./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec27_product29.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_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/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_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/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_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/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 f1b2e6fc3090957bb44fbf381fe29c5adbd1106bdb77e2b6b77c5e6e962ffc5b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:03:35,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:03:35,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:03:35,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:03:35,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:03:35,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:03:35,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:03:35,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:03:35,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:03:35,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:03:35,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:03:35,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:03:35,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:03:35,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:03:35,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:03:35,168 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:03:35,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:03:35,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:03:35,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:03:35,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:03:35,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:03:35,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:03:35,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:03:35,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:03:35,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:03:35,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:03:35,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:03:35,211 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:03:35,212 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:03:35,214 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:03:35,216 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:03:35,217 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:03:35,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:03:35,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:03:35,224 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:03:35,225 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:03:35,226 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:03:35,226 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:03:35,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:03:35,228 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:03:35,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:03:35,230 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:03:35,289 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:03:35,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:03:35,292 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:03:35,292 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:03:35,292 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:03:35,293 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:03:35,293 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:03:35,293 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:03:35,302 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:03:35,302 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:03:35,304 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:03:35,304 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:03:35,304 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:03:35,305 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:03:35,305 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:03:35,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:03:35,307 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:03:35,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:03:35,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:03:35,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:03:35,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:03:35,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:03:35,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:03:35,309 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:03:35,309 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:03:35,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:03:35,310 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:03:35,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:03:35,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:03:35,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:03:35,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:03:35,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:03:35,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:03:35,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:03:35,314 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:03:35,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:03:35,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:03:35,315 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:03:35,316 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:03:35,316 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_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1b2e6fc3090957bb44fbf381fe29c5adbd1106bdb77e2b6b77c5e6e962ffc5b [2021-11-07 01:03:35,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:03:35,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:03:35,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:03:35,693 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:03:35,694 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:03:35,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec27_product29.cil.c [2021-11-07 01:03:35,796 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/data/23ab5eda6/0aa7c4b17f614017a817f51ecc611b93/FLAGe9278ade6 [2021-11-07 01:03:36,566 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:03:36,567 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/sv-benchmarks/c/product-lines/email_spec27_product29.cil.c [2021-11-07 01:03:36,603 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/data/23ab5eda6/0aa7c4b17f614017a817f51ecc611b93/FLAGe9278ade6 [2021-11-07 01:03:36,691 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/data/23ab5eda6/0aa7c4b17f614017a817f51ecc611b93 [2021-11-07 01:03:36,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:03:36,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:03:36,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:03:36,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:03:36,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:03:36,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:03:36" (1/1) ... [2021-11-07 01:03:36,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ebe83b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:36, skipping insertion in model container [2021-11-07 01:03:36,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:03:36" (1/1) ... [2021-11-07 01:03:36,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:03:36,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:03:37,356 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_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/sv-benchmarks/c/product-lines/email_spec27_product29.cil.c[37973,37986] [2021-11-07 01:03:37,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:03:37,701 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:03:37,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2a47c91d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:37, skipping insertion in model container [2021-11-07 01:03:37,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:03:37,705 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:03:37,708 INFO L168 Benchmark]: Toolchain (without parser) took 1011.36 ms. Allocated memory is still 96.5 MB. Free memory was 59.1 MB in the beginning and 60.7 MB in the end (delta: -1.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:03:37,710 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 96.5 MB. Free memory was 67.0 MB in the beginning and 67.0 MB in the end (delta: 30.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:03:37,712 INFO L168 Benchmark]: CACSL2BoogieTranslator took 997.45 ms. Allocated memory is still 96.5 MB. Free memory was 58.8 MB in the beginning and 60.7 MB in the end (delta: -1.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:03:37,715 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 96.5 MB. Free memory was 67.0 MB in the beginning and 67.0 MB in the end (delta: 30.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 997.45 ms. Allocated memory is still 96.5 MB. Free memory was 58.8 MB in the beginning and 60.7 MB in the end (delta: -1.8 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: 77]: 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_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/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_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/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_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/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 f1b2e6fc3090957bb44fbf381fe29c5adbd1106bdb77e2b6b77c5e6e962ffc5b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:03:40,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:03:40,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:03:40,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:03:40,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:03:40,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:03:40,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:03:40,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:03:40,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:03:40,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:03:40,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:03:40,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:03:40,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:03:40,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:03:40,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:03:40,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:03:40,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:03:40,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:03:40,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:03:40,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:03:40,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:03:40,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:03:40,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:03:40,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:03:40,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:03:40,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:03:40,589 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:03:40,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:03:40,593 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:03:40,595 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:03:40,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:03:40,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:03:40,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:03:40,603 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:03:40,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:03:40,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:03:40,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:03:40,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:03:40,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:03:40,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:03:40,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:03:40,613 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:03:40,669 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:03:40,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:03:40,672 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:03:40,672 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:03:40,672 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:03:40,673 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:03:40,673 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:03:40,673 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:03:40,674 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:03:40,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:03:40,677 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:03:40,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:03:40,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:03:40,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:03:40,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:03:40,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:03:40,679 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:03:40,679 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:03:40,679 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:03:40,680 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:03:40,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:03:40,680 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:03:40,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:03:40,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:03:40,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:03:40,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:03:40,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:03:40,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:03:40,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:03:40,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:03:40,683 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:03:40,683 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:03:40,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:03:40,684 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:03:40,685 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:03:40,685 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_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1b2e6fc3090957bb44fbf381fe29c5adbd1106bdb77e2b6b77c5e6e962ffc5b [2021-11-07 01:03:41,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:03:41,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:03:41,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:03:41,197 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:03:41,198 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:03:41,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec27_product29.cil.c [2021-11-07 01:03:41,296 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/data/63ec38f3f/9300dc8812e949e69978e5cbba76dbed/FLAG573a8b1aa [2021-11-07 01:03:42,166 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:03:42,169 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/sv-benchmarks/c/product-lines/email_spec27_product29.cil.c [2021-11-07 01:03:42,198 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/data/63ec38f3f/9300dc8812e949e69978e5cbba76dbed/FLAG573a8b1aa [2021-11-07 01:03:42,284 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/data/63ec38f3f/9300dc8812e949e69978e5cbba76dbed [2021-11-07 01:03:42,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:03:42,299 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:03:42,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:03:42,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:03:42,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:03:42,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:03:42" (1/1) ... [2021-11-07 01:03:42,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27241956 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:42, skipping insertion in model container [2021-11-07 01:03:42,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:03:42" (1/1) ... [2021-11-07 01:03:42,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:03:42,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:03:42,992 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_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/sv-benchmarks/c/product-lines/email_spec27_product29.cil.c[37973,37986] [2021-11-07 01:03:43,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:03:43,342 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:03:43,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:03:43,496 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_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/sv-benchmarks/c/product-lines/email_spec27_product29.cil.c[37973,37986] [2021-11-07 01:03:43,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:03:43,586 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:03:43,704 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_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/sv-benchmarks/c/product-lines/email_spec27_product29.cil.c[37973,37986] [2021-11-07 01:03:43,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:03:43,791 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:03:43,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:43 WrapperNode [2021-11-07 01:03:43,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:03:43,794 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:03:43,794 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:03:43,794 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:03:43,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:43" (1/1) ... [2021-11-07 01:03:43,869 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:43" (1/1) ... [2021-11-07 01:03:44,066 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:03:44,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:03:44,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:03:44,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:03:44,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:43" (1/1) ... [2021-11-07 01:03:44,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:43" (1/1) ... [2021-11-07 01:03:44,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:43" (1/1) ... [2021-11-07 01:03:44,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:43" (1/1) ... [2021-11-07 01:03:44,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:43" (1/1) ... [2021-11-07 01:03:44,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:43" (1/1) ... [2021-11-07 01:03:44,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:43" (1/1) ... [2021-11-07 01:03:44,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:03:44,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:03:44,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:03:44,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:03:44,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:43" (1/1) ... [2021-11-07 01:03:44,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:03:44,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:03:44,382 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:03:44,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:03:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:03:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:03:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:03:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:03:44,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:03:51,365 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:03:51,366 INFO L299 CfgBuilder]: Removed 617 assume(true) statements. [2021-11-07 01:03:51,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:03:51 BoogieIcfgContainer [2021-11-07 01:03:51,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:03:51,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:03:51,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:03:51,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:03:51,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:03:42" (1/3) ... [2021-11-07 01:03:51,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29da9cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:03:51, skipping insertion in model container [2021-11-07 01:03:51,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:03:43" (2/3) ... [2021-11-07 01:03:51,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29da9cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:03:51, skipping insertion in model container [2021-11-07 01:03:51,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:03:51" (3/3) ... [2021-11-07 01:03:51,385 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec27_product29.cil.c [2021-11-07 01:03:51,397 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:03:51,397 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:03:51,485 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:03:51,492 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:03:51,492 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:03:51,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 1058 states, 1051 states have (on average 1.7706945765937203) internal successors, (1861), 1057 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:51,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:03:51,570 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:51,571 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:51,572 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:03:51,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:51,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1105545927, now seen corresponding path program 1 times [2021-11-07 01:03:51,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:51,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169838931] [2021-11-07 01:03:51,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:51,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:51,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:51,610 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:51,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:03:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:52,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:03:52,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:52,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:52,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:52,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169838931] [2021-11-07 01:03:52,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169838931] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:52,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:52,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:03:52,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796057492] [2021-11-07 01:03:52,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:03:52,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:52,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:03:52,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:03:52,781 INFO L87 Difference]: Start difference. First operand has 1058 states, 1051 states have (on average 1.7706945765937203) internal successors, (1861), 1057 states have internal predecessors, (1861), 0 states have call successors, (0), 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 32.5) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:52,999 INFO L93 Difference]: Finished difference Result 1835 states and 3206 transitions. [2021-11-07 01:03:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:03:53,001 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:03:53,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:53,033 INFO L225 Difference]: With dead ends: 1835 [2021-11-07 01:03:53,033 INFO L226 Difference]: Without dead ends: 1052 [2021-11-07 01:03:53,042 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:03:53,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-11-07 01:03:53,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1052. [2021-11-07 01:03:53,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1046 states have (on average 1.7609942638623326) internal successors, (1842), 1051 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:53,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1842 transitions. [2021-11-07 01:03:53,165 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1842 transitions. Word has length 65 [2021-11-07 01:03:53,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:53,166 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 1842 transitions. [2021-11-07 01:03:53,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:53,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1842 transitions. [2021-11-07 01:03:53,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:03:53,172 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:53,173 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:53,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:53,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:53,392 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:03:53,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:53,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1110196166, now seen corresponding path program 1 times [2021-11-07 01:03:53,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:53,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [720077094] [2021-11-07 01:03:53,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:53,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:53,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:53,400 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:53,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:03:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:53,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:03:53,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:54,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:54,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:54,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [720077094] [2021-11-07 01:03:54,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [720077094] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:54,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:54,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:03:54,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782555666] [2021-11-07 01:03:54,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:03:54,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:54,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:03:54,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:03:54,528 INFO L87 Difference]: Start difference. First operand 1052 states and 1842 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:54,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:54,769 INFO L93 Difference]: Finished difference Result 3126 states and 5478 transitions. [2021-11-07 01:03:54,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:03:54,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:03:54,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:54,792 INFO L225 Difference]: With dead ends: 3126 [2021-11-07 01:03:54,792 INFO L226 Difference]: Without dead ends: 2089 [2021-11-07 01:03:54,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:03:54,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-11-07 01:03:54,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1051. [2021-11-07 01:03:54,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1045 states have (on average 1.7578947368421052) internal successors, (1837), 1050 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:54,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1837 transitions. [2021-11-07 01:03:54,946 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1837 transitions. Word has length 66 [2021-11-07 01:03:54,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:54,948 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 1837 transitions. [2021-11-07 01:03:54,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:54,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1837 transitions. [2021-11-07 01:03:54,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:03:54,961 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:54,962 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:54,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:55,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:55,180 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:03:55,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:55,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1767664236, now seen corresponding path program 1 times [2021-11-07 01:03:55,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:55,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276827355] [2021-11-07 01:03:55,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:55,183 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:55,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:55,185 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:55,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:03:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:55,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:03:55,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:56,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:56,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:56,257 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:56,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276827355] [2021-11-07 01:03:56,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276827355] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:56,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:56,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:03:56,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426888893] [2021-11-07 01:03:56,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:03:56,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:56,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:03:56,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:03:56,261 INFO L87 Difference]: Start difference. First operand 1051 states and 1837 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:56,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:56,804 INFO L93 Difference]: Finished difference Result 4121 states and 7210 transitions. [2021-11-07 01:03:56,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:03:56,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:03:56,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:56,830 INFO L225 Difference]: With dead ends: 4121 [2021-11-07 01:03:56,830 INFO L226 Difference]: Without dead ends: 3088 [2021-11-07 01:03:56,833 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:03:56,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2021-11-07 01:03:56,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 1050. [2021-11-07 01:03:56,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1044 states have (on average 1.7557471264367817) internal successors, (1833), 1049 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:56,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1833 transitions. [2021-11-07 01:03:56,932 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1833 transitions. Word has length 68 [2021-11-07 01:03:56,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:56,932 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 1833 transitions. [2021-11-07 01:03:56,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:56,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1833 transitions. [2021-11-07 01:03:56,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:03:56,935 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:56,936 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:56,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:57,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:57,150 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:03:57,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:57,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1602676127, now seen corresponding path program 1 times [2021-11-07 01:03:57,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:57,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353936390] [2021-11-07 01:03:57,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:57,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:57,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:57,156 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:57,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:03:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:57,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:03:57,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:58,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:58,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:58,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353936390] [2021-11-07 01:03:58,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353936390] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:58,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:58,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:03:58,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067133750] [2021-11-07 01:03:58,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:03:58,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:58,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:03:58,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:03:58,326 INFO L87 Difference]: Start difference. First operand 1050 states and 1833 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:58,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:58,499 INFO L93 Difference]: Finished difference Result 2097 states and 3663 transitions. [2021-11-07 01:03:58,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:03:58,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:03:58,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:58,512 INFO L225 Difference]: With dead ends: 2097 [2021-11-07 01:03:58,512 INFO L226 Difference]: Without dead ends: 1055 [2021-11-07 01:03:58,514 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:03:58,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-11-07 01:03:58,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1050. [2021-11-07 01:03:58,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1044 states have (on average 1.7528735632183907) internal successors, (1830), 1049 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:58,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1830 transitions. [2021-11-07 01:03:58,614 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1830 transitions. Word has length 69 [2021-11-07 01:03:58,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:58,614 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 1830 transitions. [2021-11-07 01:03:58,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:58,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1830 transitions. [2021-11-07 01:03:58,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:03:58,617 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:58,617 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:58,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:58,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:58,837 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:03:58,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:58,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1495906388, now seen corresponding path program 1 times [2021-11-07 01:03:58,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:58,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137293219] [2021-11-07 01:03:58,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:58,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:58,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:58,841 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:58,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:03:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:59,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:03:59,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:59,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:59,963 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:59,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137293219] [2021-11-07 01:03:59,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137293219] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:59,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:59,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:03:59,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516225387] [2021-11-07 01:03:59,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:03:59,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:59,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:03:59,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:03:59,966 INFO L87 Difference]: Start difference. First operand 1050 states and 1830 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:00,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:00,468 INFO L93 Difference]: Finished difference Result 4108 states and 7186 transitions. [2021-11-07 01:04:00,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:04:00,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:04:00,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:00,493 INFO L225 Difference]: With dead ends: 4108 [2021-11-07 01:04:00,493 INFO L226 Difference]: Without dead ends: 3084 [2021-11-07 01:04:00,499 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:04:00,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2021-11-07 01:04:00,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 1050. [2021-11-07 01:04:00,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1044 states have (on average 1.75) internal successors, (1827), 1049 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1827 transitions. [2021-11-07 01:04:00,646 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1827 transitions. Word has length 70 [2021-11-07 01:04:00,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:00,646 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 1827 transitions. [2021-11-07 01:04:00,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:00,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1827 transitions. [2021-11-07 01:04:00,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:04:00,649 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:00,649 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:00,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:00,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:00,868 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:00,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:00,868 INFO L85 PathProgramCache]: Analyzing trace with hash -451548143, now seen corresponding path program 1 times [2021-11-07 01:04:00,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:00,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931815123] [2021-11-07 01:04:00,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:00,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:00,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:00,873 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:00,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:04:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:01,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:01,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:01,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:02,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:02,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931815123] [2021-11-07 01:04:02,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931815123] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:02,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:02,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:04:02,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442725569] [2021-11-07 01:04:02,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:04:02,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:02,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:04:02,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:04:02,024 INFO L87 Difference]: Start difference. First operand 1050 states and 1827 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:02,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:02,233 INFO L93 Difference]: Finished difference Result 2845 states and 4953 transitions. [2021-11-07 01:04:02,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:04:02,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:04:02,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:02,250 INFO L225 Difference]: With dead ends: 2845 [2021-11-07 01:04:02,250 INFO L226 Difference]: Without dead ends: 2074 [2021-11-07 01:04:02,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:04:02,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2021-11-07 01:04:02,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1303. [2021-11-07 01:04:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1297 states have (on average 1.7679259830377796) internal successors, (2293), 1302 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:02,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 2293 transitions. [2021-11-07 01:04:02,389 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 2293 transitions. Word has length 72 [2021-11-07 01:04:02,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:02,390 INFO L470 AbstractCegarLoop]: Abstraction has 1303 states and 2293 transitions. [2021-11-07 01:04:02,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:02,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 2293 transitions. [2021-11-07 01:04:02,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:04:02,402 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:02,402 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:02,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:02,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:02,621 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:02,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:02,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1409043200, now seen corresponding path program 1 times [2021-11-07 01:04:02,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:02,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195226338] [2021-11-07 01:04:02,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:02,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:02,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:02,625 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:02,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:04:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:03,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:03,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:03,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:03,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:03,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195226338] [2021-11-07 01:04:03,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195226338] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:03,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:03,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:04:03,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465190605] [2021-11-07 01:04:03,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:03,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:03,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:03,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:03,793 INFO L87 Difference]: Start difference. First operand 1303 states and 2293 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:04,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:04,049 INFO L93 Difference]: Finished difference Result 3494 states and 6152 transitions. [2021-11-07 01:04:04,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:04,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:04:04,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:04,069 INFO L225 Difference]: With dead ends: 3494 [2021-11-07 01:04:04,069 INFO L226 Difference]: Without dead ends: 2275 [2021-11-07 01:04:04,073 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:04,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2021-11-07 01:04:04,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 1504. [2021-11-07 01:04:04,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1498 states have (on average 1.7770360480640854) internal successors, (2662), 1503 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 2662 transitions. [2021-11-07 01:04:04,231 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 2662 transitions. Word has length 84 [2021-11-07 01:04:04,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:04,231 INFO L470 AbstractCegarLoop]: Abstraction has 1504 states and 2662 transitions. [2021-11-07 01:04:04,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:04,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 2662 transitions. [2021-11-07 01:04:04,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:04:04,235 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:04,236 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:04,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:04,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:04,455 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:04,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:04,455 INFO L85 PathProgramCache]: Analyzing trace with hash -551247743, now seen corresponding path program 1 times [2021-11-07 01:04:04,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:04,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670753704] [2021-11-07 01:04:04,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:04,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:04,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:04,461 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:04,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:04:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:05,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:05,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:05,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:05,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:05,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:05,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670753704] [2021-11-07 01:04:05,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670753704] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:05,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:05,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:04:05,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213981126] [2021-11-07 01:04:05,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:05,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:05,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:05,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:05,648 INFO L87 Difference]: Start difference. First operand 1504 states and 2662 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:05,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:05,938 INFO L93 Difference]: Finished difference Result 4141 states and 7345 transitions. [2021-11-07 01:04:05,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:05,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 01:04:05,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:05,959 INFO L225 Difference]: With dead ends: 4141 [2021-11-07 01:04:05,960 INFO L226 Difference]: Without dead ends: 2725 [2021-11-07 01:04:05,965 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:05,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-11-07 01:04:06,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1954. [2021-11-07 01:04:06,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1954 states, 1948 states have (on average 1.7915811088295688) internal successors, (3490), 1953 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:06,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1954 states to 1954 states and 3490 transitions. [2021-11-07 01:04:06,210 INFO L78 Accepts]: Start accepts. Automaton has 1954 states and 3490 transitions. Word has length 85 [2021-11-07 01:04:06,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:06,210 INFO L470 AbstractCegarLoop]: Abstraction has 1954 states and 3490 transitions. [2021-11-07 01:04:06,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:06,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1954 states and 3490 transitions. [2021-11-07 01:04:06,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:04:06,216 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:06,216 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:06,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:06,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:06,437 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:06,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:06,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1231940943, now seen corresponding path program 1 times [2021-11-07 01:04:06,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:06,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076213466] [2021-11-07 01:04:06,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:06,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:06,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:06,441 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:06,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:04:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:07,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:07,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:07,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:07,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:07,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076213466] [2021-11-07 01:04:07,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076213466] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:07,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:07,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:04:07,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943243372] [2021-11-07 01:04:07,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:04:07,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:07,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:04:07,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:04:07,844 INFO L87 Difference]: Start difference. First operand 1954 states and 3490 transitions. Second operand has 4 states, 4 states have (on average 23.25) 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 01:04:08,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:08,162 INFO L93 Difference]: Finished difference Result 4394 states and 7808 transitions. [2021-11-07 01:04:08,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:08,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) 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 86 [2021-11-07 01:04:08,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:08,184 INFO L225 Difference]: With dead ends: 4394 [2021-11-07 01:04:08,184 INFO L226 Difference]: Without dead ends: 2725 [2021-11-07 01:04:08,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:04:08,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-11-07 01:04:08,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1954. [2021-11-07 01:04:08,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1954 states, 1948 states have (on average 1.7905544147843941) internal successors, (3488), 1953 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:08,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1954 states to 1954 states and 3488 transitions. [2021-11-07 01:04:08,383 INFO L78 Accepts]: Start accepts. Automaton has 1954 states and 3488 transitions. Word has length 86 [2021-11-07 01:04:08,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:08,384 INFO L470 AbstractCegarLoop]: Abstraction has 1954 states and 3488 transitions. [2021-11-07 01:04:08,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) 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 01:04:08,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1954 states and 3488 transitions. [2021-11-07 01:04:08,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:04:08,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:08,389 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:08,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:08,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:08,609 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:08,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:08,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1109305234, now seen corresponding path program 1 times [2021-11-07 01:04:08,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:08,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199607176] [2021-11-07 01:04:08,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:08,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:08,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:08,613 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:08,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:04:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:09,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:09,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:09,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:09,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:09,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199607176] [2021-11-07 01:04:09,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199607176] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:09,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:09,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:04:09,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231520074] [2021-11-07 01:04:09,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:09,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:09,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:09,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:09,863 INFO L87 Difference]: Start difference. First operand 1954 states and 3488 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:10,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:10,187 INFO L93 Difference]: Finished difference Result 5463 states and 9778 transitions. [2021-11-07 01:04:10,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:10,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-11-07 01:04:10,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:10,222 INFO L225 Difference]: With dead ends: 5463 [2021-11-07 01:04:10,222 INFO L226 Difference]: Without dead ends: 3605 [2021-11-07 01:04:10,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:10,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3605 states. [2021-11-07 01:04:10,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3605 to 2834. [2021-11-07 01:04:10,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2834 states, 2828 states have (on average 1.8058698727015559) internal successors, (5107), 2833 states have internal predecessors, (5107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:10,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 5107 transitions. [2021-11-07 01:04:10,538 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 5107 transitions. Word has length 86 [2021-11-07 01:04:10,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:10,539 INFO L470 AbstractCegarLoop]: Abstraction has 2834 states and 5107 transitions. [2021-11-07 01:04:10,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:10,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 5107 transitions. [2021-11-07 01:04:10,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:04:10,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:10,550 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:10,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:10,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:10,765 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:10,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:10,765 INFO L85 PathProgramCache]: Analyzing trace with hash -142274817, now seen corresponding path program 1 times [2021-11-07 01:04:10,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:10,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792526512] [2021-11-07 01:04:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:10,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:10,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:10,769 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:10,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:04:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:11,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:11,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:11,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:12,197 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:12,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792526512] [2021-11-07 01:04:12,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792526512] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:12,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:12,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:04:12,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931202135] [2021-11-07 01:04:12,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:12,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:12,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:12,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:12,200 INFO L87 Difference]: Start difference. First operand 2834 states and 5107 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 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 01:04:12,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:12,576 INFO L93 Difference]: Finished difference Result 7839 states and 14154 transitions. [2021-11-07 01:04:12,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:12,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 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 87 [2021-11-07 01:04:12,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:12,616 INFO L225 Difference]: With dead ends: 7839 [2021-11-07 01:04:12,616 INFO L226 Difference]: Without dead ends: 5135 [2021-11-07 01:04:12,621 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:12,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5135 states. [2021-11-07 01:04:12,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5135 to 4364. [2021-11-07 01:04:13,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4364 states, 4358 states have (on average 1.8173474070674622) internal successors, (7920), 4363 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:13,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4364 states to 4364 states and 7920 transitions. [2021-11-07 01:04:13,044 INFO L78 Accepts]: Start accepts. Automaton has 4364 states and 7920 transitions. Word has length 87 [2021-11-07 01:04:13,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:13,046 INFO L470 AbstractCegarLoop]: Abstraction has 4364 states and 7920 transitions. [2021-11-07 01:04:13,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 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 01:04:13,047 INFO L276 IsEmpty]: Start isEmpty. Operand 4364 states and 7920 transitions. [2021-11-07 01:04:13,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:04:13,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:13,060 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:13,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:13,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:13,274 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:13,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:13,275 INFO L85 PathProgramCache]: Analyzing trace with hash -492688479, now seen corresponding path program 1 times [2021-11-07 01:04:13,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:13,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243567237] [2021-11-07 01:04:13,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:13,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:13,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:13,278 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:13,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:04:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:14,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:14,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:14,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:14,654 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:14,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243567237] [2021-11-07 01:04:14,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243567237] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:14,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:14,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:04:14,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025607767] [2021-11-07 01:04:14,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:14,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:14,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:14,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:14,657 INFO L87 Difference]: Start difference. First operand 4364 states and 7920 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:15,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:15,145 INFO L93 Difference]: Finished difference Result 12145 states and 22076 transitions. [2021-11-07 01:04:15,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:15,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 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 88 [2021-11-07 01:04:15,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:15,176 INFO L225 Difference]: With dead ends: 12145 [2021-11-07 01:04:15,176 INFO L226 Difference]: Without dead ends: 7945 [2021-11-07 01:04:15,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:15,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7945 states. [2021-11-07 01:04:15,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7945 to 7174. [2021-11-07 01:04:15,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7174 states, 7168 states have (on average 1.8249162946428572) internal successors, (13081), 7173 states have internal predecessors, (13081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:15,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7174 states to 7174 states and 13081 transitions. [2021-11-07 01:04:15,781 INFO L78 Accepts]: Start accepts. Automaton has 7174 states and 13081 transitions. Word has length 88 [2021-11-07 01:04:15,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:15,782 INFO L470 AbstractCegarLoop]: Abstraction has 7174 states and 13081 transitions. [2021-11-07 01:04:15,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:15,782 INFO L276 IsEmpty]: Start isEmpty. Operand 7174 states and 13081 transitions. [2021-11-07 01:04:15,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:04:15,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:15,798 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] [2021-11-07 01:04:15,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:16,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:16,019 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:16,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:16,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1375752669, now seen corresponding path program 1 times [2021-11-07 01:04:16,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:16,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859261937] [2021-11-07 01:04:16,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:16,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:16,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:16,022 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:16,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:04:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:16,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:04:16,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:04:17,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:04:17,410 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:17,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859261937] [2021-11-07 01:04:17,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859261937] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:17,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:17,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:04:17,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503486050] [2021-11-07 01:04:17,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:04:17,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:17,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:04:17,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:04:17,414 INFO L87 Difference]: Start difference. First operand 7174 states and 13081 transitions. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:20,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:20,891 INFO L93 Difference]: Finished difference Result 27219 states and 49680 transitions. [2021-11-07 01:04:20,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:04:20,891 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 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 89 [2021-11-07 01:04:20,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:20,961 INFO L225 Difference]: With dead ends: 27219 [2021-11-07 01:04:20,962 INFO L226 Difference]: Without dead ends: 20328 [2021-11-07 01:04:20,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:04:21,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20328 states. [2021-11-07 01:04:21,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20328 to 7124. [2021-11-07 01:04:21,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7124 states, 7118 states have (on average 1.8096375386344479) internal successors, (12881), 7123 states have internal predecessors, (12881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7124 states to 7124 states and 12881 transitions. [2021-11-07 01:04:21,666 INFO L78 Accepts]: Start accepts. Automaton has 7124 states and 12881 transitions. Word has length 89 [2021-11-07 01:04:21,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:21,667 INFO L470 AbstractCegarLoop]: Abstraction has 7124 states and 12881 transitions. [2021-11-07 01:04:21,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:21,668 INFO L276 IsEmpty]: Start isEmpty. Operand 7124 states and 12881 transitions. [2021-11-07 01:04:21,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:04:21,683 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:21,683 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:21,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:21,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:21,899 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:21,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:21,899 INFO L85 PathProgramCache]: Analyzing trace with hash 497023214, now seen corresponding path program 1 times [2021-11-07 01:04:21,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:21,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077287602] [2021-11-07 01:04:21,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:21,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:21,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:21,902 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:21,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:04:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:22,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:22,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:23,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:23,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:23,409 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:23,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077287602] [2021-11-07 01:04:23,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077287602] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:23,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:23,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:04:23,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510762871] [2021-11-07 01:04:23,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:23,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:23,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:23,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:23,412 INFO L87 Difference]: Start difference. First operand 7124 states and 12881 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:24,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:24,149 INFO L93 Difference]: Finished difference Result 20886 states and 37813 transitions. [2021-11-07 01:04:24,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:24,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2021-11-07 01:04:24,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:24,198 INFO L225 Difference]: With dead ends: 20886 [2021-11-07 01:04:24,199 INFO L226 Difference]: Without dead ends: 13929 [2021-11-07 01:04:24,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:24,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13929 states. [2021-11-07 01:04:25,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13929 to 13158. [2021-11-07 01:04:25,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13158 states, 13152 states have (on average 1.8128041362530414) internal successors, (23842), 13157 states have internal predecessors, (23842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:25,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13158 states to 13158 states and 23842 transitions. [2021-11-07 01:04:25,238 INFO L78 Accepts]: Start accepts. Automaton has 13158 states and 23842 transitions. Word has length 89 [2021-11-07 01:04:25,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:25,238 INFO L470 AbstractCegarLoop]: Abstraction has 13158 states and 23842 transitions. [2021-11-07 01:04:25,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:25,239 INFO L276 IsEmpty]: Start isEmpty. Operand 13158 states and 23842 transitions. [2021-11-07 01:04:25,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:04:25,261 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:25,262 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] [2021-11-07 01:04:25,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:25,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:25,487 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:25,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:25,487 INFO L85 PathProgramCache]: Analyzing trace with hash 2117357634, now seen corresponding path program 1 times [2021-11-07 01:04:25,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:25,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531659080] [2021-11-07 01:04:25,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:25,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:25,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:25,489 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:25,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:04:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:26,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:04:26,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:26,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:27,054 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:27,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531659080] [2021-11-07 01:04:27,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531659080] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:04:27,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [933384844] [2021-11-07 01:04:27,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:27,055 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:04:27,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:04:27,058 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:04:27,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:04:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:28,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:04:28,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:28,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:04:28,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:04:28,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [933384844] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:28,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:04:28,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:04:28,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288450861] [2021-11-07 01:04:28,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:04:28,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:28,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:04:28,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:04:28,878 INFO L87 Difference]: Start difference. First operand 13158 states and 23842 transitions. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:38,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:38,269 INFO L93 Difference]: Finished difference Result 88770 states and 160503 transitions. [2021-11-07 01:04:38,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 01:04:38,270 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 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 90 [2021-11-07 01:04:38,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:38,637 INFO L225 Difference]: With dead ends: 88770 [2021-11-07 01:04:38,637 INFO L226 Difference]: Without dead ends: 88017 [2021-11-07 01:04:38,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 01:04:38,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88017 states. [2021-11-07 01:04:41,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88017 to 25925. [2021-11-07 01:04:41,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25925 states, 25919 states have (on average 1.8139974536054633) internal successors, (47017), 25924 states have internal predecessors, (47017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25925 states to 25925 states and 47017 transitions. [2021-11-07 01:04:41,117 INFO L78 Accepts]: Start accepts. Automaton has 25925 states and 47017 transitions. Word has length 90 [2021-11-07 01:04:41,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:41,117 INFO L470 AbstractCegarLoop]: Abstraction has 25925 states and 47017 transitions. [2021-11-07 01:04:41,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:41,118 INFO L276 IsEmpty]: Start isEmpty. Operand 25925 states and 47017 transitions. [2021-11-07 01:04:41,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 01:04:41,154 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:41,154 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] [2021-11-07 01:04:41,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-07 01:04:41,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:41,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:41,560 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:41,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:41,560 INFO L85 PathProgramCache]: Analyzing trace with hash -736144673, now seen corresponding path program 1 times [2021-11-07 01:04:41,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:41,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927596021] [2021-11-07 01:04:41,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:41,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:41,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:41,562 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:41,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:04:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:42,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:04:42,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:42,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:42,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:42,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927596021] [2021-11-07 01:04:42,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927596021] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:04:42,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [15407148] [2021-11-07 01:04:42,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:42,886 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:04:42,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:04:42,887 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:04:42,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:04:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:43,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:04:43,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:04:44,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:44,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:04:44,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [15407148] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:44,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:04:44,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:04:44,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703418243] [2021-11-07 01:04:44,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:04:44,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:44,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:04:44,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:04:44,492 INFO L87 Difference]: Start difference. First operand 25925 states and 47017 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:47,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:47,819 INFO L93 Difference]: Finished difference Result 27982 states and 50562 transitions. [2021-11-07 01:04:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:04:47,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-07 01:04:47,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:47,867 INFO L225 Difference]: With dead ends: 27982 [2021-11-07 01:04:47,868 INFO L226 Difference]: Without dead ends: 26839 [2021-11-07 01:04:47,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:04:47,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26839 states. [2021-11-07 01:04:49,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26839 to 25919. [2021-11-07 01:04:49,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25919 states, 25913 states have (on average 1.81391579516073) internal successors, (47004), 25918 states have internal predecessors, (47004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:49,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25919 states to 25919 states and 47004 transitions. [2021-11-07 01:04:49,645 INFO L78 Accepts]: Start accepts. Automaton has 25919 states and 47004 transitions. Word has length 91 [2021-11-07 01:04:49,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:49,646 INFO L470 AbstractCegarLoop]: Abstraction has 25919 states and 47004 transitions. [2021-11-07 01:04:49,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:49,646 INFO L276 IsEmpty]: Start isEmpty. Operand 25919 states and 47004 transitions. [2021-11-07 01:04:49,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 01:04:49,666 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:49,666 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] [2021-11-07 01:04:49,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:49,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:50,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:04:50,068 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:50,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:50,069 INFO L85 PathProgramCache]: Analyzing trace with hash -276335057, now seen corresponding path program 1 times [2021-11-07 01:04:50,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:50,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313506347] [2021-11-07 01:04:50,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:50,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:50,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:50,070 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:50,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:04:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:50,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:04:50,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:04:51,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:04:51,314 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:51,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313506347] [2021-11-07 01:04:51,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313506347] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:51,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:51,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:04:51,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397480101] [2021-11-07 01:04:51,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:04:51,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:51,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:04:51,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:04:51,316 INFO L87 Difference]: Start difference. First operand 25919 states and 47004 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:52,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:52,595 INFO L93 Difference]: Finished difference Result 51179 states and 93020 transitions. [2021-11-07 01:04:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:04:52,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-07 01:04:52,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:52,627 INFO L225 Difference]: With dead ends: 51179 [2021-11-07 01:04:52,627 INFO L226 Difference]: Without dead ends: 25546 [2021-11-07 01:04:52,653 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:04:52,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25546 states. [2021-11-07 01:04:53,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25546 to 13156. [2021-11-07 01:04:53,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13156 states, 13150 states have (on average 1.8123954372623574) internal successors, (23833), 13155 states have internal predecessors, (23833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:53,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13156 states to 13156 states and 23833 transitions. [2021-11-07 01:04:53,578 INFO L78 Accepts]: Start accepts. Automaton has 13156 states and 23833 transitions. Word has length 91 [2021-11-07 01:04:53,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:53,578 INFO L470 AbstractCegarLoop]: Abstraction has 13156 states and 23833 transitions. [2021-11-07 01:04:53,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:53,578 INFO L276 IsEmpty]: Start isEmpty. Operand 13156 states and 23833 transitions. [2021-11-07 01:04:53,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 01:04:53,589 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:53,589 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] [2021-11-07 01:04:53,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-07 01:04:53,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:53,791 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:53,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:53,792 INFO L85 PathProgramCache]: Analyzing trace with hash -2039844303, now seen corresponding path program 1 times [2021-11-07 01:04:53,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:53,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432424392] [2021-11-07 01:04:53,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:53,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:53,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:53,794 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:53,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:04:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:54,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:04:54,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:55,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:55,244 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:55,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432424392] [2021-11-07 01:04:55,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432424392] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:04:55,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1219777670] [2021-11-07 01:04:55,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:55,244 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:04:55,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:04:55,246 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:04:55,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:04:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:56,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:04:56,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:57,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:04:57,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:57,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:04:57,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1219777670] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:57,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:04:57,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:04:57,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961690787] [2021-11-07 01:04:57,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:04:57,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:57,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:04:57,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:04:57,597 INFO L87 Difference]: Start difference. First operand 13156 states and 23833 transitions. Second operand has 16 states, 16 states have (on average 9.0625) internal successors, (145), 15 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:17,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:17,028 INFO L93 Difference]: Finished difference Result 32147 states and 57406 transitions. [2021-11-07 01:05:17,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 01:05:17,029 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.0625) internal successors, (145), 15 states have internal predecessors, (145), 0 states have call successors, (0), 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 93 [2021-11-07 01:05:17,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:17,088 INFO L225 Difference]: With dead ends: 32147 [2021-11-07 01:05:17,088 INFO L226 Difference]: Without dead ends: 31442 [2021-11-07 01:05:17,098 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 01:05:17,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31442 states. [2021-11-07 01:05:18,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31442 to 25902. [2021-11-07 01:05:18,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25902 states, 25896 states have (on average 1.813909484090207) internal successors, (46973), 25901 states have internal predecessors, (46973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:18,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25902 states to 25902 states and 46973 transitions. [2021-11-07 01:05:18,841 INFO L78 Accepts]: Start accepts. Automaton has 25902 states and 46973 transitions. Word has length 93 [2021-11-07 01:05:18,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:18,841 INFO L470 AbstractCegarLoop]: Abstraction has 25902 states and 46973 transitions. [2021-11-07 01:05:18,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.0625) internal successors, (145), 15 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:18,841 INFO L276 IsEmpty]: Start isEmpty. Operand 25902 states and 46973 transitions. [2021-11-07 01:05:18,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 01:05:18,857 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:18,857 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] [2021-11-07 01:05:18,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:19,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:19,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:19,258 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:05:19,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:19,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1287169735, now seen corresponding path program 1 times [2021-11-07 01:05:19,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:19,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040952745] [2021-11-07 01:05:19,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:19,259 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:19,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:19,259 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:19,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:05:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:20,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:05:20,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:20,498 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:20,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:20,762 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:20,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040952745] [2021-11-07 01:05:20,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040952745] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:05:20,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [114290836] [2021-11-07 01:05:20,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:20,763 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:20,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:05:20,763 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:05:20,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:05:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:22,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:05:22,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:05:22,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:05:22,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [114290836] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:22,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:05:22,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:05:22,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667307673] [2021-11-07 01:05:22,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:05:22,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:22,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:05:22,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:05:22,488 INFO L87 Difference]: Start difference. First operand 25902 states and 46973 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:23,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:23,858 INFO L93 Difference]: Finished difference Result 27326 states and 49416 transitions. [2021-11-07 01:05:23,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:05:23,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 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 94 [2021-11-07 01:05:23,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:23,892 INFO L225 Difference]: With dead ends: 27326 [2021-11-07 01:05:23,892 INFO L226 Difference]: Without dead ends: 26560 [2021-11-07 01:05:23,897 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 364 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 01:05:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26560 states. [2021-11-07 01:05:25,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26560 to 25901. [2021-11-07 01:05:25,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25901 states, 25895 states have (on average 1.8138250627534274) internal successors, (46969), 25900 states have internal predecessors, (46969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25901 states to 25901 states and 46969 transitions. [2021-11-07 01:05:25,285 INFO L78 Accepts]: Start accepts. Automaton has 25901 states and 46969 transitions. Word has length 94 [2021-11-07 01:05:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:25,285 INFO L470 AbstractCegarLoop]: Abstraction has 25901 states and 46969 transitions. [2021-11-07 01:05:25,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:25,285 INFO L276 IsEmpty]: Start isEmpty. Operand 25901 states and 46969 transitions. [2021-11-07 01:05:25,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 01:05:25,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:25,303 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] [2021-11-07 01:05:25,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:25,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:25,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:25,705 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:05:25,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:25,706 INFO L85 PathProgramCache]: Analyzing trace with hash -178677737, now seen corresponding path program 1 times [2021-11-07 01:05:25,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:25,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210017687] [2021-11-07 01:05:25,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:25,706 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:25,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:25,707 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:25,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:05:26,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:26,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:05:26,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:27,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:27,378 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:27,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210017687] [2021-11-07 01:05:27,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210017687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:05:27,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [302990494] [2021-11-07 01:05:27,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:27,379 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:27,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:05:27,380 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:05:27,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:05:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:28,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:05:28,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:05:29,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:05:29,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [302990494] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:29,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:05:29,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 01:05:29,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796086984] [2021-11-07 01:05:29,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:05:29,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:29,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:05:29,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:05:29,645 INFO L87 Difference]: Start difference. First operand 25901 states and 46969 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:33,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:33,490 INFO L93 Difference]: Finished difference Result 27717 states and 50041 transitions. [2021-11-07 01:05:33,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:05:33,491 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 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 94 [2021-11-07 01:05:33,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:33,528 INFO L225 Difference]: With dead ends: 27717 [2021-11-07 01:05:33,528 INFO L226 Difference]: Without dead ends: 26493 [2021-11-07 01:05:33,537 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 360 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 01:05:33,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26493 states. [2021-11-07 01:05:35,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26493 to 25865. [2021-11-07 01:05:35,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25865 states, 25859 states have (on average 1.8132178351831083) internal successors, (46888), 25864 states have internal predecessors, (46888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:35,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25865 states to 25865 states and 46888 transitions. [2021-11-07 01:05:35,094 INFO L78 Accepts]: Start accepts. Automaton has 25865 states and 46888 transitions. Word has length 94 [2021-11-07 01:05:35,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:35,094 INFO L470 AbstractCegarLoop]: Abstraction has 25865 states and 46888 transitions. [2021-11-07 01:05:35,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:35,095 INFO L276 IsEmpty]: Start isEmpty. Operand 25865 states and 46888 transitions. [2021-11-07 01:05:35,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 01:05:35,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:35,128 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] [2021-11-07 01:05:35,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:35,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:35,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:35,529 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:05:35,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:35,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1339647761, now seen corresponding path program 1 times [2021-11-07 01:05:35,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:35,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641748682] [2021-11-07 01:05:35,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:35,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:35,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:35,532 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:35,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:05:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:36,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:05:36,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:37,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:37,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:37,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641748682] [2021-11-07 01:05:37,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641748682] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:05:37,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [470716612] [2021-11-07 01:05:37,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:37,269 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:37,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:05:37,270 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:05:37,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:05:38,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:38,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:05:38,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:05:39,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:05:40,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [470716612] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:40,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:05:40,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:05:40,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860639178] [2021-11-07 01:05:40,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:05:40,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:40,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:05:40,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:05:40,113 INFO L87 Difference]: Start difference. First operand 25865 states and 46888 transitions. Second operand has 16 states, 16 states have (on average 9.1875) internal successors, (147), 15 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:58,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:58,733 INFO L93 Difference]: Finished difference Result 59815 states and 107287 transitions. [2021-11-07 01:05:58,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:05:58,734 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.1875) internal successors, (147), 15 states have internal predecessors, (147), 0 states have call successors, (0), 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 94 [2021-11-07 01:05:58,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:58,823 INFO L225 Difference]: With dead ends: 59815 [2021-11-07 01:05:58,823 INFO L226 Difference]: Without dead ends: 58627 [2021-11-07 01:05:58,832 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 01:05:58,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58627 states. [2021-11-07 01:06:01,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58627 to 51247. [2021-11-07 01:06:01,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51247 states, 51241 states have (on average 1.8139966042817275) internal successors, (92951), 51246 states have internal predecessors, (92951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:01,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51247 states to 51247 states and 92951 transitions. [2021-11-07 01:06:01,662 INFO L78 Accepts]: Start accepts. Automaton has 51247 states and 92951 transitions. Word has length 94 [2021-11-07 01:06:01,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:01,662 INFO L470 AbstractCegarLoop]: Abstraction has 51247 states and 92951 transitions. [2021-11-07 01:06:01,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.1875) internal successors, (147), 15 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:01,663 INFO L276 IsEmpty]: Start isEmpty. Operand 51247 states and 92951 transitions. [2021-11-07 01:06:01,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 01:06:01,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:01,737 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] [2021-11-07 01:06:01,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-07 01:06:01,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:02,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:06:02,151 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:06:02,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:02,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1317015507, now seen corresponding path program 1 times [2021-11-07 01:06:02,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:02,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272011167] [2021-11-07 01:06:02,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:02,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:02,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:02,154 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:02,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:06:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:03,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:06:03,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:03,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:04,038 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:04,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272011167] [2021-11-07 01:06:04,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272011167] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:06:04,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1013315404] [2021-11-07 01:06:04,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:04,039 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:06:04,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:06:04,039 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:06:04,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:06:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:05,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:06:05,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:06:06,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:06:06,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1013315404] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:06,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:06:06,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 20 [2021-11-07 01:06:06,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847339855] [2021-11-07 01:06:06,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:06:06,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:06,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:06:06,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:06:06,692 INFO L87 Difference]: Start difference. First operand 51247 states and 92951 transitions. Second operand has 14 states, 14 states have (on average 10.642857142857142) internal successors, (149), 14 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:18,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:18,621 INFO L93 Difference]: Finished difference Result 69227 states and 123704 transitions. [2021-11-07 01:06:18,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 01:06:18,622 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.642857142857142) internal successors, (149), 14 states have internal predecessors, (149), 0 states have call successors, (0), 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 94 [2021-11-07 01:06:18,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:18,728 INFO L225 Difference]: With dead ends: 69227 [2021-11-07 01:06:18,728 INFO L226 Difference]: Without dead ends: 67215 [2021-11-07 01:06:18,742 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=606, Invalid=1944, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 01:06:18,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67215 states. [2021-11-07 01:06:22,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67215 to 51786. [2021-11-07 01:06:22,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51786 states, 51780 states have (on average 1.811819235225956) internal successors, (93816), 51785 states have internal predecessors, (93816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:22,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51786 states to 51786 states and 93816 transitions. [2021-11-07 01:06:22,252 INFO L78 Accepts]: Start accepts. Automaton has 51786 states and 93816 transitions. Word has length 94 [2021-11-07 01:06:22,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:22,253 INFO L470 AbstractCegarLoop]: Abstraction has 51786 states and 93816 transitions. [2021-11-07 01:06:22,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.642857142857142) internal successors, (149), 14 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:22,253 INFO L276 IsEmpty]: Start isEmpty. Operand 51786 states and 93816 transitions. [2021-11-07 01:06:22,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 01:06:22,287 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:22,287 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] [2021-11-07 01:06:22,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:22,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:22,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:06:22,688 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:06:22,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:22,688 INFO L85 PathProgramCache]: Analyzing trace with hash 404411025, now seen corresponding path program 1 times [2021-11-07 01:06:22,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:22,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584766561] [2021-11-07 01:06:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:22,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:22,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:22,690 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:22,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:06:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:24,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:06:24,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:24,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:24,687 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:24,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584766561] [2021-11-07 01:06:24,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584766561] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:06:24,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [701931877] [2021-11-07 01:06:24,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:24,688 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:06:24,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:06:24,688 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:06:24,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b1a337-8f0d-45c0-b8a8-20e4e2faf905/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:06:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:26,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:06:26,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:26,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:06:26,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:06:27,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [701931877] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:27,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:06:27,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 01:06:27,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138282351] [2021-11-07 01:06:27,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:06:27,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:27,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:06:27,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:06:27,262 INFO L87 Difference]: Start difference. First operand 51786 states and 93816 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:32,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:32,261 INFO L93 Difference]: Finished difference Result 66180 states and 118314 transitions. [2021-11-07 01:06:32,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:06:32,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 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 95 [2021-11-07 01:06:32,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:32,431 INFO L225 Difference]: With dead ends: 66180 [2021-11-07 01:06:32,432 INFO L226 Difference]: Without dead ends: 63923 [2021-11-07 01:06:32,442 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 367 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 01:06:32,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63923 states.