34,731 INFO L470 AbstractCegarLoop]: Abstraction has 39380 states and 70431 transitions. [2021-11-07 01:22:34,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.875) internal successors, (126), 15 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:34,731 INFO L276 IsEmpty]: Start isEmpty. Operand 39380 states and 70431 transitions. [2021-11-07 01:22:34,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:22:34,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:34,749 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] [2021-11-07 01:22:34,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:34,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-07 01:22:35,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:35,150 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:35,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:35,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1337822824, now seen corresponding path program 1 times [2021-11-07 01:22:35,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:35,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238339700] [2021-11-07 01:22:35,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:35,151 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:35,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:35,152 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:35,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:22:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:36,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:22:36,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:36,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:36,550 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:36,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238339700] [2021-11-07 01:22:36,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1238339700] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:22:36,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [986763384] [2021-11-07 01:22:36,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:36,551 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:22:36,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:22:36,551 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:22:36,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:22:37,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:37,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:22:37,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:22:38,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:22:38,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [986763384] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:38,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:22:38,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [5, 5] total 17 [2021-11-07 01:22:38,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797205358] [2021-11-07 01:22:38,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:22:38,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:38,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:22:38,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:22:38,475 INFO L87 Difference]: Start difference. First operand 39380 states and 70431 transitions. Second operand has 11 states, 11 states have (on average 12.090909090909092) internal successors, (133), 11 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:53,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:53,931 INFO L93 Difference]: Finished difference Result 163111 states and 292180 transitions. [2021-11-07 01:22:53,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:22:53,932 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 12.090909090909092) internal successors, (133), 11 states have internal predecessors, (133), 0 states have call successors, (0), 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 01:22:53,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:54,275 INFO L225 Difference]: With dead ends: 163111 [2021-11-07 01:22:54,275 INFO L226 Difference]: Without dead ends: 163099 [2021-11-07 01:22:54,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 01:22:54,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163099 states. [2021-11-07 01:22:57,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163099 to 39394. [2021-11-07 01:22:57,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39394 states, 39392 states have (on average 1.7882818846466288) internal successors, (70444), 39393 states have internal predecessors, (70444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:58,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39394 states to 39394 states and 70444 transitions. [2021-11-07 01:22:58,021 INFO L78 Accepts]: Start accepts. Automaton has 39394 states and 70444 transitions. Word has length 76 [2021-11-07 01:22:58,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:58,022 INFO L470 AbstractCegarLoop]: Abstraction has 39394 states and 70444 transitions. [2021-11-07 01:22:58,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.090909090909092) internal successors, (133), 11 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:58,022 INFO L276 IsEmpty]: Start isEmpty. Operand 39394 states and 70444 transitions. [2021-11-07 01:22:58,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:22:58,036 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:58,037 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:58,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:58,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:58,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:22:58,437 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:58,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:58,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1475588026, now seen corresponding path program 1 times [2021-11-07 01:22:58,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:58,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446134403] [2021-11-07 01:22:58,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:58,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:58,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:58,440 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:58,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:22:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:59,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:22:59,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:59,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:00,049 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 01:23:00,049 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:00,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446134403] [2021-11-07 01:23:00,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446134403] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:23:00,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [412570691] [2021-11-07 01:23:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:00,050 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:23:00,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:23:00,050 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:23:00,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:23:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:01,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:23:01,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:02,135 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 01:23:02,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:02,439 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 01:23:02,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [412570691] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:02,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:23:02,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 15 [2021-11-07 01:23:02,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551083032] [2021-11-07 01:23:02,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:23:02,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:02,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:23:02,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:23:02,442 INFO L87 Difference]: Start difference. First operand 39394 states and 70444 transitions. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:07,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:07,959 INFO L93 Difference]: Finished difference Result 40810 states and 72780 transitions. [2021-11-07 01:23:07,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:23:07,962 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 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 77 [2021-11-07 01:23:07,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:08,025 INFO L225 Difference]: With dead ends: 40810 [2021-11-07 01:23:08,025 INFO L226 Difference]: Without dead ends: 40030 [2021-11-07 01:23:08,033 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:23:08,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40030 states. [2021-11-07 01:23:10,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40030 to 39364. [2021-11-07 01:23:10,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39364 states, 39363 states have (on average 1.788151309605467) internal successors, (70387), 39363 states have internal predecessors, (70387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:10,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39364 states to 39364 states and 70387 transitions. [2021-11-07 01:23:10,900 INFO L78 Accepts]: Start accepts. Automaton has 39364 states and 70387 transitions. Word has length 77 [2021-11-07 01:23:10,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:10,900 INFO L470 AbstractCegarLoop]: Abstraction has 39364 states and 70387 transitions. [2021-11-07 01:23:10,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:10,900 INFO L276 IsEmpty]: Start isEmpty. Operand 39364 states and 70387 transitions. [2021-11-07 01:23:10,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 01:23:10,947 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:10,948 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:23:10,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:11,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-07 01:23:11,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:11,348 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:23:11,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:11,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1909824835, now seen corresponding path program 1 times [2021-11-07 01:23:11,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:11,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827069510] [2021-11-07 01:23:11,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:11,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:11,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:11,351 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:11,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:23:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:12,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:23:12,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:12,913 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 01:23:12,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:13,230 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 01:23:13,230 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:13,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827069510] [2021-11-07 01:23:13,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827069510] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:23:13,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1177910556] [2021-11-07 01:23:13,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:13,231 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:23:13,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:23:13,231 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:23:13,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d6df3d0-0b64-4d34-b574-117a1243d791/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:23:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:14,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:23:14,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:15,029 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 01:23:15,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:15,257 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 01:23:15,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1177910556] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:15,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:23:15,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:23:15,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857670217] [2021-11-07 01:23:15,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:23:15,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:15,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:23:15,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:23:15,258 INFO L87 Difference]: Start difference. First operand 39364 states and 70387 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)