./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec1_product20.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_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/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_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/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_cb64af10-dc11-4169-a87e-db6e69d32756/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 e0e95c13964d33a58c84e6632b6635f09155542b4e87cc9520cc45bb7c6f5f1d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:42:10,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:42:10,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:42:10,682 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:42:10,683 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:42:10,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:42:10,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:42:10,697 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:42:10,700 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:42:10,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:42:10,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:42:10,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:42:10,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:42:10,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:42:10,723 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:42:10,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:42:10,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:42:10,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:42:10,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:42:10,745 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:42:10,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:42:10,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:42:10,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:42:10,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:42:10,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:42:10,769 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:42:10,770 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:42:10,773 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:42:10,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:42:10,776 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:42:10,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:42:10,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:42:10,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:42:10,783 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:42:10,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:42:10,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:42:10,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:42:10,787 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:42:10,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:42:10,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:42:10,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:42:10,790 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:42:10,853 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:42:10,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:42:10,855 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:42:10,856 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:42:10,856 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:42:10,856 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:42:10,856 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:42:10,856 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:42:10,863 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:42:10,863 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:42:10,865 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:42:10,865 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:42:10,865 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:42:10,866 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:42:10,866 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:42:10,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:42:10,867 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:42:10,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:42:10,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:42:10,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:42:10,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:42:10,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:42:10,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:42:10,869 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:42:10,869 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:42:10,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:42:10,869 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:42:10,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:42:10,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:42:10,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:42:10,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:42:10,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:42:10,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:42:10,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:42:10,874 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:42:10,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:42:10,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:42:10,874 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:42:10,875 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:42:10,875 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_cb64af10-dc11-4169-a87e-db6e69d32756/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e95c13964d33a58c84e6632b6635f09155542b4e87cc9520cc45bb7c6f5f1d [2021-11-07 01:42:11,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:42:11,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:42:11,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:42:11,230 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:42:11,231 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:42:11,232 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec1_product20.cil.c [2021-11-07 01:42:11,330 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/data/c6216db1d/fb68e2eacdf14710bd6993ea145ea1cf/FLAG250318db2 [2021-11-07 01:42:12,027 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:42:12,028 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/sv-benchmarks/c/product-lines/email_spec1_product20.cil.c [2021-11-07 01:42:12,058 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/data/c6216db1d/fb68e2eacdf14710bd6993ea145ea1cf/FLAG250318db2 [2021-11-07 01:42:12,225 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/data/c6216db1d/fb68e2eacdf14710bd6993ea145ea1cf [2021-11-07 01:42:12,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:42:12,230 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:42:12,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:12,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:42:12,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:42:12,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:12" (1/1) ... [2021-11-07 01:42:12,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2edf95f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:12, skipping insertion in model container [2021-11-07 01:42:12,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:12" (1/1) ... [2021-11-07 01:42:12,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:42:12,376 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:42:12,810 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_cb64af10-dc11-4169-a87e-db6e69d32756/sv-benchmarks/c/product-lines/email_spec1_product20.cil.c[17698,17711] [2021-11-07 01:42:13,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:13,136 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 01:42:13,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@26f28a41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:13, skipping insertion in model container [2021-11-07 01:42:13,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:13,139 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:42:13,142 INFO L168 Benchmark]: Toolchain (without parser) took 910.23 ms. Allocated memory is still 113.2 MB. Free memory was 75.8 MB in the beginning and 77.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:42:13,144 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 86.0 MB. Free memory was 56.7 MB in the beginning and 56.7 MB in the end (delta: 29.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:42:13,146 INFO L168 Benchmark]: CACSL2BoogieTranslator took 897.88 ms. Allocated memory is still 113.2 MB. Free memory was 75.6 MB in the beginning and 77.1 MB in the end (delta: -1.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:42:13,149 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 86.0 MB. Free memory was 56.7 MB in the beginning and 56.7 MB in the end (delta: 29.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 897.88 ms. Allocated memory is still 113.2 MB. Free memory was 75.6 MB in the beginning and 77.1 MB in the end (delta: -1.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2558]: 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_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/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_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/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_cb64af10-dc11-4169-a87e-db6e69d32756/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 e0e95c13964d33a58c84e6632b6635f09155542b4e87cc9520cc45bb7c6f5f1d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:42:15,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:42:15,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:42:15,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:42:15,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:42:15,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:42:15,720 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:42:15,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:42:15,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:42:15,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:42:15,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:42:15,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:42:15,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:42:15,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:42:15,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:42:15,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:42:15,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:42:15,747 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:42:15,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:42:15,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:42:15,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:42:15,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:42:15,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:42:15,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:42:15,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:42:15,766 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:42:15,767 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:42:15,768 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:42:15,769 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:42:15,771 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:42:15,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:42:15,772 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:42:15,773 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:42:15,775 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:42:15,776 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:42:15,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:42:15,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:42:15,791 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:42:15,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:42:15,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:42:15,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:42:15,795 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:42:15,848 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:42:15,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:42:15,850 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:42:15,851 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:42:15,851 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:42:15,851 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:42:15,851 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:42:15,852 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:42:15,852 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:42:15,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:42:15,855 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:42:15,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:42:15,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:42:15,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:42:15,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:42:15,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:42:15,857 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:42:15,857 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:42:15,857 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:42:15,857 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:42:15,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:42:15,858 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:42:15,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:42:15,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:42:15,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:42:15,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:42:15,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:42:15,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:42:15,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:42:15,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:42:15,860 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:42:15,860 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:15,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:42:15,861 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:42:15,861 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:42:15,862 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_cb64af10-dc11-4169-a87e-db6e69d32756/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e95c13964d33a58c84e6632b6635f09155542b4e87cc9520cc45bb7c6f5f1d [2021-11-07 01:42:16,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:42:16,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:42:16,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:42:16,354 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:42:16,355 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:42:16,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec1_product20.cil.c [2021-11-07 01:42:16,454 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/data/0e53c4d97/52bf2943125d4feb8de1898256bc94a1/FLAGae329d894 [2021-11-07 01:42:17,202 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:42:17,204 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/sv-benchmarks/c/product-lines/email_spec1_product20.cil.c [2021-11-07 01:42:17,232 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/data/0e53c4d97/52bf2943125d4feb8de1898256bc94a1/FLAGae329d894 [2021-11-07 01:42:17,355 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/data/0e53c4d97/52bf2943125d4feb8de1898256bc94a1 [2021-11-07 01:42:17,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:42:17,362 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:42:17,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:17,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:42:17,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:42:17,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:17" (1/1) ... [2021-11-07 01:42:17,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40e186eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:17, skipping insertion in model container [2021-11-07 01:42:17,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:17" (1/1) ... [2021-11-07 01:42:17,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:42:17,526 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:42:18,141 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_cb64af10-dc11-4169-a87e-db6e69d32756/sv-benchmarks/c/product-lines/email_spec1_product20.cil.c[17698,17711] [2021-11-07 01:42:18,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:18,432 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:42:18,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:42:18,499 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_cb64af10-dc11-4169-a87e-db6e69d32756/sv-benchmarks/c/product-lines/email_spec1_product20.cil.c[17698,17711] [2021-11-07 01:42:18,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:18,635 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:42:18,701 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_cb64af10-dc11-4169-a87e-db6e69d32756/sv-benchmarks/c/product-lines/email_spec1_product20.cil.c[17698,17711] [2021-11-07 01:42:18,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:18,830 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:42:18,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:18 WrapperNode [2021-11-07 01:42:18,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:18,832 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:42:18,832 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:42:18,832 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:42:18,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:18" (1/1) ... [2021-11-07 01:42:18,896 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:18" (1/1) ... [2021-11-07 01:42:19,071 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:42:19,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:42:19,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:42:19,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:42:19,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:18" (1/1) ... [2021-11-07 01:42:19,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:18" (1/1) ... [2021-11-07 01:42:19,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:18" (1/1) ... [2021-11-07 01:42:19,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:18" (1/1) ... [2021-11-07 01:42:19,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:18" (1/1) ... [2021-11-07 01:42:19,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:18" (1/1) ... [2021-11-07 01:42:19,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:18" (1/1) ... [2021-11-07 01:42:19,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:42:19,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:42:19,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:42:19,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:42:19,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:18" (1/1) ... [2021-11-07 01:42:19,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:42:19,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:42:19,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:42:19,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:42:19,420 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:42:19,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:42:19,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:42:19,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:42:19,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:42:25,292 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:42:25,292 INFO L299 CfgBuilder]: Removed 529 assume(true) statements. [2021-11-07 01:42:25,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:42:25 BoogieIcfgContainer [2021-11-07 01:42:25,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:42:25,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:42:25,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:42:25,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:42:25,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:42:17" (1/3) ... [2021-11-07 01:42:25,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cfb3c6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:42:25, skipping insertion in model container [2021-11-07 01:42:25,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:18" (2/3) ... [2021-11-07 01:42:25,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cfb3c6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:42:25, skipping insertion in model container [2021-11-07 01:42:25,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:42:25" (3/3) ... [2021-11-07 01:42:25,308 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec1_product20.cil.c [2021-11-07 01:42:25,315 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:42:25,316 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:42:25,397 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:42:25,408 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 01:42:25,409 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:42:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand has 836 states, 829 states have (on average 1.7659831121833534) internal successors, (1464), 835 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:25,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:42:25,525 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:25,526 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:25,527 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 01:42:25,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:25,534 INFO L85 PathProgramCache]: Analyzing trace with hash -892841702, now seen corresponding path program 1 times [2021-11-07 01:42:25,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:25,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721641021] [2021-11-07 01:42:25,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:25,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:25,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:25,562 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:25,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:42:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:26,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:42:26,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:26,352 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 01:42:26,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:26,510 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 01:42:26,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:26,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721641021] [2021-11-07 01:42:26,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721641021] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:26,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:26,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:42:26,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795492996] [2021-11-07 01:42:26,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:42:26,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:26,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:42:26,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:42:26,542 INFO L87 Difference]: Start difference. First operand has 836 states, 829 states have (on average 1.7659831121833534) internal successors, (1464), 835 states have internal predecessors, (1464), 0 states have call successors, (0), 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 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:26,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:26,634 INFO L93 Difference]: Finished difference Result 1387 states and 2405 transitions. [2021-11-07 01:42:26,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:42:26,636 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 01:42:26,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:26,662 INFO L225 Difference]: With dead ends: 1387 [2021-11-07 01:42:26,662 INFO L226 Difference]: Without dead ends: 750 [2021-11-07 01:42:26,670 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 86 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 01:42:26,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-11-07 01:42:26,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2021-11-07 01:42:26,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 744 states have (on average 1.7594086021505377) internal successors, (1309), 749 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:26,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1309 transitions. [2021-11-07 01:42:26,810 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1309 transitions. Word has length 44 [2021-11-07 01:42:26,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:26,811 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 1309 transitions. [2021-11-07 01:42:26,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:26,811 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1309 transitions. [2021-11-07 01:42:26,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:42:26,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:26,815 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:26,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:27,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:27,030 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 01:42:27,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:27,031 INFO L85 PathProgramCache]: Analyzing trace with hash -2121912238, now seen corresponding path program 1 times [2021-11-07 01:42:27,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:27,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498468649] [2021-11-07 01:42:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:27,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:27,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:27,043 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:27,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:42:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:27,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:42:27,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:27,710 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 01:42:27,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:27,888 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 01:42:27,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:27,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498468649] [2021-11-07 01:42:27,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498468649] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:27,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:27,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:42:27,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992475848] [2021-11-07 01:42:27,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:42:27,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:27,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:42:27,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:42:27,897 INFO L87 Difference]: Start difference. First operand 750 states and 1309 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:28,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:28,067 INFO L93 Difference]: Finished difference Result 2220 states and 3879 transitions. [2021-11-07 01:42:28,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:42:28,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 01:42:28,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:28,086 INFO L225 Difference]: With dead ends: 2220 [2021-11-07 01:42:28,087 INFO L226 Difference]: Without dead ends: 1485 [2021-11-07 01:42:28,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:42:28,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1485 states. [2021-11-07 01:42:28,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1485 to 749. [2021-11-07 01:42:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 743 states have (on average 1.7550471063257065) internal successors, (1304), 748 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:28,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1304 transitions. [2021-11-07 01:42:28,151 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1304 transitions. Word has length 45 [2021-11-07 01:42:28,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:28,153 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 1304 transitions. [2021-11-07 01:42:28,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:28,153 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1304 transitions. [2021-11-07 01:42:28,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:42:28,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:28,165 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:28,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:28,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:28,384 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 01:42:28,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:28,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1022986568, now seen corresponding path program 1 times [2021-11-07 01:42:28,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:28,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25014005] [2021-11-07 01:42:28,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:28,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:28,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:28,393 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:28,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:42:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:28,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:42:28,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:29,138 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 01:42:29,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:29,330 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 01:42:29,330 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:29,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25014005] [2021-11-07 01:42:29,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25014005] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:29,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:29,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:42:29,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951885434] [2021-11-07 01:42:29,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:42:29,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:29,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:42:29,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:42:29,334 INFO L87 Difference]: Start difference. First operand 749 states and 1304 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:29,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:29,736 INFO L93 Difference]: Finished difference Result 2913 states and 5078 transitions. [2021-11-07 01:42:29,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:42:29,737 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 01:42:29,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:29,754 INFO L225 Difference]: With dead ends: 2913 [2021-11-07 01:42:29,755 INFO L226 Difference]: Without dead ends: 2182 [2021-11-07 01:42:29,757 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 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 01:42:29,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2021-11-07 01:42:29,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 748. [2021-11-07 01:42:29,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 742 states have (on average 1.752021563342318) internal successors, (1300), 747 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:29,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1300 transitions. [2021-11-07 01:42:29,833 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1300 transitions. Word has length 47 [2021-11-07 01:42:29,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:29,833 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 1300 transitions. [2021-11-07 01:42:29,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:29,834 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1300 transitions. [2021-11-07 01:42:29,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:42:29,836 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:29,836 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:29,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:30,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:30,055 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 01:42:30,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:30,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1935086645, now seen corresponding path program 1 times [2021-11-07 01:42:30,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:30,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552650553] [2021-11-07 01:42:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:30,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:30,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:30,061 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:30,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:42:30,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:30,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:42:30,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:30,801 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 01:42:30,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:30,991 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 01:42:30,991 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:30,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552650553] [2021-11-07 01:42:30,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552650553] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:30,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:30,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:42:30,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5294174] [2021-11-07 01:42:30,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:42:30,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:30,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:42:30,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:42:30,995 INFO L87 Difference]: Start difference. First operand 748 states and 1300 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:31,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:31,121 INFO L93 Difference]: Finished difference Result 1493 states and 2597 transitions. [2021-11-07 01:42:31,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:42:31,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 01:42:31,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:31,128 INFO L225 Difference]: With dead ends: 1493 [2021-11-07 01:42:31,129 INFO L226 Difference]: Without dead ends: 753 [2021-11-07 01:42:31,130 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:42:31,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-11-07 01:42:31,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 748. [2021-11-07 01:42:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 742 states have (on average 1.747978436657682) internal successors, (1297), 747 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:31,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1297 transitions. [2021-11-07 01:42:31,194 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1297 transitions. Word has length 48 [2021-11-07 01:42:31,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:31,194 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 1297 transitions. [2021-11-07 01:42:31,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:31,196 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1297 transitions. [2021-11-07 01:42:31,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:42:31,198 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:31,198 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] [2021-11-07 01:42:31,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:31,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:31,414 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 01:42:31,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:31,415 INFO L85 PathProgramCache]: Analyzing trace with hash -907172448, now seen corresponding path program 1 times [2021-11-07 01:42:31,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:31,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072959391] [2021-11-07 01:42:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:31,416 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:31,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:31,418 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:31,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:42:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:31,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:42:31,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:32,149 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 01:42:32,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:32,331 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 01:42:32,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:32,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072959391] [2021-11-07 01:42:32,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072959391] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:32,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:32,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:42:32,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779094286] [2021-11-07 01:42:32,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:42:32,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:32,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:42:32,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:42:32,335 INFO L87 Difference]: Start difference. First operand 748 states and 1297 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:32,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:32,811 INFO L93 Difference]: Finished difference Result 2900 states and 5054 transitions. [2021-11-07 01:42:32,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:42:32,812 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 01:42:32,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:32,832 INFO L225 Difference]: With dead ends: 2900 [2021-11-07 01:42:32,832 INFO L226 Difference]: Without dead ends: 2178 [2021-11-07 01:42:32,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 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 01:42:32,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2021-11-07 01:42:32,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 748. [2021-11-07 01:42:32,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 742 states have (on average 1.743935309973046) internal successors, (1294), 747 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:32,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1294 transitions. [2021-11-07 01:42:32,936 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1294 transitions. Word has length 49 [2021-11-07 01:42:32,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:32,936 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 1294 transitions. [2021-11-07 01:42:32,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:32,937 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1294 transitions. [2021-11-07 01:42:32,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:42:32,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:32,940 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:32,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:33,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:33,154 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 01:42:33,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:33,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1665559579, now seen corresponding path program 1 times [2021-11-07 01:42:33,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:33,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673584592] [2021-11-07 01:42:33,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:33,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:33,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:33,159 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:33,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:42:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:33,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:33,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:33,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:34,050 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 01:42:34,050 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:34,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673584592] [2021-11-07 01:42:34,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673584592] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:34,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:34,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:42:34,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655063408] [2021-11-07 01:42:34,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:42:34,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:34,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:42:34,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:42:34,053 INFO L87 Difference]: Start difference. First operand 748 states and 1294 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:34,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:34,238 INFO L93 Difference]: Finished difference Result 1935 states and 3347 transitions. [2021-11-07 01:42:34,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:42:34,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 01:42:34,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:34,251 INFO L225 Difference]: With dead ends: 1935 [2021-11-07 01:42:34,251 INFO L226 Difference]: Without dead ends: 1470 [2021-11-07 01:42:34,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:42:34,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-11-07 01:42:34,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1005. [2021-11-07 01:42:34,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 999 states have (on average 1.7687687687687688) internal successors, (1767), 1004 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:34,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1767 transitions. [2021-11-07 01:42:34,343 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1767 transitions. Word has length 51 [2021-11-07 01:42:34,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:34,343 INFO L470 AbstractCegarLoop]: Abstraction has 1005 states and 1767 transitions. [2021-11-07 01:42:34,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:34,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1767 transitions. [2021-11-07 01:42:34,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:42:34,346 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:34,346 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:34,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:34,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:34,562 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 01:42:34,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:34,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1809467924, now seen corresponding path program 1 times [2021-11-07 01:42:34,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:34,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843319431] [2021-11-07 01:42:34,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:34,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:34,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:34,565 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:34,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:42:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:35,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:35,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:35,274 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 01:42:35,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:35,468 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 01:42:35,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:35,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843319431] [2021-11-07 01:42:35,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843319431] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:35,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:35,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:35,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343105770] [2021-11-07 01:42:35,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:35,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:35,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:35,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:35,472 INFO L87 Difference]: Start difference. First operand 1005 states and 1767 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:35,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:35,660 INFO L93 Difference]: Finished difference Result 2596 states and 4567 transitions. [2021-11-07 01:42:35,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:35,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 01:42:35,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:35,679 INFO L225 Difference]: With dead ends: 2596 [2021-11-07 01:42:35,679 INFO L226 Difference]: Without dead ends: 1675 [2021-11-07 01:42:35,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:35,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2021-11-07 01:42:35,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1210. [2021-11-07 01:42:35,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1204 states have (on average 1.7799003322259137) internal successors, (2143), 1209 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:35,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 2143 transitions. [2021-11-07 01:42:35,838 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 2143 transitions. Word has length 63 [2021-11-07 01:42:35,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:35,839 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 2143 transitions. [2021-11-07 01:42:35,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:35,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 2143 transitions. [2021-11-07 01:42:35,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:42:35,842 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:35,842 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:35,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:36,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:36,061 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 01:42:36,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:36,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1935027765, now seen corresponding path program 1 times [2021-11-07 01:42:36,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:36,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542640112] [2021-11-07 01:42:36,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:36,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:36,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:36,068 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:36,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:42:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:36,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:36,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:36,830 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 01:42:36,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:37,021 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 01:42:37,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:37,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542640112] [2021-11-07 01:42:37,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542640112] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:37,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:37,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:37,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910853412] [2021-11-07 01:42:37,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:37,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:37,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:37,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:37,042 INFO L87 Difference]: Start difference. First operand 1210 states and 2143 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:37,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:37,246 INFO L93 Difference]: Finished difference Result 3243 states and 5760 transitions. [2021-11-07 01:42:37,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:37,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 01:42:37,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:37,263 INFO L225 Difference]: With dead ends: 3243 [2021-11-07 01:42:37,263 INFO L226 Difference]: Without dead ends: 2125 [2021-11-07 01:42:37,268 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:37,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2021-11-07 01:42:37,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 1660. [2021-11-07 01:42:37,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1654 states have (on average 1.7962515114873034) internal successors, (2971), 1659 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:37,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 2971 transitions. [2021-11-07 01:42:37,451 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 2971 transitions. Word has length 64 [2021-11-07 01:42:37,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:37,452 INFO L470 AbstractCegarLoop]: Abstraction has 1660 states and 2971 transitions. [2021-11-07 01:42:37,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:37,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 2971 transitions. [2021-11-07 01:42:37,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:42:37,456 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:37,456 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 01:42:37,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:37,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:37,670 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 01:42:37,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:37,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1469160934, now seen corresponding path program 1 times [2021-11-07 01:42:37,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:37,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264866489] [2021-11-07 01:42:37,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:37,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:37,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:37,672 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:37,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:42:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:38,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:38,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:38,395 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 01:42:38,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:38,573 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 01:42:38,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:38,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264866489] [2021-11-07 01:42:38,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264866489] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:38,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:38,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:38,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358965848] [2021-11-07 01:42:38,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:38,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:38,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:38,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:38,577 INFO L87 Difference]: Start difference. First operand 1660 states and 2971 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:38,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:38,840 INFO L93 Difference]: Finished difference Result 4573 states and 8213 transitions. [2021-11-07 01:42:38,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:38,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:42:38,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:38,865 INFO L225 Difference]: With dead ends: 4573 [2021-11-07 01:42:38,865 INFO L226 Difference]: Without dead ends: 3013 [2021-11-07 01:42:38,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:38,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3013 states. [2021-11-07 01:42:39,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3013 to 2548. [2021-11-07 01:42:39,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2548 states, 2542 states have (on average 1.8119590873328089) internal successors, (4606), 2547 states have internal predecessors, (4606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:39,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 4606 transitions. [2021-11-07 01:42:39,079 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 4606 transitions. Word has length 65 [2021-11-07 01:42:39,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:39,079 INFO L470 AbstractCegarLoop]: Abstraction has 2548 states and 4606 transitions. [2021-11-07 01:42:39,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:39,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 4606 transitions. [2021-11-07 01:42:39,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:42:39,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:39,085 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 01:42:39,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:39,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:39,304 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 01:42:39,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:39,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1618263962, now seen corresponding path program 1 times [2021-11-07 01:42:39,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:39,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648749957] [2021-11-07 01:42:39,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:39,306 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:39,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:39,307 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:39,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:42:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:39,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:39,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:40,142 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 01:42:40,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:40,348 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 01:42:40,349 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:40,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648749957] [2021-11-07 01:42:40,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [648749957] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:40,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:40,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:40,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473889994] [2021-11-07 01:42:40,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:40,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:40,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:40,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:40,351 INFO L87 Difference]: Start difference. First operand 2548 states and 4606 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:40,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:40,712 INFO L93 Difference]: Finished difference Result 6973 states and 12637 transitions. [2021-11-07 01:42:40,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:40,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:42:40,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:40,750 INFO L225 Difference]: With dead ends: 6973 [2021-11-07 01:42:40,750 INFO L226 Difference]: Without dead ends: 4559 [2021-11-07 01:42:40,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:40,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4559 states. [2021-11-07 01:42:41,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4559 to 4094. [2021-11-07 01:42:41,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4094 states, 4088 states have (on average 1.822651663405088) internal successors, (7451), 4093 states have internal predecessors, (7451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:41,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4094 states to 4094 states and 7451 transitions. [2021-11-07 01:42:41,143 INFO L78 Accepts]: Start accepts. Automaton has 4094 states and 7451 transitions. Word has length 66 [2021-11-07 01:42:41,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:41,144 INFO L470 AbstractCegarLoop]: Abstraction has 4094 states and 7451 transitions. [2021-11-07 01:42:41,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:41,144 INFO L276 IsEmpty]: Start isEmpty. Operand 4094 states and 7451 transitions. [2021-11-07 01:42:41,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:42:41,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:41,151 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:41,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:41,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:41,369 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 01:42:41,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:41,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1267895221, now seen corresponding path program 1 times [2021-11-07 01:42:41,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:41,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918138198] [2021-11-07 01:42:41,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:41,371 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:41,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:41,372 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:41,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:42:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:42,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:42,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:42,165 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 01:42:42,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:42,348 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 01:42:42,348 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:42,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918138198] [2021-11-07 01:42:42,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918138198] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:42,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:42,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:42,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230642742] [2021-11-07 01:42:42,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:42,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:42,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:42,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:42,350 INFO L87 Difference]: Start difference. First operand 4094 states and 7451 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:42,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:42,832 INFO L93 Difference]: Finished difference Result 11327 states and 20655 transitions. [2021-11-07 01:42:42,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:42,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:42:42,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:42,874 INFO L225 Difference]: With dead ends: 11327 [2021-11-07 01:42:42,874 INFO L226 Difference]: Without dead ends: 7401 [2021-11-07 01:42:42,881 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:42,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7401 states. [2021-11-07 01:42:43,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7401 to 6936. [2021-11-07 01:42:43,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6936 states, 6930 states have (on average 1.8291486291486292) internal successors, (12676), 6935 states have internal predecessors, (12676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:43,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6936 states to 6936 states and 12676 transitions. [2021-11-07 01:42:43,457 INFO L78 Accepts]: Start accepts. Automaton has 6936 states and 12676 transitions. Word has length 67 [2021-11-07 01:42:43,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:43,458 INFO L470 AbstractCegarLoop]: Abstraction has 6936 states and 12676 transitions. [2021-11-07 01:42:43,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 6936 states and 12676 transitions. [2021-11-07 01:42:43,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:42:43,465 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:43,466 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 01:42:43,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:43,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:43,684 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 01:42:43,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:43,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1071444139, now seen corresponding path program 1 times [2021-11-07 01:42:43,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:43,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583426498] [2021-11-07 01:42:43,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:43,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:43,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:43,688 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:43,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:42:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:44,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:44,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:44,597 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 01:42:44,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:44,873 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 01:42:44,873 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:44,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1583426498] [2021-11-07 01:42:44,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1583426498] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:44,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:44,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:44,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181922882] [2021-11-07 01:42:44,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:44,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:44,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:44,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:44,875 INFO L87 Difference]: Start difference. First operand 6936 states and 12676 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:45,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:45,597 INFO L93 Difference]: Finished difference Result 20311 states and 37172 transitions. [2021-11-07 01:42:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:45,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:42:45,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:45,656 INFO L225 Difference]: With dead ends: 20311 [2021-11-07 01:42:45,657 INFO L226 Difference]: Without dead ends: 13547 [2021-11-07 01:42:45,669 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:45,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13547 states. [2021-11-07 01:42:46,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13547 to 13082. [2021-11-07 01:42:46,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13082 states, 13076 states have (on average 1.8321352095442032) internal successors, (23957), 13081 states have internal predecessors, (23957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:46,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13082 states to 13082 states and 23957 transitions. [2021-11-07 01:42:46,641 INFO L78 Accepts]: Start accepts. Automaton has 13082 states and 23957 transitions. Word has length 68 [2021-11-07 01:42:46,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:46,641 INFO L470 AbstractCegarLoop]: Abstraction has 13082 states and 23957 transitions. [2021-11-07 01:42:46,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:46,642 INFO L276 IsEmpty]: Start isEmpty. Operand 13082 states and 23957 transitions. [2021-11-07 01:42:46,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:42:46,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:46,652 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:46,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:46,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:46,854 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 01:42:46,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:46,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1651109189, now seen corresponding path program 1 times [2021-11-07 01:42:46,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:46,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571176622] [2021-11-07 01:42:46,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:46,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:46,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:46,858 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:46,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:42:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:47,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:42:47,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:42:47,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:42:48,078 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:48,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571176622] [2021-11-07 01:42:48,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571176622] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:48,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:48,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:42:48,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960398581] [2021-11-07 01:42:48,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:42:48,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:48,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:42:48,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:42:48,080 INFO L87 Difference]: Start difference. First operand 13082 states and 23957 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:51,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:51,535 INFO L93 Difference]: Finished difference Result 32415 states and 59362 transitions. [2021-11-07 01:42:51,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:42:51,536 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 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 01:42:51,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:51,624 INFO L225 Difference]: With dead ends: 32415 [2021-11-07 01:42:51,625 INFO L226 Difference]: Without dead ends: 19626 [2021-11-07 01:42:51,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:42:51,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19626 states. [2021-11-07 01:42:52,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19626 to 13049. [2021-11-07 01:42:52,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13049 states, 13043 states have (on average 1.8266503105113854) internal successors, (23825), 13048 states have internal predecessors, (23825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:52,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13049 states to 13049 states and 23825 transitions. [2021-11-07 01:42:52,627 INFO L78 Accepts]: Start accepts. Automaton has 13049 states and 23825 transitions. Word has length 69 [2021-11-07 01:42:52,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:52,627 INFO L470 AbstractCegarLoop]: Abstraction has 13049 states and 23825 transitions. [2021-11-07 01:42:52,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:52,629 INFO L276 IsEmpty]: Start isEmpty. Operand 13049 states and 23825 transitions. [2021-11-07 01:42:52,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:42:52,639 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:52,639 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 01:42:52,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:42:52,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:52,860 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 01:42:52,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:52,861 INFO L85 PathProgramCache]: Analyzing trace with hash -756825286, now seen corresponding path program 1 times [2021-11-07 01:42:52,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:52,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870474238] [2021-11-07 01:42:52,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:52,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:52,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:52,862 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:52,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:42:53,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:53,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:53,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:53,835 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 01:42:53,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:54,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:54,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870474238] [2021-11-07 01:42:54,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [870474238] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:54,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:54,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:54,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609813681] [2021-11-07 01:42:54,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:54,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:54,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:54,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:54,072 INFO L87 Difference]: Start difference. First operand 13049 states and 23825 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:55,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:55,164 INFO L93 Difference]: Finished difference Result 38354 states and 70102 transitions. [2021-11-07 01:42:55,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:55,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:42:55,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:55,253 INFO L225 Difference]: With dead ends: 38354 [2021-11-07 01:42:55,253 INFO L226 Difference]: Without dead ends: 25484 [2021-11-07 01:42:55,278 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:55,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25484 states. [2021-11-07 01:42:56,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25484 to 25019. [2021-11-07 01:42:56,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25019 states, 25013 states have (on average 1.8276096429856474) internal successors, (45714), 25018 states have internal predecessors, (45714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:57,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25019 states to 25019 states and 45714 transitions. [2021-11-07 01:42:57,039 INFO L78 Accepts]: Start accepts. Automaton has 25019 states and 45714 transitions. Word has length 69 [2021-11-07 01:42:57,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:57,039 INFO L470 AbstractCegarLoop]: Abstraction has 25019 states and 45714 transitions. [2021-11-07 01:42:57,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:57,040 INFO L276 IsEmpty]: Start isEmpty. Operand 25019 states and 45714 transitions. [2021-11-07 01:42:57,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:42:57,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:57,050 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 01:42:57,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:57,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:57,266 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 01:42:57,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:57,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1922087021, now seen corresponding path program 1 times [2021-11-07 01:42:57,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:57,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285922525] [2021-11-07 01:42:57,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:57,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:57,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:57,268 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:57,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:42:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:58,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:58,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:58,237 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 01:42:58,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:58,449 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 01:42:58,449 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:58,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285922525] [2021-11-07 01:42:58,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285922525] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:58,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:58,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:58,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637777023] [2021-11-07 01:42:58,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:58,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:58,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:58,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:58,451 INFO L87 Difference]: Start difference. First operand 25019 states and 45714 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:00,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:00,515 INFO L93 Difference]: Finished difference Result 68903 states and 125505 transitions. [2021-11-07 01:43:00,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:00,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:43:00,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:00,642 INFO L225 Difference]: With dead ends: 68903 [2021-11-07 01:43:00,642 INFO L226 Difference]: Without dead ends: 44110 [2021-11-07 01:43:00,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:00,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44110 states. [2021-11-07 01:43:03,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44110 to 43645. [2021-11-07 01:43:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43645 states, 43639 states have (on average 1.8160590297669517) internal successors, (79251), 43644 states have internal predecessors, (79251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:03,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43645 states to 43645 states and 79251 transitions. [2021-11-07 01:43:03,421 INFO L78 Accepts]: Start accepts. Automaton has 43645 states and 79251 transitions. Word has length 70 [2021-11-07 01:43:03,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:03,422 INFO L470 AbstractCegarLoop]: Abstraction has 43645 states and 79251 transitions. [2021-11-07 01:43:03,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:03,422 INFO L276 IsEmpty]: Start isEmpty. Operand 43645 states and 79251 transitions. [2021-11-07 01:43:03,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:43:03,431 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:03,432 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:03,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:03,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:03,646 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 01:43:03,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:03,646 INFO L85 PathProgramCache]: Analyzing trace with hash -2143761535, now seen corresponding path program 1 times [2021-11-07 01:43:03,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:03,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206781117] [2021-11-07 01:43:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:03,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:03,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:03,649 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:03,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:43:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:04,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:43:04,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:04,709 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 01:43:04,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:05,123 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 01:43:05,123 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:05,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206781117] [2021-11-07 01:43:05,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206781117] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:05,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:05,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:43:05,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695962366] [2021-11-07 01:43:05,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:43:05,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:05,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:43:05,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:43:05,127 INFO L87 Difference]: Start difference. First operand 43645 states and 79251 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:12,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:12,741 INFO L93 Difference]: Finished difference Result 169860 states and 308326 transitions. [2021-11-07 01:43:12,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:43:12,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:43:12,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:13,161 INFO L225 Difference]: With dead ends: 169860 [2021-11-07 01:43:13,161 INFO L226 Difference]: Without dead ends: 126507 [2021-11-07 01:43:13,198 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 136 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 01:43:13,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126507 states. [2021-11-07 01:43:16,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126507 to 43387. [2021-11-07 01:43:16,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43387 states, 43381 states have (on average 1.803070468638344) internal successors, (78219), 43386 states have internal predecessors, (78219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:16,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43387 states to 43387 states and 78219 transitions. [2021-11-07 01:43:16,845 INFO L78 Accepts]: Start accepts. Automaton has 43387 states and 78219 transitions. Word has length 71 [2021-11-07 01:43:16,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:16,846 INFO L470 AbstractCegarLoop]: Abstraction has 43387 states and 78219 transitions. [2021-11-07 01:43:16,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:16,846 INFO L276 IsEmpty]: Start isEmpty. Operand 43387 states and 78219 transitions. [2021-11-07 01:43:16,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:43:16,855 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:16,855 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:16,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:17,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:17,070 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 01:43:17,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:17,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1823842335, now seen corresponding path program 1 times [2021-11-07 01:43:17,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:17,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724376555] [2021-11-07 01:43:17,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:17,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:17,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:17,072 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:17,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:43:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:17,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:43:17,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:18,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:18,202 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:18,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724376555] [2021-11-07 01:43:18,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724376555] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:18,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:18,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:43:18,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077275874] [2021-11-07 01:43:18,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:18,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:18,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:18,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:18,205 INFO L87 Difference]: Start difference. First operand 43387 states and 78219 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:20,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:20,637 INFO L93 Difference]: Finished difference Result 86941 states and 156725 transitions. [2021-11-07 01:43:20,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:20,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:43:20,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:20,729 INFO L225 Difference]: With dead ends: 86941 [2021-11-07 01:43:20,729 INFO L226 Difference]: Without dead ends: 43852 [2021-11-07 01:43:20,769 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 138 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 01:43:20,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43852 states. [2021-11-07 01:43:23,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43852 to 43387. [2021-11-07 01:43:23,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43387 states, 43381 states have (on average 1.8001198681450405) internal successors, (78091), 43386 states have internal predecessors, (78091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43387 states to 43387 states and 78091 transitions. [2021-11-07 01:43:23,477 INFO L78 Accepts]: Start accepts. Automaton has 43387 states and 78091 transitions. Word has length 71 [2021-11-07 01:43:23,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:23,477 INFO L470 AbstractCegarLoop]: Abstraction has 43387 states and 78091 transitions. [2021-11-07 01:43:23,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:23,477 INFO L276 IsEmpty]: Start isEmpty. Operand 43387 states and 78091 transitions. [2021-11-07 01:43:23,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:43:23,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:23,489 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:23,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:23,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:23,703 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 01:43:23,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:23,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1698605940, now seen corresponding path program 1 times [2021-11-07 01:43:23,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:23,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315827710] [2021-11-07 01:43:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:23,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:23,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:23,705 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:23,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb64af10-dc11-4169-a87e-db6e69d32756/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:43:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:24,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:43:24,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:24,599 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 01:43:24,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:24,784 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 01:43:24,784 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:24,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315827710] [2021-11-07 01:43:24,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315827710] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:24,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:24,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:24,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615358848] [2021-11-07 01:43:24,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:43:24,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:24,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:43:24,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:24,789 INFO L87 Difference]: Start difference. First operand 43387 states and 78091 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:28,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:28,058 INFO L93 Difference]: Finished difference Result 121671 states and 218751 transitions. [2021-11-07 01:43:28,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:28,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:43:28,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:28,192 INFO L225 Difference]: With dead ends: 121671 [2021-11-07 01:43:28,192 INFO L226 Difference]: Without dead ends: 78542 [2021-11-07 01:43:28,226 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:28,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78542 states.