./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec8_product16.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_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/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_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product16.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/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_d7c63722-9e38-4a43-8308-f92c45de0474/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 8a7679b9688c44fd84543e8b684d34e72b379518d806d27199a245477e871776 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:00:23,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:00:23,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:00:23,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:00:23,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:00:23,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:00:23,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:00:23,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:00:23,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:00:23,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:00:23,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:00:23,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:00:23,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:00:23,179 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:00:23,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:00:23,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:00:23,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:00:23,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:00:23,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:00:23,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:00:23,209 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:00:23,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:00:23,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:00:23,216 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:00:23,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:00:23,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:00:23,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:00:23,233 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:00:23,234 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:00:23,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:00:23,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:00:23,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:00:23,240 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:00:23,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:00:23,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:00:23,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:00:23,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:00:23,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:00:23,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:00:23,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:00:23,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:00:23,250 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:00:23,301 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:00:23,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:00:23,303 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:00:23,303 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:00:23,303 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:00:23,304 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:00:23,304 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:00:23,304 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:00:23,305 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:00:23,305 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:00:23,305 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:00:23,305 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:00:23,306 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:00:23,306 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:00:23,307 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:00:23,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:00:23,308 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:00:23,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:00:23,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:00:23,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:00:23,309 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:00:23,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:00:23,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:00:23,310 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:00:23,310 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:00:23,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:00:23,311 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:00:23,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:00:23,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:00:23,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:00:23,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:00:23,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:00:23,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:00:23,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:00:23,314 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:00:23,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:00:23,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:00:23,314 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:00:23,315 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:00:23,315 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_d7c63722-9e38-4a43-8308-f92c45de0474/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a7679b9688c44fd84543e8b684d34e72b379518d806d27199a245477e871776 [2021-11-07 02:00:23,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:00:23,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:00:23,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:00:23,664 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:00:23,665 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:00:23,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product16.cil.c [2021-11-07 02:00:23,771 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/data/51e945a5d/3713e218a74c4c4aac97169afec9a1db/FLAGed75d3c63 [2021-11-07 02:00:24,574 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:00:24,574 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/sv-benchmarks/c/product-lines/email_spec8_product16.cil.c [2021-11-07 02:00:24,633 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/data/51e945a5d/3713e218a74c4c4aac97169afec9a1db/FLAGed75d3c63 [2021-11-07 02:00:24,787 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/data/51e945a5d/3713e218a74c4c4aac97169afec9a1db [2021-11-07 02:00:24,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:00:24,792 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:00:24,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:00:24,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:00:24,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:00:24,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:00:24" (1/1) ... [2021-11-07 02:00:24,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24b20ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:24, skipping insertion in model container [2021-11-07 02:00:24,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:00:24" (1/1) ... [2021-11-07 02:00:24,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:00:24,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:00:25,714 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_d7c63722-9e38-4a43-8308-f92c45de0474/sv-benchmarks/c/product-lines/email_spec8_product16.cil.c[51682,51695] [2021-11-07 02:00:25,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:00:25,774 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 02:00:25,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6995d41b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:25, skipping insertion in model container [2021-11-07 02:00:25,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:00:25,776 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:00:25,779 INFO L168 Benchmark]: Toolchain (without parser) took 985.34 ms. Allocated memory was 98.6 MB in the beginning and 127.9 MB in the end (delta: 29.4 MB). Free memory was 62.5 MB in the beginning and 90.7 MB in the end (delta: -28.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:00:25,780 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 98.6 MB. Free memory is still 51.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:00:25,781 INFO L168 Benchmark]: CACSL2BoogieTranslator took 982.00 ms. Allocated memory was 98.6 MB in the beginning and 127.9 MB in the end (delta: 29.4 MB). Free memory was 62.2 MB in the beginning and 90.7 MB in the end (delta: -28.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:00:25,784 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 98.6 MB. Free memory is still 51.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 982.00 ms. Allocated memory was 98.6 MB in the beginning and 127.9 MB in the end (delta: 29.4 MB). Free memory was 62.2 MB in the beginning and 90.7 MB in the end (delta: -28.5 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: 1281]: 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_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/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_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product16.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/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_d7c63722-9e38-4a43-8308-f92c45de0474/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 8a7679b9688c44fd84543e8b684d34e72b379518d806d27199a245477e871776 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:00:28,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:00:28,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:00:28,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:00:28,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:00:28,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:00:28,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:00:28,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:00:28,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:00:28,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:00:28,567 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:00:28,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:00:28,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:00:28,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:00:28,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:00:28,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:00:28,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:00:28,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:00:28,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:00:28,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:00:28,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:00:28,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:00:28,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:00:28,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:00:28,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:00:28,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:00:28,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:00:28,629 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:00:28,630 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:00:28,631 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:00:28,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:00:28,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:00:28,636 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:00:28,637 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:00:28,638 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:00:28,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:00:28,640 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:00:28,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:00:28,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:00:28,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:00:28,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:00:28,645 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:00:28,709 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:00:28,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:00:28,711 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:00:28,711 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:00:28,712 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:00:28,712 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:00:28,712 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:00:28,712 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:00:28,713 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:00:28,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:00:28,716 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:00:28,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:00:28,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:00:28,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:00:28,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:00:28,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:00:28,717 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:00:28,718 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:00:28,718 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:00:28,718 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:00:28,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:00:28,719 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:00:28,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:00:28,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:00:28,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:00:28,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:00:28,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:00:28,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:00:28,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:00:28,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:00:28,721 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:00:28,722 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:00:28,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:00:28,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:00:28,723 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:00:28,723 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_d7c63722-9e38-4a43-8308-f92c45de0474/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a7679b9688c44fd84543e8b684d34e72b379518d806d27199a245477e871776 [2021-11-07 02:00:29,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:00:29,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:00:29,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:00:29,267 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:00:29,268 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:00:29,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product16.cil.c [2021-11-07 02:00:29,352 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/data/9facfc497/4a12a222675c4e02a8250f74b6ecf5cf/FLAG6b481e225 [2021-11-07 02:00:30,254 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:00:30,255 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/sv-benchmarks/c/product-lines/email_spec8_product16.cil.c [2021-11-07 02:00:30,286 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/data/9facfc497/4a12a222675c4e02a8250f74b6ecf5cf/FLAG6b481e225 [2021-11-07 02:00:30,415 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/data/9facfc497/4a12a222675c4e02a8250f74b6ecf5cf [2021-11-07 02:00:30,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:00:30,422 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:00:30,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:00:30,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:00:30,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:00:30,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:00:30" (1/1) ... [2021-11-07 02:00:30,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9bc8c1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:30, skipping insertion in model container [2021-11-07 02:00:30,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:00:30" (1/1) ... [2021-11-07 02:00:30,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:00:30,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:00:31,360 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_d7c63722-9e38-4a43-8308-f92c45de0474/sv-benchmarks/c/product-lines/email_spec8_product16.cil.c[51682,51695] [2021-11-07 02:00:31,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:00:31,465 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:00:31,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:00:31,612 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_d7c63722-9e38-4a43-8308-f92c45de0474/sv-benchmarks/c/product-lines/email_spec8_product16.cil.c[51682,51695] [2021-11-07 02:00:31,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:00:31,637 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:00:31,716 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_d7c63722-9e38-4a43-8308-f92c45de0474/sv-benchmarks/c/product-lines/email_spec8_product16.cil.c[51682,51695] [2021-11-07 02:00:31,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:00:31,789 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:00:31,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:31 WrapperNode [2021-11-07 02:00:31,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:00:31,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:00:31,792 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:00:31,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:00:31,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:31" (1/1) ... [2021-11-07 02:00:31,868 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:31" (1/1) ... [2021-11-07 02:00:31,992 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:00:31,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:00:31,993 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:00:31,993 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:00:32,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:31" (1/1) ... [2021-11-07 02:00:32,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:31" (1/1) ... [2021-11-07 02:00:32,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:31" (1/1) ... [2021-11-07 02:00:32,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:31" (1/1) ... [2021-11-07 02:00:32,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:31" (1/1) ... [2021-11-07 02:00:32,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:31" (1/1) ... [2021-11-07 02:00:32,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:31" (1/1) ... [2021-11-07 02:00:32,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:00:32,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:00:32,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:00:32,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:00:32,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:31" (1/1) ... [2021-11-07 02:00:32,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:00:32,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:00:32,216 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:00:32,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:00:32,271 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:00:32,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:00:32,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:00:32,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:00:32,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:00:37,135 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:00:37,135 INFO L299 CfgBuilder]: Removed 295 assume(true) statements. [2021-11-07 02:00:37,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:00:37 BoogieIcfgContainer [2021-11-07 02:00:37,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:00:37,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:00:37,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:00:37,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:00:37,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:00:30" (1/3) ... [2021-11-07 02:00:37,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@247e6d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:00:37, skipping insertion in model container [2021-11-07 02:00:37,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:31" (2/3) ... [2021-11-07 02:00:37,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@247e6d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:00:37, skipping insertion in model container [2021-11-07 02:00:37,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:00:37" (3/3) ... [2021-11-07 02:00:37,151 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec8_product16.cil.c [2021-11-07 02:00:37,158 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:00:37,159 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 02:00:37,243 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:00:37,264 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 02:00:37,264 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 02:00:37,303 INFO L276 IsEmpty]: Start isEmpty. Operand has 451 states, 448 states have (on average 1.7455357142857142) internal successors, (782), 450 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:37,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 02:00:37,328 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:37,329 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:00:37,330 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:37,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:37,337 INFO L85 PathProgramCache]: Analyzing trace with hash 827013746, now seen corresponding path program 1 times [2021-11-07 02:00:37,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:37,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1493886061] [2021-11-07 02:00:37,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:37,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:37,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:37,356 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:37,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:00:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:37,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:00:37,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:38,106 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 02:00:38,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:38,305 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 02:00:38,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:38,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1493886061] [2021-11-07 02:00:38,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1493886061] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:38,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:38,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:00:38,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574448074] [2021-11-07 02:00:38,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:00:38,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:38,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:00:38,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:00:38,347 INFO L87 Difference]: Start difference. First operand has 451 states, 448 states have (on average 1.7455357142857142) internal successors, (782), 450 states have internal predecessors, (782), 0 states have call successors, (0), 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 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:38,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:38,429 INFO L93 Difference]: Finished difference Result 660 states and 1123 transitions. [2021-11-07 02:00:38,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:00:38,431 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 02:00:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:38,445 INFO L225 Difference]: With dead ends: 660 [2021-11-07 02:00:38,445 INFO L226 Difference]: Without dead ends: 385 [2021-11-07 02:00:38,449 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 80 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 02:00:38,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-07 02:00:38,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2021-11-07 02:00:38,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 383 states have (on average 1.7493472584856398) internal successors, (670), 384 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:38,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 670 transitions. [2021-11-07 02:00:38,518 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 670 transitions. Word has length 41 [2021-11-07 02:00:38,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:38,519 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 670 transitions. [2021-11-07 02:00:38,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:38,519 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 670 transitions. [2021-11-07 02:00:38,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 02:00:38,527 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:38,527 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:00:38,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:38,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:38,729 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:38,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:38,730 INFO L85 PathProgramCache]: Analyzing trace with hash 935401701, now seen corresponding path program 1 times [2021-11-07 02:00:38,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:38,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122777342] [2021-11-07 02:00:38,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:38,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:38,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:38,735 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:38,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:00:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:39,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:00:39,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:39,347 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 02:00:39,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:39,520 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 02:00:39,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:39,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122777342] [2021-11-07 02:00:39,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122777342] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:39,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:39,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:00:39,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154173598] [2021-11-07 02:00:39,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:00:39,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:39,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:00:39,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:00:39,530 INFO L87 Difference]: Start difference. First operand 385 states and 670 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:39,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:39,672 INFO L93 Difference]: Finished difference Result 1125 states and 1962 transitions. [2021-11-07 02:00:39,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:00:39,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-07 02:00:39,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:39,683 INFO L225 Difference]: With dead ends: 1125 [2021-11-07 02:00:39,683 INFO L226 Difference]: Without dead ends: 755 [2021-11-07 02:00:39,690 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:00:39,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-11-07 02:00:39,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 384. [2021-11-07 02:00:39,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 382 states have (on average 1.7408376963350785) internal successors, (665), 383 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:39,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 665 transitions. [2021-11-07 02:00:39,767 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 665 transitions. Word has length 42 [2021-11-07 02:00:39,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:39,768 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 665 transitions. [2021-11-07 02:00:39,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:39,769 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 665 transitions. [2021-11-07 02:00:39,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:00:39,786 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:39,786 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] [2021-11-07 02:00:39,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:40,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:40,002 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:40,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:40,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1139727423, now seen corresponding path program 1 times [2021-11-07 02:00:40,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:40,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660167142] [2021-11-07 02:00:40,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:40,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:40,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:40,009 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:40,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:00:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:40,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:00:40,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:40,633 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 02:00:40,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:40,810 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 02:00:40,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:40,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660167142] [2021-11-07 02:00:40,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660167142] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:40,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:40,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:00:40,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655213282] [2021-11-07 02:00:40,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:00:40,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:40,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:00:40,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:00:40,814 INFO L87 Difference]: Start difference. First operand 384 states and 665 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:41,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:41,121 INFO L93 Difference]: Finished difference Result 1453 states and 2522 transitions. [2021-11-07 02:00:41,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:00:41,122 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 02:00:41,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:41,134 INFO L225 Difference]: With dead ends: 1453 [2021-11-07 02:00:41,134 INFO L226 Difference]: Without dead ends: 1087 [2021-11-07 02:00:41,136 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 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 02:00:41,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-11-07 02:00:41,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 383. [2021-11-07 02:00:41,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 381 states have (on average 1.7349081364829397) internal successors, (661), 382 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:41,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 661 transitions. [2021-11-07 02:00:41,201 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 661 transitions. Word has length 44 [2021-11-07 02:00:41,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:41,201 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 661 transitions. [2021-11-07 02:00:41,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:41,203 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 661 transitions. [2021-11-07 02:00:41,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 02:00:41,204 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:41,205 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:00:41,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:41,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:41,424 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:41,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:41,425 INFO L85 PathProgramCache]: Analyzing trace with hash 2033694732, now seen corresponding path program 1 times [2021-11-07 02:00:41,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:41,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959247606] [2021-11-07 02:00:41,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:41,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:41,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:41,428 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:41,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:00:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:41,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:00:41,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:42,018 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 02:00:42,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:42,147 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 02:00:42,147 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:42,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959247606] [2021-11-07 02:00:42,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959247606] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:42,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:42,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:00:42,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067957708] [2021-11-07 02:00:42,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:00:42,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:42,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:00:42,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:00:42,150 INFO L87 Difference]: Start difference. First operand 383 states and 661 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:42,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:42,219 INFO L93 Difference]: Finished difference Result 763 states and 1319 transitions. [2021-11-07 02:00:42,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:00:42,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 02:00:42,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:42,223 INFO L225 Difference]: With dead ends: 763 [2021-11-07 02:00:42,223 INFO L226 Difference]: Without dead ends: 388 [2021-11-07 02:00:42,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:00:42,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-07 02:00:42,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 383. [2021-11-07 02:00:42,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 381 states have (on average 1.727034120734908) internal successors, (658), 382 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:42,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 658 transitions. [2021-11-07 02:00:42,250 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 658 transitions. Word has length 45 [2021-11-07 02:00:42,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:42,251 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 658 transitions. [2021-11-07 02:00:42,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:42,252 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 658 transitions. [2021-11-07 02:00:42,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 02:00:42,253 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:42,253 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] [2021-11-07 02:00:42,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:42,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:42,467 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:42,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:42,469 INFO L85 PathProgramCache]: Analyzing trace with hash 99112535, now seen corresponding path program 1 times [2021-11-07 02:00:42,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:42,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775173959] [2021-11-07 02:00:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:42,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:42,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:42,471 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:42,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:00:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:42,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:00:42,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:43,025 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 02:00:43,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:43,162 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:43,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775173959] [2021-11-07 02:00:43,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775173959] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:43,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:43,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:00:43,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211851613] [2021-11-07 02:00:43,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:00:43,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:43,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:00:43,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:00:43,165 INFO L87 Difference]: Start difference. First operand 383 states and 658 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:43,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:43,389 INFO L93 Difference]: Finished difference Result 1440 states and 2498 transitions. [2021-11-07 02:00:43,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:00:43,390 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 46 [2021-11-07 02:00:43,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:43,398 INFO L225 Difference]: With dead ends: 1440 [2021-11-07 02:00:43,398 INFO L226 Difference]: Without dead ends: 1083 [2021-11-07 02:00:43,399 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 86 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 02:00:43,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-11-07 02:00:43,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 383. [2021-11-07 02:00:43,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 381 states have (on average 1.7191601049868765) internal successors, (655), 382 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:43,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 655 transitions. [2021-11-07 02:00:43,438 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 655 transitions. Word has length 46 [2021-11-07 02:00:43,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:43,438 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 655 transitions. [2021-11-07 02:00:43,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:43,439 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 655 transitions. [2021-11-07 02:00:43,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 02:00:43,440 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:43,440 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 02:00:43,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:43,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:43,654 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:43,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:43,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1995610556, now seen corresponding path program 1 times [2021-11-07 02:00:43,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:43,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040975009] [2021-11-07 02:00:43,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:43,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:43,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:43,657 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:43,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:00:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:44,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:00:44,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:44,280 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 02:00:44,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:44,410 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 02:00:44,410 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:44,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040975009] [2021-11-07 02:00:44,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040975009] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:44,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:44,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:00:44,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433117840] [2021-11-07 02:00:44,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:00:44,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:44,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:00:44,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:00:44,413 INFO L87 Difference]: Start difference. First operand 383 states and 655 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:44,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:44,495 INFO L93 Difference]: Finished difference Result 883 states and 1512 transitions. [2021-11-07 02:00:44,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:00:44,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 02:00:44,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:44,502 INFO L225 Difference]: With dead ends: 883 [2021-11-07 02:00:44,502 INFO L226 Difference]: Without dead ends: 740 [2021-11-07 02:00:44,503 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 02:00:44,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-11-07 02:00:44,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 597. [2021-11-07 02:00:44,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 595 states have (on average 1.757983193277311) internal successors, (1046), 596 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:44,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1046 transitions. [2021-11-07 02:00:44,581 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1046 transitions. Word has length 48 [2021-11-07 02:00:44,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:44,582 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 1046 transitions. [2021-11-07 02:00:44,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:44,584 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1046 transitions. [2021-11-07 02:00:44,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:00:44,586 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:44,587 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:00:44,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:44,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:44,805 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:44,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:44,805 INFO L85 PathProgramCache]: Analyzing trace with hash 776404619, now seen corresponding path program 1 times [2021-11-07 02:00:44,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:44,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086957766] [2021-11-07 02:00:44,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:44,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:44,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:44,808 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:44,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:00:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:45,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:00:45,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:45,404 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 02:00:45,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:45,578 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 02:00:45,578 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:45,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086957766] [2021-11-07 02:00:45,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086957766] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:45,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:45,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:00:45,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138101376] [2021-11-07 02:00:45,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:00:45,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:45,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:00:45,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:00:45,581 INFO L87 Difference]: Start difference. First operand 597 states and 1046 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:45,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:45,690 INFO L93 Difference]: Finished difference Result 1415 states and 2486 transitions. [2021-11-07 02:00:45,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:00:45,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 02:00:45,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:45,696 INFO L225 Difference]: With dead ends: 1415 [2021-11-07 02:00:45,697 INFO L226 Difference]: Without dead ends: 902 [2021-11-07 02:00:45,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:00:45,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2021-11-07 02:00:45,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 759. [2021-11-07 02:00:45,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 757 states have (on average 1.7701453104359313) internal successors, (1340), 758 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:45,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1340 transitions. [2021-11-07 02:00:45,765 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1340 transitions. Word has length 60 [2021-11-07 02:00:45,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:45,766 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 1340 transitions. [2021-11-07 02:00:45,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:45,767 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1340 transitions. [2021-11-07 02:00:45,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:00:45,768 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:45,768 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:00:45,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:45,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:45,983 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:45,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:45,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1597015820, now seen corresponding path program 1 times [2021-11-07 02:00:45,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:45,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709132822] [2021-11-07 02:00:45,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:45,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:45,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:45,985 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:45,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:00:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:46,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:00:46,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:46,538 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 02:00:46,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:46,706 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 02:00:46,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:46,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709132822] [2021-11-07 02:00:46,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709132822] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:46,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:46,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:00:46,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371185169] [2021-11-07 02:00:46,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:00:46,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:46,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:00:46,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:00:46,709 INFO L87 Difference]: Start difference. First operand 759 states and 1340 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:46,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:46,802 INFO L93 Difference]: Finished difference Result 1945 states and 3454 transitions. [2021-11-07 02:00:46,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:00:46,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 02:00:46,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:46,811 INFO L225 Difference]: With dead ends: 1945 [2021-11-07 02:00:46,811 INFO L226 Difference]: Without dead ends: 1274 [2021-11-07 02:00:46,813 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:00:46,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-11-07 02:00:46,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1131. [2021-11-07 02:00:46,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1129 states have (on average 1.787422497785651) internal successors, (2018), 1130 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:46,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 2018 transitions. [2021-11-07 02:00:46,921 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 2018 transitions. Word has length 61 [2021-11-07 02:00:46,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:46,922 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 2018 transitions. [2021-11-07 02:00:46,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:46,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 2018 transitions. [2021-11-07 02:00:46,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 02:00:46,925 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:46,926 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] [2021-11-07 02:00:46,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:47,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:47,142 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:47,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:47,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1569677220, now seen corresponding path program 1 times [2021-11-07 02:00:47,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:47,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382469664] [2021-11-07 02:00:47,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:47,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:47,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:47,144 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:47,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:00:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:47,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:00:47,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:47,900 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 02:00:47,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:48,062 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 02:00:48,063 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:48,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382469664] [2021-11-07 02:00:48,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382469664] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:48,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:48,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:00:48,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143247961] [2021-11-07 02:00:48,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:00:48,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:48,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:00:48,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:00:48,065 INFO L87 Difference]: Start difference. First operand 1131 states and 2018 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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 02:00:48,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:48,205 INFO L93 Difference]: Finished difference Result 2159 states and 3842 transitions. [2021-11-07 02:00:48,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:00:48,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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 62 [2021-11-07 02:00:48,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:48,214 INFO L225 Difference]: With dead ends: 2159 [2021-11-07 02:00:48,214 INFO L226 Difference]: Without dead ends: 1274 [2021-11-07 02:00:48,216 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 120 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 02:00:48,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-11-07 02:00:48,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1131. [2021-11-07 02:00:48,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1129 states have (on average 1.7856510186005314) internal successors, (2016), 1130 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:48,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 2016 transitions. [2021-11-07 02:00:48,299 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 2016 transitions. Word has length 62 [2021-11-07 02:00:48,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:48,300 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 2016 transitions. [2021-11-07 02:00:48,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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 02:00:48,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 2016 transitions. [2021-11-07 02:00:48,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 02:00:48,303 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:48,303 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:00:48,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:48,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:48,518 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:48,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:48,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1519612189, now seen corresponding path program 1 times [2021-11-07 02:00:48,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:48,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897609310] [2021-11-07 02:00:48,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:48,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:48,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:48,520 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:48,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:00:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:49,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:00:49,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:49,185 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 02:00:49,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:49,350 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:49,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897609310] [2021-11-07 02:00:49,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897609310] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:49,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:49,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:00:49,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341959914] [2021-11-07 02:00:49,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:00:49,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:49,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:00:49,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:00:49,353 INFO L87 Difference]: Start difference. First operand 1131 states and 2016 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:49,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:49,519 INFO L93 Difference]: Finished difference Result 3033 states and 5437 transitions. [2021-11-07 02:00:49,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:00:49,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 02:00:49,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:49,532 INFO L225 Difference]: With dead ends: 3033 [2021-11-07 02:00:49,532 INFO L226 Difference]: Without dead ends: 1998 [2021-11-07 02:00:49,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:00:49,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-11-07 02:00:49,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1855. [2021-11-07 02:00:49,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1853 states have (on average 1.799784133837021) internal successors, (3335), 1854 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:49,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 3335 transitions. [2021-11-07 02:00:49,671 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 3335 transitions. Word has length 62 [2021-11-07 02:00:49,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:49,672 INFO L470 AbstractCegarLoop]: Abstraction has 1855 states and 3335 transitions. [2021-11-07 02:00:49,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:49,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 3335 transitions. [2021-11-07 02:00:49,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:00:49,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:49,676 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:00:49,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:49,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:49,890 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:49,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:49,891 INFO L85 PathProgramCache]: Analyzing trace with hash 887295882, now seen corresponding path program 1 times [2021-11-07 02:00:49,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:49,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704743030] [2021-11-07 02:00:49,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:49,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:49,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:49,892 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:49,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:00:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:50,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:00:50,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:50,501 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 02:00:50,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:50,633 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 02:00:50,633 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:50,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704743030] [2021-11-07 02:00:50,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704743030] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:50,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:50,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:00:50,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434909883] [2021-11-07 02:00:50,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:00:50,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:50,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:00:50,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:00:50,635 INFO L87 Difference]: Start difference. First operand 1855 states and 3335 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:50,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:50,835 INFO L93 Difference]: Finished difference Result 4941 states and 8913 transitions. [2021-11-07 02:00:50,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:00:50,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 02:00:50,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:50,856 INFO L225 Difference]: With dead ends: 4941 [2021-11-07 02:00:50,856 INFO L226 Difference]: Without dead ends: 3216 [2021-11-07 02:00:50,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:00:50,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3216 states. [2021-11-07 02:00:51,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3216 to 3073. [2021-11-07 02:00:51,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3073 states, 3071 states have (on average 1.8065776619993488) internal successors, (5548), 3072 states have internal predecessors, (5548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:51,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3073 states to 3073 states and 5548 transitions. [2021-11-07 02:00:51,099 INFO L78 Accepts]: Start accepts. Automaton has 3073 states and 5548 transitions. Word has length 63 [2021-11-07 02:00:51,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:51,100 INFO L470 AbstractCegarLoop]: Abstraction has 3073 states and 5548 transitions. [2021-11-07 02:00:51,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:51,101 INFO L276 IsEmpty]: Start isEmpty. Operand 3073 states and 5548 transitions. [2021-11-07 02:00:51,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:00:51,111 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:51,112 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:00:51,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:51,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:51,325 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:51,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:51,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1846185428, now seen corresponding path program 1 times [2021-11-07 02:00:51,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:51,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16972297] [2021-11-07 02:00:51,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:51,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:51,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:51,329 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:51,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:00:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:51,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:00:51,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:52,155 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 02:00:52,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:52,322 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 02:00:52,322 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:52,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16972297] [2021-11-07 02:00:52,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16972297] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:52,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:52,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:00:52,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112418267] [2021-11-07 02:00:52,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:00:52,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:52,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:00:52,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:00:52,326 INFO L87 Difference]: Start difference. First operand 3073 states and 5548 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:52,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:52,733 INFO L93 Difference]: Finished difference Result 8311 states and 15035 transitions. [2021-11-07 02:00:52,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:00:52,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 02:00:52,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:52,766 INFO L225 Difference]: With dead ends: 8311 [2021-11-07 02:00:52,766 INFO L226 Difference]: Without dead ends: 5402 [2021-11-07 02:00:52,771 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:00:52,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5402 states. [2021-11-07 02:00:53,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5402 to 5259. [2021-11-07 02:00:53,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5259 states, 5257 states have (on average 1.8088263268023588) internal successors, (9509), 5258 states have internal predecessors, (9509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:53,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5259 states to 5259 states and 9509 transitions. [2021-11-07 02:00:53,168 INFO L78 Accepts]: Start accepts. Automaton has 5259 states and 9509 transitions. Word has length 64 [2021-11-07 02:00:53,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:53,168 INFO L470 AbstractCegarLoop]: Abstraction has 5259 states and 9509 transitions. [2021-11-07 02:00:53,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:53,169 INFO L276 IsEmpty]: Start isEmpty. Operand 5259 states and 9509 transitions. [2021-11-07 02:00:53,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:00:53,173 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:53,173 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:00:53,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:53,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:53,388 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:53,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:53,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2102746232, now seen corresponding path program 1 times [2021-11-07 02:00:53,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:53,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1934871463] [2021-11-07 02:00:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:53,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:53,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:53,391 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:53,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:00:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:53,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:00:53,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:54,113 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 02:00:54,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:54,291 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 02:00:54,291 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:54,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1934871463] [2021-11-07 02:00:54,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1934871463] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:54,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:54,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:00:54,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556987241] [2021-11-07 02:00:54,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:00:54,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:54,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:00:54,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:00:54,293 INFO L87 Difference]: Start difference. First operand 5259 states and 9509 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:57,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:57,586 INFO L93 Difference]: Finished difference Result 19676 states and 35617 transitions. [2021-11-07 02:00:57,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:00:57,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 02:00:57,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:57,664 INFO L225 Difference]: With dead ends: 19676 [2021-11-07 02:00:57,664 INFO L226 Difference]: Without dead ends: 14661 [2021-11-07 02:00:57,672 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 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 02:00:57,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14661 states. [2021-11-07 02:00:58,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14661 to 5209. [2021-11-07 02:00:58,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5209 states, 5207 states have (on average 1.7877856731323218) internal successors, (9309), 5208 states have internal predecessors, (9309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5209 states to 5209 states and 9309 transitions. [2021-11-07 02:00:58,146 INFO L78 Accepts]: Start accepts. Automaton has 5209 states and 9309 transitions. Word has length 65 [2021-11-07 02:00:58,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:58,147 INFO L470 AbstractCegarLoop]: Abstraction has 5209 states and 9309 transitions. [2021-11-07 02:00:58,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:58,147 INFO L276 IsEmpty]: Start isEmpty. Operand 5209 states and 9309 transitions. [2021-11-07 02:00:58,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:00:58,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:58,151 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:00:58,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:58,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:58,366 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:58,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:58,366 INFO L85 PathProgramCache]: Analyzing trace with hash -552069511, now seen corresponding path program 1 times [2021-11-07 02:00:58,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:58,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963559692] [2021-11-07 02:00:58,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:58,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:58,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:58,368 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:58,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:00:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:58,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:00:58,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:59,092 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 02:00:59,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:59,324 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 02:00:59,324 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:59,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963559692] [2021-11-07 02:00:59,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963559692] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:59,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:59,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:00:59,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40192052] [2021-11-07 02:00:59,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:00:59,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:59,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:00:59,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:00:59,327 INFO L87 Difference]: Start difference. First operand 5209 states and 9309 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:59,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:59,951 INFO L93 Difference]: Finished difference Result 15048 states and 26941 transitions. [2021-11-07 02:00:59,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:00:59,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 02:00:59,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:59,983 INFO L225 Difference]: With dead ends: 15048 [2021-11-07 02:00:59,983 INFO L226 Difference]: Without dead ends: 10010 [2021-11-07 02:00:59,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:00,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10010 states. [2021-11-07 02:01:00,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10010 to 9867. [2021-11-07 02:01:00,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9867 states, 9865 states have (on average 1.788748099341105) internal successors, (17646), 9866 states have internal predecessors, (17646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9867 states to 9867 states and 17646 transitions. [2021-11-07 02:01:00,757 INFO L78 Accepts]: Start accepts. Automaton has 9867 states and 17646 transitions. Word has length 65 [2021-11-07 02:01:00,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:00,758 INFO L470 AbstractCegarLoop]: Abstraction has 9867 states and 17646 transitions. [2021-11-07 02:01:00,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:00,759 INFO L276 IsEmpty]: Start isEmpty. Operand 9867 states and 17646 transitions. [2021-11-07 02:01:00,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:01:00,766 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:00,767 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:00,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:00,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:00,986 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:00,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:00,986 INFO L85 PathProgramCache]: Analyzing trace with hash -325631763, now seen corresponding path program 1 times [2021-11-07 02:01:00,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:00,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094973237] [2021-11-07 02:01:00,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:00,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:00,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:00,988 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:01,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:01:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:01,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:01:01,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:01,894 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 02:01:01,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:02,097 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 02:01:02,098 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:02,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094973237] [2021-11-07 02:01:02,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094973237] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:01:02,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [268995208] [2021-11-07 02:01:02,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:02,098 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:02,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:01:02,100 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:01:02,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 02:01:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:02,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:01:02,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:03,166 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 02:01:03,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:03,398 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 02:01:03,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [268995208] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:03,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:01:03,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 02:01:03,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263121261] [2021-11-07 02:01:03,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:03,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:03,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:03,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:01:03,401 INFO L87 Difference]: Start difference. First operand 9867 states and 17646 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:04,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:04,124 INFO L93 Difference]: Finished difference Result 9968 states and 17808 transitions. [2021-11-07 02:01:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:04,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 02:01:04,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:04,159 INFO L225 Difference]: With dead ends: 9968 [2021-11-07 02:01:04,159 INFO L226 Difference]: Without dead ends: 9861 [2021-11-07 02:01:04,164 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:01:04,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9861 states. [2021-11-07 02:01:04,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9861 to 9861. [2021-11-07 02:01:04,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9861 states, 9860 states have (on average 1.7887423935091278) internal successors, (17637), 9860 states have internal predecessors, (17637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:04,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9861 states to 9861 states and 17637 transitions. [2021-11-07 02:01:04,798 INFO L78 Accepts]: Start accepts. Automaton has 9861 states and 17637 transitions. Word has length 66 [2021-11-07 02:01:04,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:04,799 INFO L470 AbstractCegarLoop]: Abstraction has 9861 states and 17637 transitions. [2021-11-07 02:01:04,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:04,799 INFO L276 IsEmpty]: Start isEmpty. Operand 9861 states and 17637 transitions. [2021-11-07 02:01:04,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 02:01:04,823 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:04,823 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] [2021-11-07 02:01:04,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 02:01:05,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:05,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:05,260 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:05,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:05,260 INFO L85 PathProgramCache]: Analyzing trace with hash 395041395, now seen corresponding path program 1 times [2021-11-07 02:01:05,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:05,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776855687] [2021-11-07 02:01:05,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:05,261 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:05,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:05,262 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:05,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:01:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:06,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:01:06,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:06,255 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 02:01:06,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:06,560 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 02:01:06,560 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:06,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776855687] [2021-11-07 02:01:06,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776855687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:01:06,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [723679201] [2021-11-07 02:01:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:06,561 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:06,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:01:06,567 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:01:06,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 02:01:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:07,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:01:07,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:08,242 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 02:01:08,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:08,806 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 02:01:08,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [723679201] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:08,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:01:08,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 02:01:08,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514113778] [2021-11-07 02:01:08,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:01:08,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:08,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:01:08,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:01:08,813 INFO L87 Difference]: Start difference. First operand 9861 states and 17637 transitions. Second operand has 16 states, 16 states have (on average 8.6875) internal successors, (139), 15 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:26,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:26,146 INFO L93 Difference]: Finished difference Result 20901 states and 37091 transitions. [2021-11-07 02:01:26,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 02:01:26,147 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.6875) internal successors, (139), 15 states have internal predecessors, (139), 0 states have call successors, (0), 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 97 [2021-11-07 02:01:26,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:26,211 INFO L225 Difference]: With dead ends: 20901 [2021-11-07 02:01:26,212 INFO L226 Difference]: Without dead ends: 20784 [2021-11-07 02:01:26,221 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 02:01:26,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20784 states. [2021-11-07 02:01:27,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20784 to 19594. [2021-11-07 02:01:27,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19594 states, 19593 states have (on average 1.7897208186597253) internal successors, (35066), 19593 states have internal predecessors, (35066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:27,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19594 states to 19594 states and 35066 transitions. [2021-11-07 02:01:27,467 INFO L78 Accepts]: Start accepts. Automaton has 19594 states and 35066 transitions. Word has length 97 [2021-11-07 02:01:27,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:27,468 INFO L470 AbstractCegarLoop]: Abstraction has 19594 states and 35066 transitions. [2021-11-07 02:01:27,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.6875) internal successors, (139), 15 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:27,468 INFO L276 IsEmpty]: Start isEmpty. Operand 19594 states and 35066 transitions. [2021-11-07 02:01:27,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 02:01:27,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:27,510 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] [2021-11-07 02:01:27,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:27,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 02:01:27,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:27,916 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:27,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:27,917 INFO L85 PathProgramCache]: Analyzing trace with hash -534947137, now seen corresponding path program 1 times [2021-11-07 02:01:27,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:27,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687982113] [2021-11-07 02:01:27,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:27,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:27,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:27,919 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:27,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:01:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:28,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:01:28,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:29,151 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 02:01:29,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:29,443 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 02:01:29,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:29,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687982113] [2021-11-07 02:01:29,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687982113] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:01:29,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [712027551] [2021-11-07 02:01:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:29,444 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:29,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:01:29,445 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:01:29,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 02:01:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:30,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:01:30,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:30,675 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 02:01:30,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:30,846 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 02:01:30,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [712027551] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:30,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:01:30,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 02:01:30,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979018033] [2021-11-07 02:01:30,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:01:30,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:30,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:01:30,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:01:30,848 INFO L87 Difference]: Start difference. First operand 19594 states and 35066 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:31,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:31,530 INFO L93 Difference]: Finished difference Result 19854 states and 35473 transitions. [2021-11-07 02:01:31,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:01:31,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 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 98 [2021-11-07 02:01:31,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:31,567 INFO L225 Difference]: With dead ends: 19854 [2021-11-07 02:01:31,567 INFO L226 Difference]: Without dead ends: 19621 [2021-11-07 02:01:31,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:01:31,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19621 states. [2021-11-07 02:01:32,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19621 to 19525. [2021-11-07 02:01:32,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19525 states, 19524 states have (on average 1.7899508297480025) internal successors, (34947), 19524 states have internal predecessors, (34947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:32,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19525 states to 19525 states and 34947 transitions. [2021-11-07 02:01:32,818 INFO L78 Accepts]: Start accepts. Automaton has 19525 states and 34947 transitions. Word has length 98 [2021-11-07 02:01:32,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:32,818 INFO L470 AbstractCegarLoop]: Abstraction has 19525 states and 34947 transitions. [2021-11-07 02:01:32,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:32,819 INFO L276 IsEmpty]: Start isEmpty. Operand 19525 states and 34947 transitions. [2021-11-07 02:01:32,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 02:01:32,855 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:32,856 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] [2021-11-07 02:01:32,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:33,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:01:33,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:01:33,262 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:33,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:33,263 INFO L85 PathProgramCache]: Analyzing trace with hash 2064431701, now seen corresponding path program 1 times [2021-11-07 02:01:33,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:01:33,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797605497] [2021-11-07 02:01:33,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:33,263 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:01:33,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:01:33,265 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:01:33,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:01:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:34,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:01:34,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:34,447 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 02:01:34,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:34,752 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 02:01:34,752 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:01:34,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797605497] [2021-11-07 02:01:34,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797605497] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:01:34,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1822233735] [2021-11-07 02:01:34,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:34,753 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:34,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:01:34,768 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:01:34,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 02:01:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:36,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:01:36,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:01:36,805 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 02:01:36,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:01:37,283 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 02:01:37,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1822233735] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:37,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:01:37,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 02:01:37,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563180311] [2021-11-07 02:01:37,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:01:37,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:01:37,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:01:37,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:01:37,286 INFO L87 Difference]: Start difference. First operand 19525 states and 34947 transitions. Second operand has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:58,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:58,438 INFO L93 Difference]: Finished difference Result 40586 states and 72219 transitions. [2021-11-07 02:01:58,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 02:01:58,439 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 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 99 [2021-11-07 02:01:58,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:58,503 INFO L225 Difference]: With dead ends: 40586 [2021-11-07 02:01:58,503 INFO L226 Difference]: Without dead ends: 40382 [2021-11-07 02:01:58,512 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=501, Invalid=1479, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 02:01:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40382 states. [2021-11-07 02:02:00,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40382 to 38774. [2021-11-07 02:02:00,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38774 states, 38773 states have (on average 1.7907306630902948) internal successors, (69432), 38773 states have internal predecessors, (69432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:00,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38774 states to 38774 states and 69432 transitions. [2021-11-07 02:02:00,398 INFO L78 Accepts]: Start accepts. Automaton has 38774 states and 69432 transitions. Word has length 99 [2021-11-07 02:02:00,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:00,398 INFO L470 AbstractCegarLoop]: Abstraction has 38774 states and 69432 transitions. [2021-11-07 02:02:00,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:00,398 INFO L276 IsEmpty]: Start isEmpty. Operand 38774 states and 69432 transitions. [2021-11-07 02:02:00,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 02:02:00,436 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:00,436 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] [2021-11-07 02:02:00,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:00,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:00,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:02:00,837 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:00,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:00,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1413899807, now seen corresponding path program 1 times [2021-11-07 02:02:00,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:00,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999165924] [2021-11-07 02:02:00,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:00,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:00,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:00,839 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:00,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 02:02:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:01,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:02:01,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:01,963 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 02:02:01,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:02,228 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 02:02:02,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:02,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999165924] [2021-11-07 02:02:02,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999165924] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:02:02,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [529954470] [2021-11-07 02:02:02,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:02,229 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:02:02,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:02:02,236 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:02:02,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 02:02:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:03,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:02:03,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:03,818 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 02:02:03,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:04,121 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 02:02:04,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [529954470] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:04,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:02:04,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-07 02:02:04,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262017114] [2021-11-07 02:02:04,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:02:04,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:04,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:02:04,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:02:04,124 INFO L87 Difference]: Start difference. First operand 38774 states and 69432 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 02:02:07,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:07,896 INFO L93 Difference]: Finished difference Result 39174 states and 70068 transitions. [2021-11-07 02:02:07,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:02:07,897 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 99 [2021-11-07 02:02:07,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:07,944 INFO L225 Difference]: With dead ends: 39174 [2021-11-07 02:02:07,944 INFO L226 Difference]: Without dead ends: 38768 [2021-11-07 02:02:07,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:02:07,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38768 states. [2021-11-07 02:02:09,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38768 to 38744. [2021-11-07 02:02:09,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38744 states, 38743 states have (on average 1.7904911855044783) internal successors, (69369), 38743 states have internal predecessors, (69369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:09,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38744 states to 38744 states and 69369 transitions. [2021-11-07 02:02:09,948 INFO L78 Accepts]: Start accepts. Automaton has 38744 states and 69369 transitions. Word has length 99 [2021-11-07 02:02:09,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:09,948 INFO L470 AbstractCegarLoop]: Abstraction has 38744 states and 69369 transitions. [2021-11-07 02:02:09,948 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 02:02:09,949 INFO L276 IsEmpty]: Start isEmpty. Operand 38744 states and 69369 transitions. [2021-11-07 02:02:09,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 02:02:09,993 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:09,993 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] [2021-11-07 02:02:10,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-07 02:02:10,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:10,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:02:10,412 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:10,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:10,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1335898615, now seen corresponding path program 1 times [2021-11-07 02:02:10,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:10,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435844489] [2021-11-07 02:02:10,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:10,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:10,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:10,415 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:10,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 02:02:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:11,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:02:11,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:11,661 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 02:02:11,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:11,934 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 02:02:11,934 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:11,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435844489] [2021-11-07 02:02:11,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435844489] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:02:11,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [439671507] [2021-11-07 02:02:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:11,936 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:02:11,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:02:11,937 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:02:11,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 02:02:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:13,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:02:13,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:13,966 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 02:02:13,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:14,429 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 02:02:14,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [439671507] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:14,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:02:14,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 02:02:14,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914992284] [2021-11-07 02:02:14,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:02:14,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:14,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:02:14,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:02:14,433 INFO L87 Difference]: Start difference. First operand 38744 states and 69369 transitions. Second operand has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:42,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:42,049 INFO L93 Difference]: Finished difference Result 80417 states and 143158 transitions. [2021-11-07 02:02:42,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 02:02:42,049 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 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 99 [2021-11-07 02:02:42,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:42,187 INFO L225 Difference]: With dead ends: 80417 [2021-11-07 02:02:42,187 INFO L226 Difference]: Without dead ends: 80039 [2021-11-07 02:02:42,204 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=501, Invalid=1479, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 02:02:42,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80039 states. [2021-11-07 02:02:46,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80039 to 77131. [2021-11-07 02:02:46,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77131 states, 77130 states have (on average 1.7908725528328795) internal successors, (138130), 77130 states have internal predecessors, (138130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:46,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77131 states to 77131 states and 138130 transitions. [2021-11-07 02:02:46,953 INFO L78 Accepts]: Start accepts. Automaton has 77131 states and 138130 transitions. Word has length 99 [2021-11-07 02:02:46,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:46,954 INFO L470 AbstractCegarLoop]: Abstraction has 77131 states and 138130 transitions. [2021-11-07 02:02:46,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:46,954 INFO L276 IsEmpty]: Start isEmpty. Operand 77131 states and 138130 transitions. [2021-11-07 02:02:47,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 02:02:47,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:47,071 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] [2021-11-07 02:02:47,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:47,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-07 02:02:47,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:47,484 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:47,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:47,485 INFO L85 PathProgramCache]: Analyzing trace with hash -442412277, now seen corresponding path program 1 times [2021-11-07 02:02:47,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:47,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516279753] [2021-11-07 02:02:47,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:47,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:47,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:47,487 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:47,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 02:02:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:48,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:02:48,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:49,240 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 02:02:49,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:49,569 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 02:02:49,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:49,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516279753] [2021-11-07 02:02:49,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516279753] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:02:49,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1868931192] [2021-11-07 02:02:49,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:49,570 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:02:49,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:02:49,572 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:02:49,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 02:02:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:51,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:02:51,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:51,514 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 02:02:51,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:51,879 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 02:02:51,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1868931192] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:51,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:02:51,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 02:02:51,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083058734] [2021-11-07 02:02:51,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:02:51,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:51,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:02:51,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:02:51,882 INFO L87 Difference]: Start difference. First operand 77131 states and 138130 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 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 02:02:57,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:57,130 INFO L93 Difference]: Finished difference Result 80656 states and 143626 transitions. [2021-11-07 02:02:57,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:02:57,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 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 99 [2021-11-07 02:02:57,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:57,298 INFO L225 Difference]: With dead ends: 80656 [2021-11-07 02:02:57,299 INFO L226 Difference]: Without dead ends: 78686 [2021-11-07 02:02:57,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:02:57,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78686 states. [2021-11-07 02:03:02,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78686 to 77243. [2021-11-07 02:03:02,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77243 states, 77242 states have (on average 1.7903472204241215) internal successors, (138290), 77242 states have internal predecessors, (138290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:02,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77243 states to 77243 states and 138290 transitions. [2021-11-07 02:03:02,265 INFO L78 Accepts]: Start accepts. Automaton has 77243 states and 138290 transitions. Word has length 99 [2021-11-07 02:03:02,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:02,265 INFO L470 AbstractCegarLoop]: Abstraction has 77243 states and 138290 transitions. [2021-11-07 02:03:02,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 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 02:03:02,265 INFO L276 IsEmpty]: Start isEmpty. Operand 77243 states and 138290 transitions. [2021-11-07 02:03:02,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 02:03:02,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:02,639 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] [2021-11-07 02:03:02,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:02,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-11-07 02:03:03,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:03:03,046 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:03:03,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:03,046 INFO L85 PathProgramCache]: Analyzing trace with hash 548455549, now seen corresponding path program 1 times [2021-11-07 02:03:03,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:03,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091269806] [2021-11-07 02:03:03,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:03,048 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:03,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:03,049 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:03,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 02:03:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:04,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:03:04,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:04,845 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 02:03:04,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:05,179 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 02:03:05,179 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:05,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091269806] [2021-11-07 02:03:05,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091269806] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:03:05,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [507671447] [2021-11-07 02:03:05,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:05,180 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:03:05,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:03:05,181 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:03:05,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7c63722-9e38-4a43-8308-f92c45de0474/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 02:03:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:07,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 02:03:07,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:07,643 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 02:03:07,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:07,924 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 02:03:07,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [507671447] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:07,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:03:07,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 02:03:07,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997650256] [2021-11-07 02:03:07,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:03:07,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:07,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:03:07,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:03:07,927 INFO L87 Difference]: Start difference. First operand 77243 states and 138290 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:11,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:11,720 INFO L93 Difference]: Finished difference Result 78235 states and 139836 transitions. [2021-11-07 02:03:11,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:03:11,723 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 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 100 [2021-11-07 02:03:11,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:11,853 INFO L225 Difference]: With dead ends: 78235 [2021-11-07 02:03:11,853 INFO L226 Difference]: Without dead ends: 77558 [2021-11-07 02:03:11,869 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:03:12,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77558 states.