./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec4_product35.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_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/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_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product35.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/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_63812852-9f13-4ea6-9541-09fc49ac383f/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 0684811b66680ff9a661ea21879b3502eab6dd1ae141cb77fa167c05dd5b0ff9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:58:05,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:58:05,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:58:05,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:58:05,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:58:05,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:58:05,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:58:05,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:58:05,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:58:05,136 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:58:05,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:58:05,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:58:05,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:58:05,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:58:05,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:58:05,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:58:05,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:58:05,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:58:05,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:58:05,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:58:05,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:58:05,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:58:05,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:58:05,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:58:05,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:58:05,194 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:58:05,195 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:58:05,197 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:58:05,198 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:58:05,200 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:58:05,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:58:05,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:58:05,206 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:58:05,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:58:05,209 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:58:05,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:58:05,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:58:05,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:58:05,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:58:05,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:58:05,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:58:05,215 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:58:05,259 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:58:05,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:58:05,261 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:58:05,261 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:58:05,261 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:58:05,262 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:58:05,262 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:58:05,262 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:58:05,262 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:58:05,263 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:58:05,263 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:58:05,263 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:58:05,264 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:58:05,264 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:58:05,264 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:58:05,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:58:05,265 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:58:05,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:58:05,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:58:05,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:58:05,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:58:05,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:58:05,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:58:05,267 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:58:05,268 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:58:05,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:58:05,268 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:58:05,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:58:05,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:58:05,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:58:05,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:58:05,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:58:05,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:58:05,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:58:05,270 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:58:05,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:58:05,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:58:05,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:58:05,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:58:05,272 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_63812852-9f13-4ea6-9541-09fc49ac383f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0684811b66680ff9a661ea21879b3502eab6dd1ae141cb77fa167c05dd5b0ff9 [2021-11-07 01:58:05,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:58:05,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:58:05,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:58:05,699 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:58:05,700 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:58:05,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec4_product35.cil.c [2021-11-07 01:58:05,796 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/data/9b983b3c2/c427ea1285b74bef85bd573e977ef9cf/FLAG82aa2b662 [2021-11-07 01:58:06,608 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:58:06,612 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/sv-benchmarks/c/product-lines/email_spec4_product35.cil.c [2021-11-07 01:58:06,659 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/data/9b983b3c2/c427ea1285b74bef85bd573e977ef9cf/FLAG82aa2b662 [2021-11-07 01:58:06,773 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/data/9b983b3c2/c427ea1285b74bef85bd573e977ef9cf [2021-11-07 01:58:06,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:58:06,781 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:58:06,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:58:06,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:58:06,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:58:06,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:06" (1/1) ... [2021-11-07 01:58:06,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63cb6f6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:06, skipping insertion in model container [2021-11-07 01:58:06,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:06" (1/1) ... [2021-11-07 01:58:06,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:58:06,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:58:07,189 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_63812852-9f13-4ea6-9541-09fc49ac383f/sv-benchmarks/c/product-lines/email_spec4_product35.cil.c[1542,1555] [2021-11-07 01:58:07,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:58:07,781 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 01:58:07,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@46c05aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:07, skipping insertion in model container [2021-11-07 01:58:07,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:58:07,783 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:58:07,786 INFO L168 Benchmark]: Toolchain (without parser) took 1003.23 ms. Allocated memory is still 104.9 MB. Free memory was 60.4 MB in the beginning and 65.4 MB in the end (delta: -5.0 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:58:07,787 INFO L168 Benchmark]: CDTParser took 1.13 ms. Allocated memory is still 104.9 MB. Free memory is still 80.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:58:07,788 INFO L168 Benchmark]: CACSL2BoogieTranslator took 997.28 ms. Allocated memory is still 104.9 MB. Free memory was 60.2 MB in the beginning and 65.4 MB in the end (delta: -5.2 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:58:07,790 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.13 ms. Allocated memory is still 104.9 MB. Free memory is still 80.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 997.28 ms. Allocated memory is still 104.9 MB. Free memory was 60.2 MB in the beginning and 65.4 MB in the end (delta: -5.2 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2016]: 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_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/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_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product35.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/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_63812852-9f13-4ea6-9541-09fc49ac383f/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 0684811b66680ff9a661ea21879b3502eab6dd1ae141cb77fa167c05dd5b0ff9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:58:10,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:58:10,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:58:10,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:58:10,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:58:10,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:58:10,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:58:10,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:58:10,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:58:10,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:58:10,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:58:10,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:58:10,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:58:10,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:58:10,945 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:58:10,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:58:10,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:58:10,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:58:10,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:58:10,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:58:10,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:58:10,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:58:10,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:58:10,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:58:11,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:58:11,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:58:11,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:58:11,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:58:11,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:58:11,015 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:58:11,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:58:11,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:58:11,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:58:11,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:58:11,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:58:11,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:58:11,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:58:11,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:58:11,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:58:11,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:58:11,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:58:11,032 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:58:11,092 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:58:11,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:58:11,095 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:58:11,095 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:58:11,096 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:58:11,096 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:58:11,096 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:58:11,097 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:58:11,097 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:58:11,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:58:11,101 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:58:11,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:58:11,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:58:11,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:58:11,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:58:11,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:58:11,103 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:58:11,103 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:58:11,103 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:58:11,104 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:58:11,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:58:11,104 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:58:11,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:58:11,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:58:11,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:58:11,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:58:11,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:58:11,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:58:11,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:58:11,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:58:11,107 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:58:11,108 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:11,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:58:11,108 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:58:11,109 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:58:11,109 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_63812852-9f13-4ea6-9541-09fc49ac383f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0684811b66680ff9a661ea21879b3502eab6dd1ae141cb77fa167c05dd5b0ff9 [2021-11-07 01:58:11,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:58:11,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:58:11,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:58:11,668 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:58:11,670 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:58:11,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec4_product35.cil.c [2021-11-07 01:58:11,781 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/data/711c998bd/b68058de37b64776b2592e227bc9bb7d/FLAGebde869fe [2021-11-07 01:58:12,755 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:58:12,756 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/sv-benchmarks/c/product-lines/email_spec4_product35.cil.c [2021-11-07 01:58:12,801 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/data/711c998bd/b68058de37b64776b2592e227bc9bb7d/FLAGebde869fe [2021-11-07 01:58:12,850 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/data/711c998bd/b68058de37b64776b2592e227bc9bb7d [2021-11-07 01:58:12,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:58:12,857 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:58:12,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:58:12,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:58:12,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:58:12,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:12" (1/1) ... [2021-11-07 01:58:12,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16d46210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:12, skipping insertion in model container [2021-11-07 01:58:12,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:12" (1/1) ... [2021-11-07 01:58:12,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:58:12,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:58:13,258 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_63812852-9f13-4ea6-9541-09fc49ac383f/sv-benchmarks/c/product-lines/email_spec4_product35.cil.c[1542,1555] [2021-11-07 01:58:13,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:58:13,980 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:58:14,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:58:14,022 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_63812852-9f13-4ea6-9541-09fc49ac383f/sv-benchmarks/c/product-lines/email_spec4_product35.cil.c[1542,1555] [2021-11-07 01:58:14,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:58:14,193 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:58:14,211 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_63812852-9f13-4ea6-9541-09fc49ac383f/sv-benchmarks/c/product-lines/email_spec4_product35.cil.c[1542,1555] [2021-11-07 01:58:14,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:58:14,447 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:58:14,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:14 WrapperNode [2021-11-07 01:58:14,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:58:14,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:58:14,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:58:14,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:58:14,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:14" (1/1) ... [2021-11-07 01:58:14,509 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:14" (1/1) ... [2021-11-07 01:58:14,758 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:58:14,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:58:14,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:58:14,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:58:14,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:14" (1/1) ... [2021-11-07 01:58:14,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:14" (1/1) ... [2021-11-07 01:58:14,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:14" (1/1) ... [2021-11-07 01:58:14,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:14" (1/1) ... [2021-11-07 01:58:14,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:14" (1/1) ... [2021-11-07 01:58:15,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:14" (1/1) ... [2021-11-07 01:58:15,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:14" (1/1) ... [2021-11-07 01:58:15,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:58:15,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:58:15,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:58:15,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:58:15,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:14" (1/1) ... [2021-11-07 01:58:15,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:58:15,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:58:15,169 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:58:15,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:58:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:58:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:58:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:58:15,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:58:15,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:58:23,043 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:58:23,044 INFO L299 CfgBuilder]: Removed 925 assume(true) statements. [2021-11-07 01:58:23,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:58:23 BoogieIcfgContainer [2021-11-07 01:58:23,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:58:23,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:58:23,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:58:23,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:58:23,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:58:12" (1/3) ... [2021-11-07 01:58:23,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ca8f7d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:58:23, skipping insertion in model container [2021-11-07 01:58:23,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:14" (2/3) ... [2021-11-07 01:58:23,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ca8f7d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:58:23, skipping insertion in model container [2021-11-07 01:58:23,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:58:23" (3/3) ... [2021-11-07 01:58:23,061 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec4_product35.cil.c [2021-11-07 01:58:23,068 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:58:23,069 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:58:23,142 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:58:23,153 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 01:58:23,153 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:58:23,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 1342 states, 1335 states have (on average 1.7235955056179775) internal successors, (2301), 1341 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:23,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:58:23,232 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:23,233 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:23,234 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 01:58:23,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:23,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1869304248, now seen corresponding path program 1 times [2021-11-07 01:58:23,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:23,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815783881] [2021-11-07 01:58:23,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:23,260 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:23,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:23,270 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:23,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:58:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:23,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:58:23,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:24,141 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 01:58:24,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:24,342 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 01:58:24,343 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:24,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815783881] [2021-11-07 01:58:24,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815783881] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:24,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:24,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:58:24,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694984423] [2021-11-07 01:58:24,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:58:24,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:24,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:58:24,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:58:24,376 INFO L87 Difference]: Start difference. First operand has 1342 states, 1335 states have (on average 1.7235955056179775) internal successors, (2301), 1341 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:24,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:24,493 INFO L93 Difference]: Finished difference Result 2395 states and 4072 transitions. [2021-11-07 01:58:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:58:24,495 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 01:58:24,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:24,530 INFO L225 Difference]: With dead ends: 2395 [2021-11-07 01:58:24,530 INFO L226 Difference]: Without dead ends: 1104 [2021-11-07 01:58:24,542 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 98 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 01:58:24,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-11-07 01:58:24,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1104. [2021-11-07 01:58:24,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1098 states have (on average 1.726775956284153) internal successors, (1896), 1103 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:24,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1896 transitions. [2021-11-07 01:58:24,693 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1896 transitions. Word has length 50 [2021-11-07 01:58:24,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:24,694 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 1896 transitions. [2021-11-07 01:58:24,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:24,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1896 transitions. [2021-11-07 01:58:24,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:58:24,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:24,707 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 01:58:24,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:24,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:24,925 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 01:58:24,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:24,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1980267021, now seen corresponding path program 1 times [2021-11-07 01:58:24,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:24,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825759917] [2021-11-07 01:58:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:24,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:24,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:24,931 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:24,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:58:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:25,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:58:25,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:25,726 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 01:58:25,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:25,929 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 01:58:25,930 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:25,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825759917] [2021-11-07 01:58:25,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825759917] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:25,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:25,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:58:25,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112533037] [2021-11-07 01:58:25,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:58:25,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:25,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:58:25,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:58:25,942 INFO L87 Difference]: Start difference. First operand 1104 states and 1896 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:26,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:26,173 INFO L93 Difference]: Finished difference Result 3282 states and 5640 transitions. [2021-11-07 01:58:26,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:58:26,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 01:58:26,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:26,195 INFO L225 Difference]: With dead ends: 3282 [2021-11-07 01:58:26,195 INFO L226 Difference]: Without dead ends: 2193 [2021-11-07 01:58:26,199 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 01:58:26,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2021-11-07 01:58:26,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 1103. [2021-11-07 01:58:26,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1097 states have (on average 1.723792160437557) internal successors, (1891), 1102 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:26,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1891 transitions. [2021-11-07 01:58:26,319 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1891 transitions. Word has length 51 [2021-11-07 01:58:26,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:26,320 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 1891 transitions. [2021-11-07 01:58:26,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:26,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1891 transitions. [2021-11-07 01:58:26,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:58:26,324 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:26,324 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] [2021-11-07 01:58:26,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:26,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:26,534 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 01:58:26,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:26,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1285101607, now seen corresponding path program 1 times [2021-11-07 01:58:26,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:26,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058711373] [2021-11-07 01:58:26,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:26,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:26,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:26,539 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:26,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:58:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:27,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:58:27,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:27,311 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 01:58:27,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:27,526 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 01:58:27,526 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:27,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058711373] [2021-11-07 01:58:27,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058711373] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:27,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:27,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:58:27,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099111501] [2021-11-07 01:58:27,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:58:27,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:27,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:58:27,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:58:27,530 INFO L87 Difference]: Start difference. First operand 1103 states and 1891 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:28,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:28,025 INFO L93 Difference]: Finished difference Result 4329 states and 7426 transitions. [2021-11-07 01:58:28,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:58:28,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 01:58:28,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:28,050 INFO L225 Difference]: With dead ends: 4329 [2021-11-07 01:58:28,050 INFO L226 Difference]: Without dead ends: 3244 [2021-11-07 01:58:28,053 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 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 01:58:28,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2021-11-07 01:58:28,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1102. [2021-11-07 01:58:28,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1096 states have (on average 1.7217153284671534) internal successors, (1887), 1101 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:28,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1887 transitions. [2021-11-07 01:58:28,147 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1887 transitions. Word has length 53 [2021-11-07 01:58:28,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:28,148 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1887 transitions. [2021-11-07 01:58:28,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:28,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1887 transitions. [2021-11-07 01:58:28,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:58:28,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:28,150 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:28,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:28,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:28,365 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 01:58:28,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:28,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1639187116, now seen corresponding path program 1 times [2021-11-07 01:58:28,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:28,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811714479] [2021-11-07 01:58:28,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:28,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:28,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:28,370 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:28,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:58:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:28,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:58:28,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:29,053 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 01:58:29,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:29,233 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 01:58:29,233 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:29,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811714479] [2021-11-07 01:58:29,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811714479] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:29,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:29,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:58:29,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025920369] [2021-11-07 01:58:29,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:58:29,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:29,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:58:29,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:58:29,237 INFO L87 Difference]: Start difference. First operand 1102 states and 1887 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:29,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:29,402 INFO L93 Difference]: Finished difference Result 2201 states and 3771 transitions. [2021-11-07 01:58:29,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:58:29,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 01:58:29,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:29,410 INFO L225 Difference]: With dead ends: 2201 [2021-11-07 01:58:29,411 INFO L226 Difference]: Without dead ends: 1107 [2021-11-07 01:58:29,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:58:29,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-11-07 01:58:29,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1102. [2021-11-07 01:58:29,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1096 states have (on average 1.718978102189781) internal successors, (1884), 1101 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:29,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1884 transitions. [2021-11-07 01:58:29,487 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1884 transitions. Word has length 54 [2021-11-07 01:58:29,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:29,489 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1884 transitions. [2021-11-07 01:58:29,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:29,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1884 transitions. [2021-11-07 01:58:29,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:58:29,492 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:29,492 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:29,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:29,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:29,709 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 01:58:29,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:29,709 INFO L85 PathProgramCache]: Analyzing trace with hash 5851329, now seen corresponding path program 1 times [2021-11-07 01:58:29,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:29,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1027869477] [2021-11-07 01:58:29,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:29,711 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:29,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:29,712 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:29,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:58:30,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:30,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:58:30,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:30,481 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 01:58:30,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:30,671 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 01:58:30,671 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:30,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1027869477] [2021-11-07 01:58:30,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1027869477] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:30,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:30,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:58:30,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762042620] [2021-11-07 01:58:30,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:58:30,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:30,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:58:30,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:58:30,674 INFO L87 Difference]: Start difference. First operand 1102 states and 1884 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:31,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:31,276 INFO L93 Difference]: Finished difference Result 4316 states and 7402 transitions. [2021-11-07 01:58:31,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:58:31,277 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:58:31,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:31,301 INFO L225 Difference]: With dead ends: 4316 [2021-11-07 01:58:31,301 INFO L226 Difference]: Without dead ends: 3240 [2021-11-07 01:58:31,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 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 01:58:31,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3240 states. [2021-11-07 01:58:31,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3240 to 1102. [2021-11-07 01:58:31,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1096 states have (on average 1.7162408759124088) internal successors, (1881), 1101 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:31,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1881 transitions. [2021-11-07 01:58:31,430 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1881 transitions. Word has length 55 [2021-11-07 01:58:31,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:31,431 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1881 transitions. [2021-11-07 01:58:31,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:31,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1881 transitions. [2021-11-07 01:58:31,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:58:31,434 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:31,434 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] [2021-11-07 01:58:31,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:31,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:31,651 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 01:58:31,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:31,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1272707332, now seen corresponding path program 1 times [2021-11-07 01:58:31,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:31,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010538732] [2021-11-07 01:58:31,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:31,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:31,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:31,655 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:31,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:58:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:32,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:32,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:32,431 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 01:58:32,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:32,601 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:32,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010538732] [2021-11-07 01:58:32,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010538732] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:32,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:32,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:58:32,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930434960] [2021-11-07 01:58:32,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:58:32,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:32,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:58:32,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:58:32,604 INFO L87 Difference]: Start difference. First operand 1102 states and 1881 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:32,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:32,888 INFO L93 Difference]: Finished difference Result 2993 states and 5101 transitions. [2021-11-07 01:58:32,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:58:32,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:58:32,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:32,904 INFO L225 Difference]: With dead ends: 2993 [2021-11-07 01:58:32,905 INFO L226 Difference]: Without dead ends: 2178 [2021-11-07 01:58:32,908 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 110 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 01:58:32,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2021-11-07 01:58:33,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 1363. [2021-11-07 01:58:33,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1357 states have (on average 1.739867354458364) internal successors, (2361), 1362 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:33,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 2361 transitions. [2021-11-07 01:58:33,044 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 2361 transitions. Word has length 57 [2021-11-07 01:58:33,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:33,044 INFO L470 AbstractCegarLoop]: Abstraction has 1363 states and 2361 transitions. [2021-11-07 01:58:33,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:33,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 2361 transitions. [2021-11-07 01:58:33,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:58:33,047 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:33,047 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 01:58:33,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:33,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:33,262 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 01:58:33,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:33,262 INFO L85 PathProgramCache]: Analyzing trace with hash 214846701, now seen corresponding path program 1 times [2021-11-07 01:58:33,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:33,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456758281] [2021-11-07 01:58:33,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:33,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:33,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:33,265 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:33,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:58:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:33,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:33,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:33,995 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 01:58:33,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:34,197 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 01:58:34,197 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:34,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456758281] [2021-11-07 01:58:34,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456758281] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:34,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:34,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:58:34,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797309064] [2021-11-07 01:58:34,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:34,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:34,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:34,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:34,200 INFO L87 Difference]: Start difference. First operand 1363 states and 2361 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 01:58:34,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:34,434 INFO L93 Difference]: Finished difference Result 3666 states and 6342 transitions. [2021-11-07 01:58:34,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:34,435 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 01:58:34,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:34,452 INFO L225 Difference]: With dead ends: 3666 [2021-11-07 01:58:34,453 INFO L226 Difference]: Without dead ends: 2387 [2021-11-07 01:58:34,457 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 01:58:34,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2021-11-07 01:58:34,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 1572. [2021-11-07 01:58:34,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1566 states have (on average 1.752234993614304) internal successors, (2744), 1571 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:34,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 2744 transitions. [2021-11-07 01:58:34,611 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 2744 transitions. Word has length 69 [2021-11-07 01:58:34,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:34,612 INFO L470 AbstractCegarLoop]: Abstraction has 1572 states and 2744 transitions. [2021-11-07 01:58:34,612 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 01:58:34,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 2744 transitions. [2021-11-07 01:58:34,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:58:34,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:34,616 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 01:58:34,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:34,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:34,836 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 01:58:34,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:34,837 INFO L85 PathProgramCache]: Analyzing trace with hash -283130484, now seen corresponding path program 1 times [2021-11-07 01:58:34,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:34,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047199586] [2021-11-07 01:58:34,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:34,839 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:34,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:34,840 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:34,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:58:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:35,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:35,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:35,647 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 01:58:35,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:35,852 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 01:58:35,852 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:35,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047199586] [2021-11-07 01:58:35,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047199586] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:35,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:35,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:58:35,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089908533] [2021-11-07 01:58:35,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:35,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:35,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:35,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:35,855 INFO L87 Difference]: Start difference. First operand 1572 states and 2744 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 01:58:36,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:36,111 INFO L93 Difference]: Finished difference Result 4325 states and 7556 transitions. [2021-11-07 01:58:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:36,112 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 01:58:36,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:36,133 INFO L225 Difference]: With dead ends: 4325 [2021-11-07 01:58:36,133 INFO L226 Difference]: Without dead ends: 2845 [2021-11-07 01:58:36,139 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 01:58:36,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2021-11-07 01:58:36,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2030. [2021-11-07 01:58:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2024 states have (on average 1.7717391304347827) internal successors, (3586), 2029 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:36,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 3586 transitions. [2021-11-07 01:58:36,330 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 3586 transitions. Word has length 70 [2021-11-07 01:58:36,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:36,330 INFO L470 AbstractCegarLoop]: Abstraction has 2030 states and 3586 transitions. [2021-11-07 01:58:36,331 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 01:58:36,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 3586 transitions. [2021-11-07 01:58:36,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:58:36,335 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:36,335 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 01:58:36,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:36,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:36,550 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 01:58:36,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:36,551 INFO L85 PathProgramCache]: Analyzing trace with hash -62611813, now seen corresponding path program 1 times [2021-11-07 01:58:36,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:36,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660981044] [2021-11-07 01:58:36,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:36,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:36,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:36,554 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:36,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:58:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:37,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:37,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:37,473 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 01:58:37,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:37,668 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 01:58:37,668 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:37,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660981044] [2021-11-07 01:58:37,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660981044] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:37,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:37,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:58:37,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407021427] [2021-11-07 01:58:37,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:37,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:37,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:37,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:37,672 INFO L87 Difference]: Start difference. First operand 2030 states and 3586 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 01:58:37,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:37,979 INFO L93 Difference]: Finished difference Result 5679 states and 10051 transitions. [2021-11-07 01:58:37,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:37,980 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 01:58:37,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:38,009 INFO L225 Difference]: With dead ends: 5679 [2021-11-07 01:58:38,009 INFO L226 Difference]: Without dead ends: 3749 [2021-11-07 01:58:38,015 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 01:58:38,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3749 states. [2021-11-07 01:58:38,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3749 to 2934. [2021-11-07 01:58:38,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2934 states, 2928 states have (on average 1.792691256830601) internal successors, (5249), 2933 states have internal predecessors, (5249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:38,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 5249 transitions. [2021-11-07 01:58:38,313 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 5249 transitions. Word has length 71 [2021-11-07 01:58:38,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:38,314 INFO L470 AbstractCegarLoop]: Abstraction has 2934 states and 5249 transitions. [2021-11-07 01:58:38,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:38,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 5249 transitions. [2021-11-07 01:58:38,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:58:38,321 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:38,321 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:38,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:38,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:38,537 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 01:58:38,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:38,538 INFO L85 PathProgramCache]: Analyzing trace with hash 779017243, now seen corresponding path program 1 times [2021-11-07 01:58:38,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:38,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814483658] [2021-11-07 01:58:38,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:38,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:38,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:38,541 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:38,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:58:39,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:39,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:39,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:39,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:39,849 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 01:58:39,849 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:39,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814483658] [2021-11-07 01:58:39,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814483658] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:39,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:39,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:58:39,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326392626] [2021-11-07 01:58:39,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:39,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:39,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:39,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:39,852 INFO L87 Difference]: Start difference. First operand 2934 states and 5249 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:40,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:40,299 INFO L93 Difference]: Finished difference Result 8127 states and 14559 transitions. [2021-11-07 01:58:40,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:40,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:58:40,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:40,339 INFO L225 Difference]: With dead ends: 8127 [2021-11-07 01:58:40,348 INFO L226 Difference]: Without dead ends: 5327 [2021-11-07 01:58:40,355 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:40,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5327 states. [2021-11-07 01:58:40,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5327 to 4512. [2021-11-07 01:58:40,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4512 states, 4506 states have (on average 1.808699511762095) internal successors, (8150), 4511 states have internal predecessors, (8150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:40,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4512 states to 4512 states and 8150 transitions. [2021-11-07 01:58:40,777 INFO L78 Accepts]: Start accepts. Automaton has 4512 states and 8150 transitions. Word has length 72 [2021-11-07 01:58:40,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:40,778 INFO L470 AbstractCegarLoop]: Abstraction has 4512 states and 8150 transitions. [2021-11-07 01:58:40,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:40,778 INFO L276 IsEmpty]: Start isEmpty. Operand 4512 states and 8150 transitions. [2021-11-07 01:58:40,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:58:40,789 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:40,789 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:40,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:41,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:41,009 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 01:58:41,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:41,009 INFO L85 PathProgramCache]: Analyzing trace with hash 490702860, now seen corresponding path program 1 times [2021-11-07 01:58:41,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:41,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523685430] [2021-11-07 01:58:41,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:41,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:41,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:41,013 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:41,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:58:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:41,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:41,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:41,922 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 01:58:41,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:42,134 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 01:58:42,135 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:42,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523685430] [2021-11-07 01:58:42,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523685430] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:42,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:42,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:58:42,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245097734] [2021-11-07 01:58:42,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:42,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:42,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:42,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:42,138 INFO L87 Difference]: Start difference. First operand 4512 states and 8150 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:42,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:42,638 INFO L93 Difference]: Finished difference Result 12577 states and 22745 transitions. [2021-11-07 01:58:42,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:42,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:58:42,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:42,671 INFO L225 Difference]: With dead ends: 12577 [2021-11-07 01:58:42,671 INFO L226 Difference]: Without dead ends: 8233 [2021-11-07 01:58:42,680 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:42,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8233 states. [2021-11-07 01:58:43,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8233 to 7418. [2021-11-07 01:58:43,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7418 states, 7412 states have (on average 1.8196168375607125) internal successors, (13487), 7417 states have internal predecessors, (13487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:43,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7418 states to 7418 states and 13487 transitions. [2021-11-07 01:58:43,291 INFO L78 Accepts]: Start accepts. Automaton has 7418 states and 13487 transitions. Word has length 73 [2021-11-07 01:58:43,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:43,292 INFO L470 AbstractCegarLoop]: Abstraction has 7418 states and 13487 transitions. [2021-11-07 01:58:43,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:43,292 INFO L276 IsEmpty]: Start isEmpty. Operand 7418 states and 13487 transitions. [2021-11-07 01:58:43,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:58:43,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:43,302 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:43,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:43,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:43,526 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 01:58:43,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:43,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1954036844, now seen corresponding path program 1 times [2021-11-07 01:58:43,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:43,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202404782] [2021-11-07 01:58:43,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:43,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:43,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:43,530 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:43,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:58:44,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:44,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:44,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:44,525 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 01:58:44,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:44,759 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 01:58:44,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:44,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202404782] [2021-11-07 01:58:44,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202404782] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:44,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:44,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:58:44,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318583406] [2021-11-07 01:58:44,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:44,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:44,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:44,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:44,763 INFO L87 Difference]: Start difference. First operand 7418 states and 13487 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:45,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:45,449 INFO L93 Difference]: Finished difference Result 21621 states and 39367 transitions. [2021-11-07 01:58:45,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:45,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:58:45,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:45,502 INFO L225 Difference]: With dead ends: 21621 [2021-11-07 01:58:45,502 INFO L226 Difference]: Without dead ends: 14379 [2021-11-07 01:58:45,516 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:45,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14379 states. [2021-11-07 01:58:46,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14379 to 13564. [2021-11-07 01:58:46,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13564 states, 13558 states have (on average 1.8268181147661897) internal successors, (24768), 13563 states have internal predecessors, (24768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:46,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13564 states to 13564 states and 24768 transitions. [2021-11-07 01:58:46,527 INFO L78 Accepts]: Start accepts. Automaton has 13564 states and 24768 transitions. Word has length 74 [2021-11-07 01:58:46,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:46,527 INFO L470 AbstractCegarLoop]: Abstraction has 13564 states and 24768 transitions. [2021-11-07 01:58:46,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:46,528 INFO L276 IsEmpty]: Start isEmpty. Operand 13564 states and 24768 transitions. [2021-11-07 01:58:46,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:58:46,539 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:46,540 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:46,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:46,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:46,753 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 01:58:46,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:46,754 INFO L85 PathProgramCache]: Analyzing trace with hash 293877148, now seen corresponding path program 1 times [2021-11-07 01:58:46,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:46,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918023939] [2021-11-07 01:58:46,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:46,755 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:46,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:46,757 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:46,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:58:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:47,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:58:47,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:47,724 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 01:58:47,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:47,957 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 01:58:47,957 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:47,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918023939] [2021-11-07 01:58:47,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918023939] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:47,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:47,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:58:47,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719089009] [2021-11-07 01:58:47,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:58:47,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:47,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:58:47,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:58:47,960 INFO L87 Difference]: Start difference. First operand 13564 states and 24768 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:51,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:51,211 INFO L93 Difference]: Finished difference Result 33789 states and 61669 transitions. [2021-11-07 01:58:51,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:58:51,212 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:58:51,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:51,279 INFO L225 Difference]: With dead ends: 33789 [2021-11-07 01:58:51,280 INFO L226 Difference]: Without dead ends: 20522 [2021-11-07 01:58:51,301 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 144 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 01:58:51,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20522 states. [2021-11-07 01:58:52,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20522 to 13531. [2021-11-07 01:58:52,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13531 states, 13525 states have (on average 1.8215157116451017) internal successors, (24636), 13530 states have internal predecessors, (24636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:52,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13531 states to 13531 states and 24636 transitions. [2021-11-07 01:58:52,099 INFO L78 Accepts]: Start accepts. Automaton has 13531 states and 24636 transitions. Word has length 75 [2021-11-07 01:58:52,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:52,099 INFO L470 AbstractCegarLoop]: Abstraction has 13531 states and 24636 transitions. [2021-11-07 01:58:52,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:52,100 INFO L276 IsEmpty]: Start isEmpty. Operand 13531 states and 24636 transitions. [2021-11-07 01:58:52,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:58:52,110 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:52,110 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:52,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:52,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:52,326 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 01:58:52,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:52,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1808488517, now seen corresponding path program 1 times [2021-11-07 01:58:52,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:52,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414629307] [2021-11-07 01:58:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:52,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:52,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:52,328 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:52,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:58:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:53,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:53,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:53,287 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 01:58:53,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:53,480 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 01:58:53,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:53,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1414629307] [2021-11-07 01:58:53,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1414629307] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:53,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:53,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:58:53,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907132049] [2021-11-07 01:58:53,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:53,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:53,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:53,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:53,483 INFO L87 Difference]: Start difference. First operand 13531 states and 24636 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:54,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:54,671 INFO L93 Difference]: Finished difference Result 39792 states and 72521 transitions. [2021-11-07 01:58:54,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:54,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:58:54,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:54,736 INFO L225 Difference]: With dead ends: 39792 [2021-11-07 01:58:54,736 INFO L226 Difference]: Without dead ends: 26444 [2021-11-07 01:58:54,765 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:54,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26444 states. [2021-11-07 01:58:56,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26444 to 25629. [2021-11-07 01:58:56,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25629 states, 25623 states have (on average 1.824493619014167) internal successors, (46749), 25628 states have internal predecessors, (46749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:56,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25629 states to 25629 states and 46749 transitions. [2021-11-07 01:58:56,402 INFO L78 Accepts]: Start accepts. Automaton has 25629 states and 46749 transitions. Word has length 75 [2021-11-07 01:58:56,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:56,402 INFO L470 AbstractCegarLoop]: Abstraction has 25629 states and 46749 transitions. [2021-11-07 01:58:56,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:56,402 INFO L276 IsEmpty]: Start isEmpty. Operand 25629 states and 46749 transitions. [2021-11-07 01:58:56,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:58:56,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:56,415 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:56,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:56,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:56,629 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 01:58:56,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:56,630 INFO L85 PathProgramCache]: Analyzing trace with hash -594195845, now seen corresponding path program 1 times [2021-11-07 01:58:56,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:56,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121769227] [2021-11-07 01:58:56,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:56,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:56,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:56,633 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:56,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:58:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:57,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:57,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:57,749 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 01:58:57,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:57,935 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 01:58:57,935 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:57,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121769227] [2021-11-07 01:58:57,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121769227] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:57,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:57,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:58:57,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544160777] [2021-11-07 01:58:57,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:57,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:57,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:57,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:57,938 INFO L87 Difference]: Start difference. First operand 25629 states and 46749 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:59,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:59,679 INFO L93 Difference]: Finished difference Result 70725 states and 128596 transitions. [2021-11-07 01:58:59,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:59,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:58:59,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:59,774 INFO L225 Difference]: With dead ends: 70725 [2021-11-07 01:58:59,774 INFO L226 Difference]: Without dead ends: 45326 [2021-11-07 01:58:59,801 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:59,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45326 states. [2021-11-07 01:59:02,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45326 to 44511. [2021-11-07 01:59:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44511 states, 44505 states have (on average 1.8140433659139423) internal successors, (80734), 44510 states have internal predecessors, (80734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:02,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44511 states to 44511 states and 80734 transitions. [2021-11-07 01:59:02,639 INFO L78 Accepts]: Start accepts. Automaton has 44511 states and 80734 transitions. Word has length 76 [2021-11-07 01:59:02,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:02,639 INFO L470 AbstractCegarLoop]: Abstraction has 44511 states and 80734 transitions. [2021-11-07 01:59:02,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:02,639 INFO L276 IsEmpty]: Start isEmpty. Operand 44511 states and 80734 transitions. [2021-11-07 01:59:02,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:59:02,651 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:02,652 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:02,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:02,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:02,865 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 01:59:02,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:02,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1464779234, now seen corresponding path program 1 times [2021-11-07 01:59:02,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:02,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873307529] [2021-11-07 01:59:02,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:02,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:02,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:02,867 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:02,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:59:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:03,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:59:03,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:03,784 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 01:59:03,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:04,099 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 01:59:04,099 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:04,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873307529] [2021-11-07 01:59:04,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873307529] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:04,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:04,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:59:04,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479640795] [2021-11-07 01:59:04,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:59:04,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:04,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:59:04,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:59:04,102 INFO L87 Difference]: Start difference. First operand 44511 states and 80734 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:11,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:11,688 INFO L93 Difference]: Finished difference Result 173312 states and 314237 transitions. [2021-11-07 01:59:11,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:59:11,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:59:11,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:11,947 INFO L225 Difference]: With dead ends: 173312 [2021-11-07 01:59:11,947 INFO L226 Difference]: Without dead ends: 129097 [2021-11-07 01:59:12,008 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 148 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 01:59:12,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129097 states. [2021-11-07 01:59:15,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129097 to 44253. [2021-11-07 01:59:15,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44253 states, 44247 states have (on average 1.8012972630912831) internal successors, (79702), 44252 states have internal predecessors, (79702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:15,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44253 states to 44253 states and 79702 transitions. [2021-11-07 01:59:15,388 INFO L78 Accepts]: Start accepts. Automaton has 44253 states and 79702 transitions. Word has length 77 [2021-11-07 01:59:15,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:15,388 INFO L470 AbstractCegarLoop]: Abstraction has 44253 states and 79702 transitions. [2021-11-07 01:59:15,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:15,389 INFO L276 IsEmpty]: Start isEmpty. Operand 44253 states and 79702 transitions. [2021-11-07 01:59:15,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:59:15,402 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:15,402 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:15,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:15,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:15,617 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 01:59:15,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:15,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1173694464, now seen corresponding path program 1 times [2021-11-07 01:59:15,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:15,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312827005] [2021-11-07 01:59:15,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:15,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:15,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:15,620 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:15,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:59:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:16,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:59:16,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:16,726 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 01:59:16,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:16,907 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 01:59:16,907 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:16,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312827005] [2021-11-07 01:59:16,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312827005] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:16,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:16,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:59:16,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241332131] [2021-11-07 01:59:16,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:59:16,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:16,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:59:16,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:59:16,909 INFO L87 Difference]: Start difference. First operand 44253 states and 79702 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:19,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:19,061 INFO L93 Difference]: Finished difference Result 89019 states and 160264 transitions. [2021-11-07 01:59:19,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:59:19,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:59:19,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:19,127 INFO L225 Difference]: With dead ends: 89019 [2021-11-07 01:59:19,127 INFO L226 Difference]: Without dead ends: 45068 [2021-11-07 01:59:19,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 150 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 01:59:19,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45068 states. [2021-11-07 01:59:21,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45068 to 44253. [2021-11-07 01:59:21,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44253 states, 44247 states have (on average 1.7984044115985265) internal successors, (79574), 44252 states have internal predecessors, (79574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44253 states to 44253 states and 79574 transitions. [2021-11-07 01:59:21,249 INFO L78 Accepts]: Start accepts. Automaton has 44253 states and 79574 transitions. Word has length 77 [2021-11-07 01:59:21,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:21,250 INFO L470 AbstractCegarLoop]: Abstraction has 44253 states and 79574 transitions. [2021-11-07 01:59:21,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:21,250 INFO L276 IsEmpty]: Start isEmpty. Operand 44253 states and 79574 transitions. [2021-11-07 01:59:21,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:59:21,258 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:21,258 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:21,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:21,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:21,458 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 01:59:21,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:21,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1076597459, now seen corresponding path program 1 times [2021-11-07 01:59:21,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:21,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497145260] [2021-11-07 01:59:21,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:21,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:21,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:21,460 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:21,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63812852-9f13-4ea6-9541-09fc49ac383f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:59:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:22,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:59:22,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:22,363 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 01:59:22,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:22,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:22,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497145260] [2021-11-07 01:59:22,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497145260] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:22,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:22,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:59:22,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796091266] [2021-11-07 01:59:22,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:59:22,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:22,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:59:22,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:22,524 INFO L87 Difference]: Start difference. First operand 44253 states and 79574 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:25,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:25,968 INFO L93 Difference]: Finished difference Result 124261 states and 223186 transitions. [2021-11-07 01:59:25,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:59:25,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:59:25,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:26,100 INFO L225 Difference]: With dead ends: 124261 [2021-11-07 01:59:26,100 INFO L226 Difference]: Without dead ends: 80270 [2021-11-07 01:59:26,130 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:26,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80270 states. [2021-11-07 01:59:30,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80270 to 79455. [2021-11-07 01:59:30,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79455 states, 79449 states have (on average 1.7926342685244623) internal successors, (142423), 79454 states have internal predecessors, (142423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)